##############################
172.23.121.126: 1 core dump seen
2021-11-24 08:48:27,519 | infra | DEBUG   | MainThread | [remote_util:execute_command_raw_jsch:3307] Running command on 172.23.121.126: rm -rf /opt/couchbase/var/lib/couchbase/crash/e299ceb3-8985-4ce0-0c4601b6-3fda1379.core
running: //opt/couchbase/bin/minidump-2-core /opt/couchbase/var/lib/couchbase/crash/e299ceb3-8985-4ce0-0c4601b6-3fda1379.dmp > /opt/couchbase/var/lib/couchbase/crash/e299ceb3-8985-4ce0-0c4601b6-3fda1379.core
2021-11-24 08:48:27,538 | infra | DEBUG   | MainThread | [remote_util:execute_command_raw_jsch:3307] Running command on 172.23.121.126: //opt/couchbase/bin/minidump-2-core /opt/couchbase/var/lib/couchbase/crash/e299ceb3-8985-4ce0-0c4601b6-3fda1379.dmp > /opt/couchbase/var/lib/couchbase/crash/e299ceb3-8985-4ce0-0c4601b6-3fda1379.core
running: gdb --batch /opt/couchbase/bin/memcached -c /opt/couchbase/var/lib/couchbase/crash/e299ceb3-8985-4ce0-0c4601b6-3fda1379.core -ex "bt full" -ex quit
2021-11-24 08:48:27,572 | infra | DEBUG   | MainThread | [remote_util:execute_command_raw_jsch:3307] Running command on 172.23.121.126: gdb --batch /opt/couchbase/bin/memcached -c /opt/couchbase/var/lib/couchbase/crash/e299ceb3-8985-4ce0-0c4601b6-3fda1379.core -ex "bt full" -ex quit
172.23.121.126: Stack Trace of first crash - e299ceb3-8985-4ce0-0c4601b6-3fda1379.dmp
Core was generated by `/opt/couchbase/bin/memcached -C /opt/couchbase/var/lib/couchbase/config/memcach'.
 #0  0x00007f56e2643387 in raise () from /lib64/libc.so.6
 #0  0x00007f56e2643387 in raise () from /lib64/libc.so.6
 No symbol table info available.
 #1  0x00007f56e2644a78 in abort () from /lib64/libc.so.6
 No symbol table info available.
 #2  0x00007f56e2f8e63c in __gnu_cxx::__verbose_terminate_handler() [clone .cold] () from /opt/couchbase/bin/../lib/libstdc++.so.6
 No symbol table info available.
 #3  0x0000000000afd3db in backtrace_terminate_handler() () at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/utilities/terminate_handler.cc:88
 No locals.
 #4  0x00007f56e2f998f6 in __cxxabiv1::__terminate(void (*)()) () from /opt/couchbase/bin/../lib/libstdc++.so.6
 No symbol table info available.
 #5  0x00007f56e2f99961 in std::terminate() () from /opt/couchbase/bin/../lib/libstdc++.so.6
 No symbol table info available.
 #6  0x00007f56e2f99bf4 in __cxa_throw () from /opt/couchbase/bin/../lib/libstdc++.so.6
 No symbol table info available.
 #7  0x00000000004c272e in ActiveDurabilityMonitor::State::updateHighCompletedSeqno (this=0x7f55ef0d6e00) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/durability/active_durability_monitor.cc:1620
         e = @0x7f5678000940: <incomplete type>
 #8  0x00000000007f784c in ActiveDurabilityMonitor::commit(DurabilityMonitor::ActiveSyncWrite const&) () at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/durability/active_durability_monitor.cc:919
         s = {holder_ = {<folly::LockedPtrBase<folly::Synchronized<std::unique_ptr<ActiveDurabilityMonitor::State, std::default_delete<ActiveDurabilityMonitor::State> >, folly::SharedMutexImpl<false, void, std::atomic, false, false> >, folly::SharedMutexImpl<false, void, std::atomic, false, false>, folly::LockPolicyExclusive>> = {parent_ = 0x7f54ec53f1e8}, static AllowsConcurrentAccess = false}}
         key = <optimized out>
         cHandle = {<Collections::VB::ReadHandle> = {readLock = {lock_ = 0x7f56d4395158, token_ = {type_ = folly::SharedMutexToken::DEFERRED_SHARED, slot_ = 8}}, manifest = 0x7f56d43950c0}, itr = {<folly::f14::detail::BaseIter<std::pair<CollectionID const, Collections::VB::ManifestEntry> const*, std::pair<CollectionID const, Collections::VB::ManifestEntry>*>> = {<No data fields>}, underlying_ = {itemPtr_ = 0x7f5650d1ad50, index_ = 8}}, key = {<DocKeyInterface<DocKey>> = {<No data fields>}, buffer = {static npos = <optimized out>, buf = 0x7f55f3c60d20 <Address 0x7f55f3c60d20 out of bounds>, len = 19}, encoding = Yes}}
         prepareEnd = {__d = {__r = 8069434606129862}}
         cookie = <optimized out>
         result = <optimized out>
         __func__ = "commit"
         index = <optimized out>
         commitDuration = <optimized out>
 #9  0x00000000007fe273 in ActiveDurabilityMonitor::processCompletedSyncWriteQueue() () at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/durability/active_durability_monitor.cc:488
         sw = {storage_ = {{emptyState = 0 '\000', value = {<DurabilityMonitor::SyncWrite> = {item = {value = 0x7f55e5e75f00}, startTime = {__d = {__r = 8069346703426060}}, status = ToCommit}, cookie = 0x0, firstChain = {ackCount = {<ThrowExceptionPolicy<unsigned char>> = {label = {static npos = 18446744073709551615, _M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>> = {<No data fields>}, <No data fields>}, _M_p = 0x7f5683fed2e0 "unlabelled"}, _M_string_length = 10, {_M_local_buf = "unlabelled\000&V\177\000", _M_allocated_capacity = 7812730926796664437}}}, val = 0 '\000'}, chainPtr = 0x0}, secondChain = {ackCount = {<ThrowExceptionPolicy<unsigned char>> = {label = {static npos = 18446744073709551615, _M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>> = {<No data fields>}, <No data fields>}, _M_p = 0x7f5683fed310 "unlabelled"}, _M_string_length = 10, {_M_local_buf = "unlabelled\000&V\177\000", _M_allocated_capacity = 7812730926796664437}}}, val = 0 '\000'}, chainPtr = 0x0}, expiryTime = {<std::_Optional_base<std::chrono::time_point<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1, 1000000000> > >, true, true>> = {<std::_Optional_base_impl<std::chrono::time_point<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1, 1000000000> > >, std::_Optional_base<std::chrono::time_point<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1, 1000000000> > >, true, true> >> = {<No data fields>}, _M_payload = {<std::_Optional_payload_base<std::chrono::time_point<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1, 1000000000> > > >> = {_M_payload = {_M_empty = {<No data fields>}, _M_value = {__d = {__r = 0}}}, _M_engaged = false}, <No data fields>}}, <std::_Enable_copy_move<true, true, true, true, std::optional<std::chrono::time_point<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1, 1000000000> > > > >> = {<No data fields>}, <No data fields>}}}, hasValue = true}}
         lock = <optimized out>
 #10 0x000000000071f484 in VBucket::processResolvedSyncWrites() () at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/vbucket.cc:710
         rlh = {lock_ = 0x7f55e6baf7f8, token_ = {type_ = folly::SharedMutexToken::INLINE_SHARED, slot_ = 115}}
 #11 0x0000000000840158 in VBNotifiableTask::run() () at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/vb_notifiable_task.cc:53
         vb = {<std::__shared_ptr<VBucket, (__gnu_cxx::_Lock_policy)2>> = {<std::__shared_ptr_access<VBucket, (__gnu_cxx::_Lock_policy)2, false, false>> = {<No data fields>}, _M_ptr = 0x7f55e6baf600, _M_refcount = {_M_pi = 0x7f56439d2f60}}, <No data fields>}
         runtime = <optimized out>
         startTime = {__d = {__r = 8069434606121978}}
         pendingVb = {vbid = 494}
 #12 0x0000000000a6d9d2 in GlobalTask::execute() () at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/globaltask.cc:68
         guard = {previous = 0x0}
 #13 0x0000000000a6abe5 in FollyExecutorPool::TaskProxy::scheduleViaCPUPool()::{lambda()#2}::operator()() const (__closure=0x7f5683fed840) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/folly_executorpool.cc:189
         scheduleOverhead = <optimized out>
         start = {__d = {__r = 8069434606120059}}
         runAgain = false
         proxy = @0x7f56e15c3c10: <error reading variable>
 #14 0x0000000000bbf750 in operator() (this=0x7f5683fed840) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/Function.h:416
         fn = @0x7f5683fed840: {<folly::detail::function::FunctionTraits<void()>> = {<No data fields>}, data_ = {big = 0x7f56e15c3c10, tiny = {__data = "\020<\\\341V\177\000\000\000\000\000\000\000\000\000\000\260\"<EV\177\000\000\063\313\001\000\000\000\000\000\220\000\000\000\000\000\000\000\020\331\376\203V\177\000", __align = {<No data fields>}}}, call_ = 0xa6b2a0 <folly::detail::function::FunctionTraits<void ()>::callSmall<FollyExecutorPool::TaskProxy::scheduleViaCPUPool()::{lambda()#2}>(folly::detail::function::Data&)>, exec_ = 0xa699f0 <folly::detail::function::execSmall<FollyExecutorPool::TaskProxy::scheduleViaCPUPool()::{lambda()#2}>(folly::detail::function::Op, folly::detail::function::Data*, folly::detail::function::Data)>}
 #15 folly::ThreadPoolExecutor::runTask(std::shared_ptr<folly::ThreadPoolExecutor::Thread> const&, folly::ThreadPoolExecutor::Task&&) (this=this@entry=0x7f56e1157c00, thread=..., task=task@entry=<unknown type in /usr/lib/debug/opt/couchbase/bin/memcached-7.1.0-1745.x86_64.debug, CU 0xa026ee0, DIE 0xa0aae15>) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/ThreadPoolExecutor.cpp:97
         rctx = {prev_ = {<std::__shared_ptr<folly::RequestContext, (__gnu_cxx::_Lock_policy)2>> = {<std::__shared_ptr_access<folly::RequestContext, (__gnu_cxx::_Lock_policy)2, false, false>> = {<No data fields>}, _M_ptr = 0x0, _M_refcount = {_M_pi = 0x0}}, <No data fields>}}
         startTime = {__d = {__r = 8069434606115758}}
         stats = {expired = false, waitTime = {__r = 14806}, runTime = {__r = 0}, enqueueTime = {__d = {__r = 8069434606100952}}, requestId = 0}
 #16 0x0000000000ba750a in folly::CPUThreadPoolExecutor::threadRun (this=0x7f56e1157c00, thread=...) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/CPUThreadPoolExecutor.cpp:265
         task = {storage_ = {{emptyState = 16 '\020', value = {<folly::ThreadPoolExecutor::Task> = {func_ = {<folly::detail::function::FunctionTraits<void()>> = {<No data fields>}, data_ = {big = 0x7f56e15c3c10, tiny = {__data = "\020<\\\341V\177\000\000\000\000\000\000\000\000\000\000\260\"<EV\177\000\000\063\313\001\000\000\000\000\000\220\000\000\000\000\000\000\000\020\331\376\203V\177\000", __align = {<No data fields>}}}, call_ = 0xa6b2a0 <folly::detail::function::FunctionTraits<void ()>::callSmall<FollyExecutorPool::TaskProxy::scheduleViaCPUPool()::{lambda()#2}>(folly::detail::function::Data&)>, exec_ = 0xa699f0 <folly::detail::function::execSmall<FollyExecutorPool::TaskProxy::scheduleViaCPUPool()::{lambda()#2}>(folly::detail::function::Op, folly::detail::function::Data*, folly::detail::function::Data)>}, enqueueTime_ = {__d = {__r = 8069434606100952}}, expiration_ = {__r = 0}, expireCallback_ = {<folly::detail::function::FunctionTraits<void()>> = {<No data fields>}, data_ = {big = 0x1cb33, tiny = {__data = "3\313\001\000\000\000\000\000\333)\242", '\000' <repeats 13 times>, "_\276\037\345V\177\000\000p\352>\316V\177\000\000@V@\345V\177\000", __align = {<No data fields>}}}, call_ = 0x463cfd <folly::detail::function::FunctionTraits<void ()>::uninitCall(folly::detail::function::Data&)>, exec_ = 0x0}, context_ = {<std::__shared_ptr<folly::RequestContext, (__gnu_cxx::_Lock_policy)2>> = {<std::__shared_ptr_access<folly::RequestContext, (__gnu_cxx::_Lock_policy)2, false, false>> = {<No data fields>}, _M_ptr = 0x0, _M_refcount = {_M_pi = 0x0}}, <No data fields>}}, poison = false, priority_ = 0 '\000', queueObserverPayload_ = 140011140538112}}, hasValue = true}}
         guard = {list_ = {forbid = true, prev = 0x0, curr = {name = {static npos = <optimized out>, b_ = 0xc7b62b "CPUThreadPoolExecutor", e_ = 0xc7b640 ""}}}}
 #17 0x0000000000bc2709 in __invoke_impl<void, void (folly::ThreadPoolExecutor::*&)(std::shared_ptr<folly::ThreadPoolExecutor::Thread>), folly::ThreadPoolExecutor*&, std::shared_ptr<folly::ThreadPoolExecutor::Thread>&> (__t=<optimized out>, __f=<optimized out>) at /usr/local/include/c++/7.3.0/bits/invoke.h:73
 No locals.
 #18 __invoke<void (folly::ThreadPoolExecutor::*&)(std::shared_ptr<folly::ThreadPoolExecutor::Thread>), folly::ThreadPoolExecutor*&, std::shared_ptr<folly::ThreadPoolExecutor::Thread>&> (__fn=<optimized out>) at /usr/local/include/c++/7.3.0/bits/invoke.h:95
 No locals.
 #19 __call<void, 0, 1> (__args=<optimized out>, this=<optimized out>) at /usr/local/include/c++/7.3.0/functional:467
 No locals.
 #20 operator()<> (this=<optimized out>) at /usr/local/include/c++/7.3.0/functional:551
 No locals.
 #21 folly::detail::function::FunctionTraits<void ()>::callBig<std::_Bind<void (folly::ThreadPoolExecutor::*(folly::ThreadPoolExecutor*, std::shared_ptr<folly::ThreadPoolExecutor::Thread>))(std::shared_ptr<folly::ThreadPoolExecutor::Thread>)> >(folly::detail::function::Data&) (p=...) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/Function.h:401
         fn = <optimized out>
 #22 0x0000000000a6a874 in operator() (this=0x7f56e15e4080) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/folly_executorpool.cc:47
         fn = @0x7f56e15e4080: <error reading variable>
 #23 operator() (__closure=0x7f56e15e4080) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/folly_executorpool.cc:47
         threadNameOpt = {storage_ = {{emptyState = -96 '\240', value = {static npos = 18446744073709551615, _M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>> = {<No data fields>}, <No data fields>}, _M_p = 0x7f5683fed9a0 "NonIoPool0"}, _M_string_length = 10, {_M_local_buf = "NonIoPool0\000\000\000\000\000", _M_allocated_capacity = 8029725099528449870}}}, hasValue = true}}
         func = <error reading variable func (Cannot access memory at address 0x7f56e15e4080)>
 #24 folly::detail::function::FunctionTraits<void ()>::callBig<CBRegisteredThreadFactory::newThread(folly::Function<void ()>&&)::{lambda()#1}>(folly::detail::function::Data&) (p=...) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/Function.h:401
         fn = @0x7f56e15e4080: <error reading variable>
 #25 0x00007f56e2fc2d40 in execute_native_thread_routine () from /opt/couchbase/bin/../lib/libstdc++.so.6
 No symbol table info available.
 #26 0x00007f56e4dcaea5 in start_thread () from /lib64/libpthread.so.0
 No symbol table info available.
 #27 0x00007f56e270b8dd in clone () from /lib64/libc.so.6
 No symbol table info available.

##############################
running: gdb -p `(pidof memcached)` -ex "thread apply all bt" -ex detach -ex quit
2021-11-24 08:48:36,246 | infra | DEBUG   | MainThread | [remote_util:execute_command_raw_jsch:3307] Running command on 172.23.121.126: gdb -p `(pidof memcached)` -ex "thread apply all bt" -ex detach -ex quit
5 queries submitted, 0 failed,                         5080 passed, 0 rejected,                         0 cancelled, 0 timeout
[Thread debugging using libthread_db enabled]
 Using host libthread_db library "/lib64/libthread_db.so.1".
 Loaded symbols for /lib64/libpthread.so.0
 Reading symbols from /lib64/librt.so.1...(no debugging symbols found)...done.
 Loaded symbols for /lib64/librt.so.1
 Reading symbols from /opt/couchbase/bin/../lib/liblz4.so.1...Reading symbols from /usr/lib/debug/opt/couchbase/lib/liblz4.so.1.9.2-7.1.0-1745.x86_64.debug...(no debugging symbols found)...done.
 (no debugging symbols found)...done.
 Loaded symbols for /opt/couchbase/bin/../lib/liblz4.so.1
 Reading symbols from /opt/couchbase/bin/../lib/libsnappy.so.1...Reading symbols from /usr/lib/debug/opt/couchbase/lib/libsnappy.so.1.1.8-7.1.0-1745.x86_64.debug...done.
 done.
 Loaded symbols for /opt/couchbase/bin/../lib/libsnappy.so.1
 Reading symbols from /opt/couchbase/bin/../lib/libjemalloc.so.2...Reading symbols from /usr/lib/debug/opt/couchbase/lib/libjemalloc.so.2-7.1.0-1745.x86_64.debug...done.
 done.
 Loaded symbols for /opt/couchbase/bin/../lib/libjemalloc.so.2
 Reading symbols from /opt/couchbase/bin/../lib/libevent_core-2.1.so.7...Reading symbols from /usr/lib/debug/opt/couchbase/lib/libevent_core-2.1.so.7.0.0-7.1.0-1745.x86_64.debug...done.
 done.
 Loaded symbols for /opt/couchbase/bin/../lib/libevent_core-2.1.so.7
 Reading symbols from /opt/couchbase/bin/../lib/libevent_extra-2.1.so.7...Reading symbols from /usr/lib/debug/opt/couchbase/lib/libevent_extra-2.1.so.7.0.0-7.1.0-1745.x86_64.debug...done.
 done.
 Loaded symbols for /opt/couchbase/bin/../lib/libevent_extra-2.1.so.7
 Reading symbols from /opt/couchbase/bin/../lib/libevent_pthreads-2.1.so.7...Reading symbols from /usr/lib/debug/opt/couchbase/lib/libevent_pthreads-2.1.so.7.0.0-7.1.0-1745.x86_64.debug...done.
 done.
 Loaded symbols for /opt/couchbase/bin/../lib/libevent_pthreads-2.1.so.7
 Reading symbols from /opt/couchbase/bin/../lib/libevent_openssl-2.1.so.7...Reading symbols from /usr/lib/debug/opt/couchbase/lib/libevent_openssl-2.1.so.7.0.0-7.1.0-1745.x86_64.debug...done.
 done.
 Loaded symbols for /opt/couchbase/bin/../lib/libevent_openssl-2.1.so.7
 Reading symbols from /opt/couchbase/bin/../lib/libssl.so.1.1...Reading symbols from /usr/lib/debug/opt/couchbase/lib/libssl.so.1.1-7.1.0-1745.x86_64.debug...(no debugging symbols found)...done.
 (no debugging symbols found)...done.
 Loaded symbols for /opt/couchbase/bin/../lib/libssl.so.1.1
 Reading symbols from /opt/couchbase/bin/../lib/libcrypto.so.1.1...Reading symbols from /usr/lib/debug/opt/couchbase/lib/libcrypto.so.1.1-7.1.0-1745.x86_64.debug...(no debugging symbols found)...done.
 (no debugging symbols found)...done.
 Loaded symbols for /opt/couchbase/bin/../lib/libcrypto.so.1.1
 Reading symbols from /opt/couchbase/bin/../lib/libstdc++.so.6...(no debugging symbols found)...done.
 Loaded symbols for /opt/couchbase/bin/../lib/libstdc++.so.6
 Reading symbols from /lib64/libm.so.6...(no debugging symbols found)...done.
 Loaded symbols for /lib64/libm.so.6
 Reading symbols from /opt/couchbase/bin/../lib/libgcc_s.so.1...(no debugging symbols found)...done.
 Loaded symbols for /opt/couchbase/bin/../lib/libgcc_s.so.1
 Reading symbols from /lib64/libc.so.6...(no debugging symbols found)...done.
 Loaded symbols for /lib64/libc.so.6
 Reading symbols from /lib64/ld-linux-x86-64.so.2...(no debugging symbols found)...done.
 Loaded symbols for /lib64/ld-linux-x86-64.so.2
 0x00007f51f28a4eb3 in epoll_wait () from /lib64/libc.so.6
 To enable execution of this file add
 	add-auto-load-safe-path /opt/couchbase/lib/libstdc++.so.6.0.28-gdb.py
 line to your configuration file "/root/.gdbinit".
 To completely disable this security protection add
 	set auto-load safe-path /
 line to your configuration file "/root/.gdbinit".
 For more information about this security protection see the
 "Auto-loading safe path" section in the GDB manual.  E.g., run from the shell:
 	info "(gdb)Auto-loading safe path"
 
 Thread 78 (Thread 0x7f51f1dff700 (LWP 128432)):
 #0  0x00007f51f4f67de2 in pthread_cond_timedwait@@GLIBC_2.3.2 ()
    from /lib64/libpthread.so.0
 #1  0x00007f51f44715a7 in background_thread_sleep (tsdn=<optimized out>, 
     interval=10000000000, info=<optimized out>) at src/background_thread.c:255
 #2  background_work_sleep_once (ind=0, info=<optimized out>, 
     tsdn=<optimized out>) at src/background_thread.c:307
 #3  background_thread0_work (tsd=0x7f51f1dee220)
     at src/background_thread.c:452
 #4  background_work (ind=<optimized out>, tsd=0x7f51f1dee220)
     at src/background_thread.c:490
 #5  background_thread_entry (ind_arg=<optimized out>)
     at src/background_thread.c:522
 #6  0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #7  0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 77 (Thread 0x7f51f0cfe700 (LWP 128433)):
 #0  0x00007f51f4f67de2 in pthread_cond_timedwait@@GLIBC_2.3.2 ()
    from /lib64/libpthread.so.0
 #1  0x0000000000b229ca in __gthread_cond_timedwait (
     __abs_timeout=0x7f51f0cec800, __mutex=<optimized out>, 
     __cond=0x7f51f15c7138)
     at /usr/local/include/c++/7.3.0/x86_64-pc-linux-gnu/bits/gthr-default.h:871
 #2  __wait_until_impl<std::chrono::duration<long, std::ratio<1, 1000000000> > > (__atime=..., __lock=..., this=0x7f51f15c7138)
     at /usr/local/include/c++/7.3.0/condition_variable:166
 #3  wait_until<std::chrono::duration<long, std::ratio<1, 1000000000> > > (
     __atime=..., __lock=..., this=0x7f51f15c7138)
     at /usr/local/include/c++/7.3.0/condition_variable:106
 #4  wait_until<std::chrono::_V2::system_clock, std::chrono::duration<long int, std::ratio<1, 1000000000> >, spdlog::details::mpmc_blocking_queue<T>::dequeue_for(T&, std::chrono::milliseconds) [with T = spdlog::details::async_msg]::<lambda()> > (__p=..., __atime=..., __lock=..., this=0x7f51f15c7138)
     at /usr/local/include/c++/7.3.0/condition_variable:129
 #5  wait_for<long int, std::ratio<1, 1000>, spdlog::details::mpmc_blocking_queue<T>::dequeue_for(T&, std::chrono::milliseconds) [with T = spdlog::details::async_msg]::<lambda()> > (__p=..., __rtime=<synthetic pointer>, __lock=..., 
     this=0x7f51f15c7138)
     at /usr/local/include/c++/7.3.0/condition_variable:145
 #6  dequeue_for (wait_duration=..., popped_item=..., this=0x7f51f15c7110)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/spdlog/spdlog-prefix/src/spdlog/include/spdlog/details/mpmc_blocking_q.h:58
 #7  spdlog::details::thread_pool::process_next_msg_ (
     this=this@entry=0x7f51f15c7110)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/spdlog/spdlog-prefix/src/spdlog/include/spdlog/details/thread_pool-inl.h:99
 #8  0x0000000000b22d18 in worker_loop_ (this=0x7f51f15c7110)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/spdlog/spdlog-prefix/src/spdlog/include/spdlog/details/thread_pool-inl.h:90
 #9  operator() (__closure=<optimized out>)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/spdlog/spdlog-prefix/src/spdlog/include/spdlog/details/thread_pool-inl.h:28
 #10 __invoke_impl<void, spdlog::details::thread_pool::thread_pool(size_t, size_t, std::function<void()>)::<lambda()> > (__f=<optimized out>)
     at /usr/local/include/c++/7.3.0/bits/invoke.h:60
 #11 __invoke<spdlog::details::thread_pool::thread_pool(size_t, size_t, std::function<void()>)::<lambda()> > (__fn=<optimized out>)
     at /usr/local/include/c++/7.3.0/bits/invoke.h:95
 #12 _M_invoke<0> (this=<optimized out>)
     at /usr/local/include/c++/7.3.0/thread:234
 #13 operator() (this=<optimized out>)
     at /usr/local/include/c++/7.3.0/thread:243
 #14 std::thread::_State_impl<std::thread::_Invoker<std::tuple<spdlog::details::thread_pool::thread_pool(size_t, size_t, std::function<void()>)::<lambda()> > > >::_M_run(void) (this=<optimized out>)
     at /usr/local/include/c++/7.3.0/thread:186
 #15 0x00007f51f315bd40 in execute_native_thread_routine ()
    from /opt/couchbase/bin/../lib/libstdc++.so.6
 #16 0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #17 0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 76 (Thread 0x7f51f04fd700 (LWP 128434)):
 #0  0x00007f51f4f67de2 in pthread_cond_timedwait@@GLIBC_2.3.2 ()
    from /lib64/libpthread.so.0
 #1  0x0000000000b2278a in __gthread_cond_timedwait (
     __abs_timeout=0x7f51f04eb9b0, __mutex=<optimized out>, 
     __cond=0x7f51f15bd268)
     at /usr/local/include/c++/7.3.0/x86_64-pc-linux-gnu/bits/gthr-default.h:871
 #2  __wait_until_impl<std::chrono::duration<long, std::ratio<1, 1000000000> > > (__atime=..., __lock=..., this=0x7f51f15bd268)
     at /usr/local/include/c++/7.3.0/condition_variable:166
 #3  wait_until<std::chrono::duration<long, std::ratio<1, 1000000000> > > (
     __atime=..., __lock=..., this=0x7f51f15bd268)
     at /usr/local/include/c++/7.3.0/condition_variable:106
 #4  wait_until<std::chrono::_V2::system_clock, std::chrono::duration<long int, std::ratio<1, 1000000000> >, spdlog::details::periodic_worker::periodic_worker(const std::function<void()>&, std::chrono::seconds)::<lambda()>::<lambda()> >
     (__p=..., __atime=..., __lock=..., this=0x7f51f15bd268)
     at /usr/local/include/c++/7.3.0/condition_variable:129
 #5  wait_for<long int, std::ratio<1>, spdlog::details::periodic_worker::periodic_worker(const std::function<void()>&, std::chrono::seconds)::<lambda()>::<lambda()> > (__p=..., __rtime=..., __lock=..., this=0x7f51f15bd268)
     at /usr/local/include/c++/7.3.0/condition_variable:145
 #6  operator() (__closure=0x7f51f15c8dc8)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/spdlog/spdlog-prefix/src/spdlog/include/spdlog/details/periodic_worker-inl.h:25
 #7  __invoke_impl<void, spdlog::details::periodic_worker::periodic_worker(const std::function<void()>&, std::chrono::seconds)::<lambda()> > (
     __f=<optimized out>) at /usr/local/include/c++/7.3.0/bits/invoke.h:60
 #8  __invoke<spdlog::details::periodic_worker::periodic_worker(const std::function<void()>&, std::chrono::seconds)::<lambda()> > (__fn=<optimized out>)
     at /usr/local/include/c++/7.3.0/bits/invoke.h:95
 #9  _M_invoke<0> (this=0x7f51f15c8dc8)
     at /usr/local/include/c++/7.3.0/thread:234
 #10 operator() (this=0x7f51f15c8dc8)
     at /usr/local/include/c++/7.3.0/thread:243
 #11 std::thread::_State_impl<std::thread::_Invoker<std::tuple<spdlog::details::periodic_worker::periodic_worker(const std::function<void()>&, std::chrono::seconds)::<lambda()> > > >::_M_run(void) (this=0x7f51f15c8dc0)
     at /usr/local/include/c++/7.3.0/thread:186
 #12 0x00007f51f315bd40 in execute_native_thread_routine ()
    from /opt/couchbase/bin/../lib/libstdc++.so.6
 #13 0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #14 0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 75 (Thread 0x7f51efcfc700 (LWP 128435)):
 #0  0x00007f51f2899c3d in poll () from /lib64/libc.so.6
 #1  0x00000000005a4181 in get_command (buffsize=80, 
     buffer=0x7f51efcea990 "@\346Y\365Q\177")
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/stdin_check.cc:57
 #2  check_stdin_thread (arg=<optimized out>)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/stdin_check.cc:98
 #3  0x0000000000b54b79 in run (this=0x7f51f15bb740)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:51
 #4  platform_thread_wrap(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:64
 #5  0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #6  0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 74 (Thread 0x7f51edcf8700 (LWP 128439)):
 #0  0x00007f51f4f67de2 in pthread_cond_timedwait@@GLIBC_2.3.2 ()
    from /lib64/libpthread.so.0
 #1  0x00000000005e9dc6 in __gthread_cond_timedwait (
     __abs_timeout=0x7f51edce6980, __mutex=0x7f51f15eb350, 
     __cond=0x7f51f15eb378)
     at /opt/gcc-10.2.0/include/c++/10.2.0/x86_64-pc-linux-gnu/bits/gthr-default.h:872
 #2  __wait_until_impl<std::chrono::duration<long, std::ratio<1, 1000000000> > > (__lock=<synthetic pointer>, __lock=<synthetic pointer>, 
     __atime=<synthetic pointer>, this=0x7f51f15eb378)
     at /opt/gcc-10.2.0/include/c++/10.2.0/condition_variable:232
 #3  wait_until<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1, 1000000000> > > (__atime=..., __lock=<synthetic pointer>, 
     this=0x7f51f15eb378)
     at /opt/gcc-10.2.0/include/c++/10.2.0/condition_variable:141
 #4  wait_for<long, std::ratio<1, 1000000000> > (__rtime=<synthetic pointer>, 
     __lock=<synthetic pointer>, this=0x7f51f15eb378)
     at /opt/gcc-10.2.0/include/c++/10.2.0/condition_variable:172
 #5  ExternalAuthManagerThread::run() ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/external_auth_manager_thread.cc:91
 #6  0x0000000000b6a233 in Couchbase::Thread::thread_entry() ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/thread.cc:38
 #7  0x0000000000b54b79 in run (this=0x7f51f15bbb00)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:51
 #8  platform_thread_wrap(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:64
 #9  0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #10 0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 73 (Thread 0x7f51ed4f7700 (LWP 128441)):
 #0  0x00007f51f4f67de2 in pthread_cond_timedwait@@GLIBC_2.3.2 ()
    from /lib64/libpthread.so.0
 #1  0x0000000000673ce7 in __gthread_cond_timedwait (
     __abs_timeout=0x7f51ed4e59b0, __mutex=<optimized out>, 
     __cond=0x7f51f111d3f8)
     at /opt/gcc-10.2.0/include/c++/10.2.0/x86_64-pc-linux-gnu/bits/gthr-default.h:872
 #2  __wait_until_impl<std::chrono::duration<long, std::ratio<1, 1000000000> > > (__lock=..., __lock=..., __atime=<synthetic pointer>, this=0x7f51f111d3f8)
     at /opt/gcc-10.2.0/include/c++/10.2.0/condition_variable:232
 #3  wait_until<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1, 1000000000> > > (__atime=..., __lock=..., this=0x7f51f111d3f8)
     at /opt/gcc-10.2.0/include/c++/10.2.0/condition_variable:141
 #4  wait_for<long, std::ratio<1> > (__rtime=..., __rtime=..., __lock=..., 
     this=0x7f51f111d3f8)
     at /opt/gcc-10.2.0/include/c++/10.2.0/condition_variable:172
 #5  AuditImpl::consume_events() ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/auditd/src/audit.cc:401
 #6  0x0000000000b54b79 in run (this=0x7f51f15bbaa0)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:51
 #7  platform_thread_wrap(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:64
 #8  0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #9  0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 72 (Thread 0x7f51ee4f9700 (LWP 128442)):
 #0  0x00007f51f4f67a35 in pthread_cond_wait@@GLIBC_2.3.2 ()
    from /lib64/libpthread.so.0
 #1  0x0000000000a9c78b in consume_socket (thread_index=<optimized out>, 
     sp=0x2f745a0, ctx=0x2f75df0)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/prometheus-cpp/prometheus-cpp-prefix/src/prometheus-cpp/3rdparty/civetweb/src/civetweb.c:18846
 #2  worker_thread_run (conn=0x2f73cb0)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/prometheus-cpp/prometheus-cpp-prefix/src/prometheus-cpp/3rdparty/civetweb/src/civetweb.c:18987
 #3  worker_thread (thread_func_param=0x2f73cb0)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/prometheus-cpp/prometheus-cpp-prefix/src/prometheus-cpp/3rdparty/civetweb/src/civetweb.c:19145
 #4  0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #5  0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 71 (Thread 0x7f51eecfa700 (LWP 128443)):
 #0  0x00007f51f4f67a35 in pthread_cond_wait@@GLIBC_2.3.2 ()
    from /lib64/libpthread.so.0
 #1  0x0000000000a9c78b in consume_socket (thread_index=<optimized out>, 
     sp=0x2f74f88, ctx=0x2f75df0)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/prometheus-cpp/prometheus-cpp-prefix/src/prometheus-cpp/3rdparty/civetweb/src/civetweb.c:18846
 #2  worker_thread_run (conn=0x2f74698)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/prometheus-cpp/prometheus-cpp-prefix/src/prometheus-cpp/3rdparty/civetweb/src/civetweb.c:18987
 #3  worker_thread (thread_func_param=0x2f74698)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/prometheus-cpp/prometheus-cpp-prefix/src/prometheus-cpp/3rdparty/civetweb/src/civetweb.c:19145
 #4  0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #5  0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 70 (Thread 0x7f51ef4fb700 (LWP 128444)):
 #0  0x00007f51f2899c3d in poll () from /lib64/libc.so.6
 #1  0x0000000000a936f8 in master_thread_run (ctx=0x2f75df0)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/prometheus-cpp/prometheus-cpp-prefix/src/prometheus-cpp/3rdparty/civetweb/src/civetweb.c:19291
 #2  master_thread (thread_func_param=0x2f75df0)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/prometheus-cpp/prometheus-cpp-prefix/src/prometheus-cpp/3rdparty/civetweb/src/civetweb.c:19386
 #3  0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #4  0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 69 (Thread 0x7f51eccf6700 (LWP 128445)):
 #0  0x00007f51f28a4eb3 in epoll_wait () from /lib64/libc.so.6
 #1  0x00007f51f42383c5 in epoll_dispatch (base=0x7f51f108f900, 
     tv=<optimized out>)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/epoll.c:465
 #2  0x00007f51f422f376 in event_base_loop (base=0x7f51f108f900, flags=1)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/event.c:1998
 #3  0x0000000000bc8e37 in folly::EventBase::loopBody (
     this=this@entry=0x7f51f112c010, flags=flags@entry=0, 
     ignoreKeepAlive=ignoreKeepAlive@entry=false)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/io/async/EventBase.cpp:397
 #4  0x0000000000bc9306 in folly::EventBase::loop (
     this=this@entry=0x7f51f112c010)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/io/async/EventBase.cpp:315
 #5  0x0000000000bcacc6 in folly::EventBase::loopForever (
     this=this@entry=0x7f51f112c010)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/io/async/EventBase.cpp:538
 #6  0x00000000005a93a9 in worker_libevent (arg=0x7f51f112c000)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/thread.cc:115
 #7  0x0000000000b54b79 in run (this=0x7f51f15bbda0)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:51
 #8  platform_thread_wrap(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:64
 #9  0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #10 0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 68 (Thread 0x7f51e7fff700 (LWP 128446)):
 #0  0x00007f51f28a4eb3 in epoll_wait () from /lib64/libc.so.6
 #1  0x00007f51f42383c5 in epoll_dispatch (base=0x7f51f108fc00, 
     tv=<optimized out>)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/epoll.c:465
 #2  0x00007f51f422f376 in event_base_loop (base=0x7f51f108fc00, flags=1)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/event.c:1998
 #3  0x0000000000bc8e37 in folly::EventBase::loopBody (
     this=this@entry=0x7f51f112cbe0, flags=flags@entry=0, 
     ignoreKeepAlive=ignoreKeepAlive@entry=false)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/io/async/EventBase.cpp:397
 #4  0x0000000000bc9306 in folly::EventBase::loop (
     this=this@entry=0x7f51f112cbe0)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/io/async/EventBase.cpp:315
 #5  0x0000000000bcacc6 in folly::EventBase::loopForever (
     this=this@entry=0x7f51f112cbe0)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/io/async/EventBase.cpp:538
 #6  0x00000000005a93a9 in worker_libevent (arg=0x7f51f112cbd0)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/thread.cc:115
 #7  0x0000000000b54b79 in run (this=0x7f51f15bbec0)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:51
 #8  platform_thread_wrap(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:64
 #9  0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #10 0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 67 (Thread 0x7f51e77fe700 (LWP 128447)):
 #0  0x00007f51f28a4eb3 in epoll_wait () from /lib64/libc.so.6
 #1  0x00007f51f42383c5 in epoll_dispatch (base=0x7f51f108ff00, 
     tv=<optimized out>)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/epoll.c:465
 #2  0x00007f51f422f376 in event_base_loop (base=0x7f51f108ff00, flags=1)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/event.c:1998
 #3  0x0000000000bc8e37 in folly::EventBase::loopBody (
     this=this@entry=0x7f51f112d7b0, flags=flags@entry=0, 
     ignoreKeepAlive=ignoreKeepAlive@entry=false)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/io/async/EventBase.cpp:397
 #4  0x0000000000bc9306 in folly::EventBase::loop (
     this=this@entry=0x7f51f112d7b0)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/io/async/EventBase.cpp:315
 #5  0x0000000000bcacc6 in folly::EventBase::loopForever (
     this=this@entry=0x7f51f112d7b0)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/io/async/EventBase.cpp:538
 #6  0x00000000005a93a9 in worker_libevent (arg=0x7f51f112d7a0)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/thread.cc:115
 #7  0x0000000000b54b79 in run (this=0x7f51f15bbfe0)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:51
 #8  platform_thread_wrap(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:64
 #9  0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #10 0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 66 (Thread 0x7f51e6ffd700 (LWP 128448)):
 #0  0x00007f51f28a4eb3 in epoll_wait () from /lib64/libc.so.6
 #1  0x00007f51f42383c5 in epoll_dispatch (base=0x7f51f1090200, 
     tv=<optimized out>)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/epoll.c:465
 #2  0x00007f51f422f376 in event_base_loop (base=0x7f51f1090200, flags=1)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/event.c:1998
 #3  0x0000000000bc8e37 in folly::EventBase::loopBody (
     this=this@entry=0x7f51f112e380, flags=flags@entry=0, 
     ignoreKeepAlive=ignoreKeepAlive@entry=false)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/io/async/EventBase.cpp:397
 #4  0x0000000000bc9306 in folly::EventBase::loop (
     this=this@entry=0x7f51f112e380)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/io/async/EventBase.cpp:315
 #5  0x0000000000bcacc6 in folly::EventBase::loopForever (
     this=this@entry=0x7f51f112e380)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/io/async/EventBase.cpp:538
 #6  0x00000000005a93a9 in worker_libevent (arg=0x7f51f112e370)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/thread.cc:115
 #7  0x0000000000b54b79 in run (this=0x7f51f15bc0d0)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:51
 #8  platform_thread_wrap(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:64
 #9  0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #10 0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 65 (Thread 0x7f51e67fc700 (LWP 128449)):
 #0  0x00007f51f28a4eb3 in epoll_wait () from /lib64/libc.so.6
 #1  0x00007f51f42383c5 in epoll_dispatch (base=0x7f51f1090500, 
     tv=<optimized out>)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/epoll.c:465
 #2  0x00007f51f422f376 in event_base_loop (base=0x7f51f1090500, flags=1)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/event.c:1998
 #3  0x0000000000bc8e37 in folly::EventBase::loopBody (
     this=this@entry=0x7f51f112ef50, flags=flags@entry=0, 
     ignoreKeepAlive=ignoreKeepAlive@entry=false)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/io/async/EventBase.cpp:397
 #4  0x0000000000bc9306 in folly::EventBase::loop (
     this=this@entry=0x7f51f112ef50)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/io/async/EventBase.cpp:315
 #5  0x0000000000bcacc6 in folly::EventBase::loopForever (
     this=this@entry=0x7f51f112ef50)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/io/async/EventBase.cpp:538
 #6  0x00000000005a93a9 in worker_libevent (arg=0x7f51f112ef40)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/thread.cc:115
 #7  0x0000000000b54b79 in run (this=0x7f51f15bc0a0)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:51
 #8  platform_thread_wrap(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:64
 #9  0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #10 0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 64 (Thread 0x7f51e5ffb700 (LWP 128450)):
 #0  0x00007f51f28a4eb3 in epoll_wait () from /lib64/libc.so.6
 #1  0x00007f51f42383c5 in epoll_dispatch (base=0x7f51f1090800, 
     tv=<optimized out>)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/epoll.c:465
 #2  0x00007f51f422f376 in event_base_loop (base=0x7f51f1090800, flags=1)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/event.c:1998
 #3  0x0000000000bc8e37 in folly::EventBase::loopBody (
     this=this@entry=0x7f51f112fb20, flags=flags@entry=0, 
     ignoreKeepAlive=ignoreKeepAlive@entry=false)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/io/async/EventBase.cpp:397
 #4  0x0000000000bc9306 in folly::EventBase::loop (
     this=this@entry=0x7f51f112fb20)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/io/async/EventBase.cpp:315
 #5  0x0000000000bcacc6 in folly::EventBase::loopForever (
     this=this@entry=0x7f51f112fb20)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/io/async/EventBase.cpp:538
 #6  0x00000000005a93a9 in worker_libevent (arg=0x7f51f112fb10)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/thread.cc:115
 #7  0x0000000000b54b79 in run (this=0x7f51f15bc040)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:51
 #8  platform_thread_wrap(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:64
 #9  0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #10 0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 63 (Thread 0x7f51e57fa700 (LWP 128451)):
 #0  0x00007f51f28a4eb3 in epoll_wait () from /lib64/libc.so.6
 #1  0x00007f51f42383c5 in epoll_dispatch (base=0x7f51f1090b00, 
     tv=<optimized out>)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/epoll.c:465
 #2  0x00007f51f422f376 in event_base_loop (base=0x7f51f1090b00, flags=1)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/event.c:1998
 #3  0x0000000000bc8e37 in folly::EventBase::loopBody (
     this=this@entry=0x7f51f11306f0, flags=flags@entry=0, 
     ignoreKeepAlive=ignoreKeepAlive@entry=false)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/io/async/EventBase.cpp:397
 #4  0x0000000000bc9306 in folly::EventBase::loop (
     this=this@entry=0x7f51f11306f0)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/io/async/EventBase.cpp:315
 #5  0x0000000000bcacc6 in folly::EventBase::loopForever (
     this=this@entry=0x7f51f11306f0)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/io/async/EventBase.cpp:538
 #6  0x00000000005a93a9 in worker_libevent (arg=0x7f51f11306e0)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/thread.cc:115
 #7  0x0000000000b54b79 in run (this=0x7f51f15bc070)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:51
 #8  platform_thread_wrap(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:64
 #9  0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #10 0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 62 (Thread 0x7f51e4ff9700 (LWP 128452)):
 #0  0x00007f51f4f6afc3 in pread64 () from /lib64/libpthread.so.0
 #1  0x0000000000996858 in magma::BasicFile::Read(long, unsigned long, char*, unsigned long*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/file/file_impl_linux.cc:145
 #2  0x00000000009f7f8a in magma::FileWithStats::Read(long, unsigned long, char*, unsigned long*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/file/file_impl_stats.cc:39
 #3  0x000000000099aae6 in magma::BufferedFileReader::Read(magma::File*, long, unsigned long, magma::Slice&, unsigned long&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/rw_file.cc:273
 #4  0x00000000009a7ec4 in magma::ReadAndTransform(magma::File*, long, unsigned long, std::function<magma::Status (char const*, unsigned long, std::unique_ptr<char [], std::default_delete<char []> >&, unsigned long&)>, std::unique_ptr<char [], std::default_delete<char []> >&, unsigned long&, unsigned long&, magma::BufferedFileReader*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/block_cache.cc:39
 #5  0x00000000009a80db in magma::Cache<magma::BlockCache::BlockID, magma::BlockCache::BlockData>::makeObject(magma::BlockCache::BlockID) ()
     at /opt/gcc-10.2.0/include/c++/10.2.0/bits/std_function.h:248
 #6  0x00000000009a6f85 in magma::Cache<magma::BlockCache::BlockID, magma::BlockCache::BlockData>::AcquireObject (this=this@entry=0x7f515c00b6c0, id=..., 
     doCaching=doCaching@entry=false)
     at /opt/gcc-10.2.0/include/c++/10.2.0/bits/std_function.h:248
 #7  0x000000000099ef29 in AcquireObject (doCaching=<optimized out>, id=..., 
     this=0x7f515c0e7c60)
     at /opt/gcc-10.2.0/include/c++/10.2.0/bits/std_function.h:248
 #8  Read (buffer=<optimized out>, transform=..., doCaching=<optimized out>, 
     readBytes=<optimized out>, outSize=<optimized out>, outData=..., 
     size=<optimized out>, offset=<optimized out>, fileID=<optimized out>, 
     file=<optimized out>, this=0x7f515c0e7c60)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/block_cache.h:60
 #9  magma::ManagedFile::Read(std::shared_ptr<magma::Cache<magma::ManagedFile*, magma::File>::ObjectHandleImpl> const&, long, unsigned long, std::shared_ptr<char const>&, unsigned long&, unsigned long&, magma::CacheReadMode, std::function<magma::Status (char const*, unsigned long, std::unique_ptr<char [], std::default_delete<char []> >&, unsigned long&)>, magma::BufferedFileReader*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/file_manager.cc:114
 #10 0x00000000009fd0ed in magma::SSTable::readBlock(std::shared_ptr<magma::Cache<magma::ManagedFile*, magma::File>::ObjectHandleImpl> const&, magma::BlockPointer const&, magma::Block*, magma::ReaderStats&, bool, magma::BufferedFileReader*) () at /opt/gcc-10.2.0/include/c++/10.2.0/new:175
 #11 0x0000000000a0004f in magma::SSTableIterator::initIterators(magma::Slice const&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/lsm/sstable/sstable.cc:764
 #12 0x0000000000a0072c in magma::SSTableIterator::Seek (this=0x7f515489af00, 
     key=...)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/lsm/sstable/sstable.cc:810
 #13 0x00000000009b5b45 in Next (this=0x7f515c039e00)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/lsm/iterator.cc:84
 #14 magma::MergeIterator::Next() ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/lsm/iterator.cc:81
 #15 0x00000000009c5358 in magma::KVReader::ReadKVs (this=0x7f515c039d40)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/lsm/common.cc:69
 #16 0x00000000009b57d7 in magma::SnapshotIterator::readKV() ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/lsm/iterator.cc:309
 #17 0x00000000009b5ae5 in magma::SnapshotIterator::Next (this=<optimized out>)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/lsm/iterator.cc:252
 #18 0x00000000009d3842 in Next (this=0x7f51561aad80)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/magma/kvstore/iterator.cc:171
 #19 magma::BySeqIterator::Next() ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/magma/kvstore/iterator.cc:169
 #20 0x00000000008707fa in MagmaKVStore::scan(BySeqnoScanContext&) const ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/kvstore/magma-kvstore/magma-kvstore.cc:1651
 #21 0x000000000073893f in WarmupVbucketVisitor::visit(VBucket&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/warmup.cc:541
 #22 0x00000000006e9c92 in KVBucket::pauseResumeVisit(PauseResumeVBVisitor&, KVBucketIface::Position&, VBucketFilter*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/kv_bucket.cc:2329
 #23 0x000000000074c120 in WarmupBackfillTask::run (this=0x7f515bf0cc10)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/warmup.cc:445
 #24 0x0000000000a6d9d2 in GlobalTask::execute() ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/globaltask.cc:68
 #25 0x0000000000a6abe5 in FollyExecutorPool::TaskProxy::scheduleViaCPUPool()::{lambda()#2}::operator()() const (__closure=0x7f51e4fe7840)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/folly_executorpool.cc:189
 #26 0x0000000000bbf750 in operator() (this=0x7f51e4fe7840)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/Function.h:416
 #27 folly::ThreadPoolExecutor::runTask(std::shared_ptr<folly::ThreadPoolExecutor::Thread> const&, folly::ThreadPoolExecutor::Task&&) (
     this=this@entry=0x7f51f112a800, thread=..., 
     task=task@entry=<unknown type in /usr/lib/debug/opt/couchbase/bin/memcached-7.1.0-1745.x86_64.debug, CU 0xa026ee0, DIE 0xa0aae15>)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/ThreadPoolExecutor.cpp:97
 #28 0x0000000000ba750a in folly::CPUThreadPoolExecutor::threadRun (
     this=0x7f51f112a800, thread=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/CPUThreadPoolExecutor.cpp:265
 #29 0x0000000000bc2709 in __invoke_impl<void, void (folly::ThreadPoolExecutor::*&)(std::shared_ptr<folly::ThreadPoolExecutor::Thread>), folly::ThreadPoolExecutor*&, std::shared_ptr<folly::ThreadPoolExecutor::Thread>&> (
     __t=<optimized out>, __f=<optimized out>)
     at /usr/local/include/c++/7.3.0/bits/invoke.h:73
 #30 __invoke<void (folly::ThreadPoolExecutor::*&)(std::shared_ptr<folly::ThreadPoolExecutor::Thread>), folly::ThreadPoolExecutor*&, std::shared_ptr<folly::ThreadPoolExecutor::Thread>&> (__fn=<optimized out>)
     at /usr/local/include/c++/7.3.0/bits/invoke.h:95
 #31 __call<void, 0, 1> (__args=<optimized out>, this=<optimized out>)
     at /usr/local/include/c++/7.3.0/functional:467
 #32 operator()<> (this=<optimized out>)
     at /usr/local/include/c++/7.3.0/functional:551
 #33 folly::detail::function::FunctionTraits<void ()>::callBig<std::_Bind<void (folly::ThreadPoolExecutor::*(folly::ThreadPoolExecutor*, std::shared_ptr<folly::ThreadPoolExecutor::Thread>))(std::shared_ptr<folly::ThreadPoolExecutor::Thread>)> >(folly::detail::function::Data&) (p=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/Function.h:401
 #34 0x0000000000a6a874 in operator() (this=0x7f51f10d5fc0)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/folly_executorpool.cc:47
 #35 operator() (__closure=0x7f51f10d5fc0)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/folly_executorpool.cc:47
 #36 folly::detail::function::FunctionTraits<void ()>::callBig<CBRegisteredThreadFactory::newThread(folly::Function<void ()>&&)::{lambda()#1}>(folly::detail::function::Data&) (p=...)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/Function.h:401
 #37 0x00007f51f315bd40 in execute_native_thread_routine ()
    from /opt/couchbase/bin/../lib/libstdc++.so.6
 #38 0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #39 0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 61 (Thread 0x7f51debff700 (LWP 128453)):
 #0  0x00007f51f4f6afc3 in pread64 () from /lib64/libpthread.so.0
 #1  0x0000000000996858 in magma::BasicFile::Read(long, unsigned long, char*, unsigned long*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/file/file_impl_linux.cc:145
 #2  0x00000000009f7f8a in magma::FileWithStats::Read(long, unsigned long, char*, unsigned long*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/file/file_impl_stats.cc:39
 #3  0x000000000099aae6 in magma::BufferedFileReader::Read(magma::File*, long, unsigned long, magma::Slice&, unsigned long&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/rw_file.cc:273
 #4  0x00000000009a7ec4 in magma::ReadAndTransform(magma::File*, long, unsigned long, std::function<magma::Status (char const*, unsigned long, std::unique_ptr<char [], std::default_delete<char []> >&, unsigned long&)>, std::unique_ptr<char [], std::default_delete<char []> >&, unsigned long&, unsigned long&, magma::BufferedFileReader*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/block_cache.cc:39
 #5  0x000000000099f0d2 in magma::ManagedFile::Read(std::shared_ptr<magma::Cache<magma::ManagedFile*, magma::File>::ObjectHandleImpl> const&, long, unsigned long, std::shared_ptr<char const>&, unsigned long&, unsigned long&, magma::CacheReadMode, std::function<magma::Status (char const*, unsigned long, std::unique_ptr<char [], std::default_delete<char []> >&, unsigned long&)>, magma::BufferedFileReader*) () at /opt/gcc-10.2.0/include/c++/10.2.0/bits/std_function.h:248
 #6  0x00000000009fd0ed in magma::SSTable::readBlock(std::shared_ptr<magma::Cache<magma::ManagedFile*, magma::File>::ObjectHandleImpl> const&, magma::BlockPointer const&, magma::Block*, magma::ReaderStats&, bool, magma::BufferedFileReader*) () at /opt/gcc-10.2.0/include/c++/10.2.0/new:175
 #7  0x0000000000a0004f in magma::SSTableIterator::initIterators(magma::Slice const&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/lsm/sstable/sstable.cc:764
 #8  0x00000000009b3fde in magma::JoinIterator::Next (this=0x7f515c03a340)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/lsm/iterator.cc:168
 #9  0x00000000009b5b45 in Next (this=0x7f515c03ae80)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/lsm/iterator.cc:84
 #10 magma::MergeIterator::Next() ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/lsm/iterator.cc:81
 #11 0x00000000009c5358 in magma::KVReader::ReadKVs (this=0x7f515c03a580)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/lsm/common.cc:69
 #12 0x00000000009b57d7 in magma::SnapshotIterator::readKV() ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/lsm/iterator.cc:309
 #13 0x00000000009b5ae5 in magma::SnapshotIterator::Next (this=<optimized out>)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/lsm/iterator.cc:252
 #14 0x00000000009d3842 in Next (this=0x7f5151107200)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/magma/kvstore/iterator.cc:171
 #15 magma::BySeqIterator::Next() ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/magma/kvstore/iterator.cc:169
 #16 0x00000000008707fa in MagmaKVStore::scan(BySeqnoScanContext&) const ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/kvstore/magma-kvstore/magma-kvstore.cc:1651
 #17 0x000000000073893f in WarmupVbucketVisitor::visit(VBucket&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/warmup.cc:541
 #18 0x00000000006e9c92 in KVBucket::pauseResumeVisit(PauseResumeVBVisitor&, KVBucketIface::Position&, VBucketFilter*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/kv_bucket.cc:2329
 #19 0x000000000074c120 in WarmupBackfillTask::run (this=0x7f515c1b5210)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/warmup.cc:445
 #20 0x0000000000a6d9d2 in GlobalTask::execute() ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/globaltask.cc:68
 #21 0x0000000000a6abe5 in FollyExecutorPool::TaskProxy::scheduleViaCPUPool()::{lambda()#2}::operator()() const (__closure=0x7f51debed840)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/folly_executorpool.cc:189
 #22 0x0000000000bbf750 in operator() (this=0x7f51debed840)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/Function.h:416
 #23 folly::ThreadPoolExecutor::runTask(std::shared_ptr<folly::ThreadPoolExecutor::Thread> const&, folly::ThreadPoolExecutor::Task&&) (
     this=this@entry=0x7f51f112a800, thread=..., 
     task=task@entry=<unknown type in /usr/lib/debug/opt/couchbase/bin/memcached-7.1.0-1745.x86_64.debug, CU 0xa026ee0, DIE 0xa0aae15>)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/ThreadPoolExecutor.cpp:97
 #24 0x0000000000ba750a in folly::CPUThreadPoolExecutor::threadRun (
     this=0x7f51f112a800, thread=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/CPUThreadPoolExecutor.cpp:265
 #25 0x0000000000bc2709 in __invoke_impl<void, void (folly::ThreadPoolExecutor::*&)(std::shared_ptr<folly::ThreadPoolExecutor::Thread>), folly::ThreadPoolExecutor*&, std::shared_ptr<folly::ThreadPoolExecutor::Thread>&> (
     __t=<optimized out>, __f=<optimized out>)
     at /usr/local/include/c++/7.3.0/bits/invoke.h:73
 #26 __invoke<void (folly::ThreadPoolExecutor::*&)(std::shared_ptr<folly::ThreadPoolExecutor::Thread>), folly::ThreadPoolExecutor*&, std::shared_ptr<folly::ThreadPoolExecutor::Thread>&> (__fn=<optimized out>)
     at /usr/local/include/c++/7.3.0/bits/invoke.h:95
 #27 __call<void, 0, 1> (__args=<optimized out>, this=<optimized out>)
     at /usr/local/include/c++/7.3.0/functional:467
 #28 operator()<> (this=<optimized out>)
     at /usr/local/include/c++/7.3.0/functional:551
 #29 folly::detail::function::FunctionTraits<void ()>::callBig<std::_Bind<void (folly::ThreadPoolExecutor::*(folly::ThreadPoolExecutor*, std::shared_ptr<folly::ThreadPoolExecutor::Thread>))(std::shared_ptr<folly::ThreadPoolExecutor::Thread>)> >(folly::detail::function::Data&) (p=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/Function.h:401
 #30 0x0000000000a6a874 in operator() (this=0x7f51f15e00c0)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/folly_executorpool.cc:47
 #31 operator() (__closure=0x7f51f15e00c0)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/folly_executorpool.cc:47
 #32 folly::detail::function::FunctionTraits<void ()>::callBig<CBRegisteredThreadFactory::newThread(folly::Function<void ()>&&)::{lambda()#1}>(folly::detail::function::Data&) (p=...)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/Function.h:401
 #33 0x00007f51f315bd40 in execute_native_thread_routine ()
    from /opt/couchbase/bin/../lib/libstdc++.so.6
 #34 0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #35 0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 60 (Thread 0x7f51de3fe700 (LWP 128454)):
 #0  0x00007f51f4f6afc3 in pread64 () from /lib64/libpthread.so.0
 #1  0x0000000000996858 in magma::BasicFile::Read(long, unsigned long, char*, unsigned long*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/file/file_impl_linux.cc:145
 #2  0x00000000009f7f8a in magma::FileWithStats::Read(long, unsigned long, char*, unsigned long*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/file/file_impl_stats.cc:39
 #3  0x000000000099aae6 in magma::BufferedFileReader::Read(magma::File*, long, unsigned long, magma::Slice&, unsigned long&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/rw_file.cc:273
 #4  0x00000000009a7ec4 in magma::ReadAndTransform(magma::File*, long, unsigned long, std::function<magma::Status (char const*, unsigned long, std::unique_ptr<char [], std::default_delete<char []> >&, unsigned long&)>, std::unique_ptr<char [], std::default_delete<char []> >&, unsigned long&, unsigned long&, magma::BufferedFileReader*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/block_cache.cc:39
 #5  0x000000000099f0d2 in magma::ManagedFile::Read(std::shared_ptr<magma::Cache<magma::ManagedFile*, magma::File>::ObjectHandleImpl> const&, long, unsigned long, std::shared_ptr<char const>&, unsigned long&, unsigned long&, magma::CacheReadMode, std::function<magma::Status (char const*, unsigned long, std::unique_ptr<char [], std::default_delete<char []> >&, unsigned long&)>, magma::BufferedFileReader*) () at /opt/gcc-10.2.0/include/c++/10.2.0/bits/std_function.h:248
 #6  0x00000000009fd0ed in magma::SSTable::readBlock(std::shared_ptr<magma::Cache<magma::ManagedFile*, magma::File>::ObjectHandleImpl> const&, magma::BlockPointer const&, magma::Block*, magma::ReaderStats&, bool, magma::BufferedFileReader*) () at /opt/gcc-10.2.0/include/c++/10.2.0/new:175
 #7  0x0000000000a0004f in magma::SSTableIterator::initIterators(magma::Slice const&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/lsm/sstable/sstable.cc:764
 #8  0x0000000000a0072c in magma::SSTableIterator::Seek (this=0x7f515489a000, 
     key=...)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/lsm/sstable/sstable.cc:810
 #9  0x00000000009b5f9b in magma::MergeIterator::Seek (this=0x7f5150cf85c0, 
     key=...)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/lsm/iterator.cc:69
 #10 0x00000000009b5aca in magma::SnapshotIterator::Seek (
     this=this@entry=0x7f5148e48100, key=...)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/lsm/iterator.cc:243
 #11 0x00000000009d39f6 in magma::BySeqIterator::Seek(unsigned long, unsigned long) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/magma/kvstore/iterator.cc:62
 #12 0x000000000087069d in MagmaKVStore::scan(BySeqnoScanContext&) const ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/kvstore/magma-kvstore/magma-kvstore.cc:1650
 #13 0x000000000073893f in WarmupVbucketVisitor::visit(VBucket&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/warmup.cc:541
 #14 0x00000000006e9c92 in KVBucket::pauseResumeVisit(PauseResumeVBVisitor&, KVBucketIface::Position&, VBucketFilter*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/kv_bucket.cc:2329
 #15 0x000000000074c120 in WarmupBackfillTask::run (this=0x7f51564cec10)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/warmup.cc:445
 #16 0x0000000000a6d9d2 in GlobalTask::execute() ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/globaltask.cc:68
 #17 0x0000000000a6abe5 in FollyExecutorPool::TaskProxy::scheduleViaCPUPool()::{lambda()#2}::operator()() const (__closure=0x7f51de3ec840)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/folly_executorpool.cc:189
 #18 0x0000000000bbf750 in operator() (this=0x7f51de3ec840)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/Function.h:416
 #19 folly::ThreadPoolExecutor::runTask(std::shared_ptr<folly::ThreadPoolExecutor::Thread> const&, folly::ThreadPoolExecutor::Task&&) (
     this=this@entry=0x7f51f112a800, thread=..., 
     task=task@entry=<unknown type in /usr/lib/debug/opt/couchbase/bin/memcached-7.1.0-1745.x86_64.debug, CU 0xa026ee0, DIE 0xa0aae15>)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/ThreadPoolExecutor.cpp:97
 #20 0x0000000000ba750a in folly::CPUThreadPoolExecutor::threadRun (
     this=0x7f51f112a800, thread=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/CPUThreadPoolExecutor.cpp:265
 #21 0x0000000000bc2709 in __invoke_impl<void, void (folly::ThreadPoolExecutor::*&)(std::shared_ptr<folly::ThreadPoolExecutor::Thread>), folly::ThreadPoolExecutor*&, std::shared_ptr<folly::ThreadPoolExecutor::Thread>&> (
     __t=<optimized out>, __f=<optimized out>)
     at /usr/local/include/c++/7.3.0/bits/invoke.h:73
 #22 __invoke<void (folly::ThreadPoolExecutor::*&)(std::shared_ptr<folly::ThreadPoolExecutor::Thread>), folly::ThreadPoolExecutor*&, std::shared_ptr<folly::ThreadPoolExecutor::Thread>&> (__fn=<optimized out>)
     at /usr/local/include/c++/7.3.0/bits/invoke.h:95
 #23 __call<void, 0, 1> (__args=<optimized out>, this=<optimized out>)
     at /usr/local/include/c++/7.3.0/functional:467
 #24 operator()<> (this=<optimized out>)
     at /usr/local/include/c++/7.3.0/functional:551
 #25 folly::detail::function::FunctionTraits<void ()>::callBig<std::_Bind<void (folly::ThreadPoolExecutor::*(folly::ThreadPoolExecutor*, std::shared_ptr<folly::ThreadPoolExecutor::Thread>))(std::shared_ptr<folly::ThreadPoolExecutor::Thread>)> >(folly::detail::function::Data&) (p=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/Function.h:401
 #26 0x0000000000a6a874 in operator() (this=0x7f51f15e0100)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/folly_executorpool.cc:47
 #27 operator() (__closure=0x7f51f15e0100)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/folly_executorpool.cc:47
 #28 folly::detail::function::FunctionTraits<void ()>::callBig<CBRegisteredThreadFactory::newThread(folly::Function<void ()>&&)::{lambda()#1}>(folly::detail::function::Data&) (p=...)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/Function.h:401
 #29 0x00007f51f315bd40 in execute_native_thread_routine ()
    from /opt/couchbase/bin/../lib/libstdc++.so.6
 #30 0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #31 0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 59 (Thread 0x7f51ddbfd700 (LWP 128455)):
 #0  0x00007f51f4f6afc3 in pread64 () from /lib64/libpthread.so.0
 #1  0x0000000000996858 in magma::BasicFile::Read(long, unsigned long, char*, unsigned long*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/file/file_impl_linux.cc:145
 #2  0x00000000009f7f8a in magma::FileWithStats::Read(long, unsigned long, char*, unsigned long*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/file/file_impl_stats.cc:39
 #3  0x000000000099aae6 in magma::BufferedFileReader::Read(magma::File*, long, unsigned long, magma::Slice&, unsigned long&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/rw_file.cc:273
 #4  0x00000000009a7ec4 in magma::ReadAndTransform(magma::File*, long, unsigned long, std::function<magma::Status (char const*, unsigned long, std::unique_ptr<char [], std::default_delete<char []> >&, unsigned long&)>, std::unique_ptr<char [], std::default_delete<char []> >&, unsigned long&, unsigned long&, magma::BufferedFileReader*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/block_cache.cc:39
 #5  0x000000000099f0d2 in magma::ManagedFile::Read(std::shared_ptr<magma::Cache<magma::ManagedFile*, magma::File>::ObjectHandleImpl> const&, long, unsigned long, std::shared_ptr<char const>&, unsigned long&, unsigned long&, magma::CacheReadMode, std::function<magma::Status (char const*, unsigned long, std::unique_ptr<char [], std::default_delete<char []> >&, unsigned long&)>, magma::BufferedFileReader*) () at /opt/gcc-10.2.0/include/c++/10.2.0/bits/std_function.h:248
 #6  0x00000000009fd0ed in magma::SSTable::readBlock(std::shared_ptr<magma::Cache<magma::ManagedFile*, magma::File>::ObjectHandleImpl> const&, magma::BlockPointer const&, magma::Block*, magma::ReaderStats&, bool, magma::BufferedFileReader*) () at /opt/gcc-10.2.0/include/c++/10.2.0/new:175
 #7  0x0000000000a0004f in magma::SSTableIterator::initIterators(magma::Slice const&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/lsm/sstable/sstable.cc:764
 #8  0x0000000000a0072c in magma::SSTableIterator::Seek (this=0x7f51546e8e80, 
     key=...)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/lsm/sstable/sstable.cc:810
 #9  0x00000000009b5f9b in magma::MergeIterator::Seek (this=0x7f515c039140, 
     key=...)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/lsm/iterator.cc:69
 #10 0x00000000009b5aca in magma::SnapshotIterator::Seek (
     this=this@entry=0x7f5148e03c80, key=...)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/lsm/iterator.cc:243
 #11 0x00000000009d39f6 in magma::BySeqIterator::Seek(unsigned long, unsigned long) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/magma/kvstore/iterator.cc:62
 #12 0x000000000087069d in MagmaKVStore::scan(BySeqnoScanContext&) const ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/kvstore/magma-kvstore/magma-kvstore.cc:1650
 #13 0x000000000073893f in WarmupVbucketVisitor::visit(VBucket&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/warmup.cc:541
 #14 0x00000000006e9c92 in KVBucket::pauseResumeVisit(PauseResumeVBVisitor&, KVBucketIface::Position&, VBucketFilter*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/kv_bucket.cc:2329
 #15 0x000000000074c120 in WarmupBackfillTask::run (this=0x7f515c1b5310)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/warmup.cc:445
 #16 0x0000000000a6d9d2 in GlobalTask::execute() ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/globaltask.cc:68
 #17 0x0000000000a6abe5 in FollyExecutorPool::TaskProxy::scheduleViaCPUPool()::{lambda()#2}::operator()() const (__closure=0x7f51ddbeb840)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/folly_executorpool.cc:189
 #18 0x0000000000bbf750 in operator() (this=0x7f51ddbeb840)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/Function.h:416
 #19 folly::ThreadPoolExecutor::runTask(std::shared_ptr<folly::ThreadPoolExecutor::Thread> const&, folly::ThreadPoolExecutor::Task&&) (
     this=this@entry=0x7f51f112a800, thread=..., 
     task=task@entry=<unknown type in /usr/lib/debug/opt/couchbase/bin/memcached-7.1.0-1745.x86_64.debug, CU 0xa026ee0, DIE 0xa0aae15>)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/ThreadPoolExecutor.cpp:97
 #20 0x0000000000ba750a in folly::CPUThreadPoolExecutor::threadRun (
     this=0x7f51f112a800, thread=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/CPUThreadPoolExecutor.cpp:265
 #21 0x0000000000bc2709 in __invoke_impl<void, void (folly::ThreadPoolExecutor::*&)(std::shared_ptr<folly::ThreadPoolExecutor::Thread>), folly::ThreadPoolExecutor*&, std::shared_ptr<folly::ThreadPoolExecutor::Thread>&> (
     __t=<optimized out>, __f=<optimized out>)
     at /usr/local/include/c++/7.3.0/bits/invoke.h:73
 #22 __invoke<void (folly::ThreadPoolExecutor::*&)(std::shared_ptr<folly::ThreadPoolExecutor::Thread>), folly::ThreadPoolExecutor*&, std::shared_ptr<folly::ThreadPoolExecutor::Thread>&> (__fn=<optimized out>)
     at /usr/local/include/c++/7.3.0/bits/invoke.h:95
 #23 __call<void, 0, 1> (__args=<optimized out>, this=<optimized out>)
     at /usr/local/include/c++/7.3.0/functional:467
 #24 operator()<> (this=<optimized out>)
     at /usr/local/include/c++/7.3.0/functional:551
 #25 folly::detail::function::FunctionTraits<void ()>::callBig<std::_Bind<void (folly::ThreadPoolExecutor::*(folly::ThreadPoolExecutor*, std::shared_ptr<folly::ThreadPoolExecutor::Thread>))(std::shared_ptr<folly::ThreadPoolExecutor::Thread>)> >(folly::detail::function::Data&) (p=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/Function.h:401
 #26 0x0000000000a6a874 in operator() (this=0x7f51f15e0180)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/folly_executorpool.cc:47
 #27 operator() (__closure=0x7f51f15e0180)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/folly_executorpool.cc:47
 #28 folly::detail::function::FunctionTraits<void ()>::callBig<CBRegisteredThreadFactory::newThread(folly::Function<void ()>&&)::{lambda()#1}>(folly::detail::function::Data&) (p=...)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/Function.h:401
 #29 0x00007f51f315bd40 in execute_native_thread_routine ()
    from /opt/couchbase/bin/../lib/libstdc++.so.6
 #30 0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #31 0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 58 (Thread 0x7f51dd3fc700 (LWP 128456)):
 #0  0x00007f51f4f6afc3 in pread64 () from /lib64/libpthread.so.0
 #1  0x0000000000996858 in magma::BasicFile::Read(long, unsigned long, char*, unsigned long*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/file/file_impl_linux.cc:145
 #2  0x00000000009f7f8a in magma::FileWithStats::Read(long, unsigned long, char*, unsigned long*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/file/file_impl_stats.cc:39
 #3  0x000000000099aae6 in magma::BufferedFileReader::Read(magma::File*, long, unsigned long, magma::Slice&, unsigned long&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/rw_file.cc:273
 #4  0x00000000009a7ec4 in magma::ReadAndTransform(magma::File*, long, unsigned long, std::function<magma::Status (char const*, unsigned long, std::unique_ptr<char [], std::default_delete<char []> >&, unsigned long&)>, std::unique_ptr<char [], std::default_delete<char []> >&, unsigned long&, unsigned long&, magma::BufferedFileReader*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/block_cache.cc:39
 #5  0x000000000099f0d2 in magma::ManagedFile::Read(std::shared_ptr<magma::Cache<magma::ManagedFile*, magma::File>::ObjectHandleImpl> const&, long, unsigned long, std::shared_ptr<char const>&, unsigned long&, unsigned long&, magma::CacheReadMode, std::function<magma::Status (char const*, unsigned long, std::unique_ptr<char [], std::default_delete<char []> >&, unsigned long&)>, magma::BufferedFileReader*) () at /opt/gcc-10.2.0/include/c++/10.2.0/bits/std_function.h:248
 #6  0x00000000009fd0ed in magma::SSTable::readBlock(std::shared_ptr<magma::Cache<magma::ManagedFile*, magma::File>::ObjectHandleImpl> const&, magma::BlockPointer const&, magma::Block*, magma::ReaderStats&, bool, magma::BufferedFileReader*) () at /opt/gcc-10.2.0/include/c++/10.2.0/new:175
 #7  0x0000000000a0004f in magma::SSTableIterator::initIterators(magma::Slice const&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/lsm/sstable/sstable.cc:764
 #8  0x00000000009b3fde in magma::JoinIterator::Next (this=0x7f515be2d340)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/lsm/iterator.cc:168
 #9  0x00000000009b5b45 in Next (this=0x7f5150cf8140)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/lsm/iterator.cc:84
 #10 magma::MergeIterator::Next() ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/lsm/iterator.cc:81
 #11 0x00000000009c5358 in magma::KVReader::ReadKVs (this=0x7f515be2df40)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/lsm/common.cc:69
 #12 0x00000000009b57d7 in magma::SnapshotIterator::readKV() ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/lsm/iterator.cc:309
 #13 0x00000000009b5ae5 in magma::SnapshotIterator::Next (this=<optimized out>)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/lsm/iterator.cc:252
 #14 0x00000000009d3842 in Next (this=0x7f5150ba3500)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/magma/kvstore/iterator.cc:171
 #15 magma::BySeqIterator::Next() ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/magma/kvstore/iterator.cc:169
 #16 0x00000000008707fa in MagmaKVStore::scan(BySeqnoScanContext&) const ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/kvstore/magma-kvstore/magma-kvstore.cc:1651
 #17 0x000000000073893f in WarmupVbucketVisitor::visit(VBucket&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/warmup.cc:541
 #18 0x00000000006e9c92 in KVBucket::pauseResumeVisit(PauseResumeVBVisitor&, KVBucketIface::Position&, VBucketFilter*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/kv_bucket.cc:2329
 #19 0x000000000074c120 in WarmupBackfillTask::run (this=0x7f515bf0ce10)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/warmup.cc:445
 #20 0x0000000000a6d9d2 in GlobalTask::execute() ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/globaltask.cc:68
 #21 0x0000000000a6abe5 in FollyExecutorPool::TaskProxy::scheduleViaCPUPool()::{lambda()#2}::operator()() const (__closure=0x7f51dd3ea840)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/folly_executorpool.cc:189
 #22 0x0000000000bbf750 in operator() (this=0x7f51dd3ea840)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/Function.h:416
 #23 folly::ThreadPoolExecutor::runTask(std::shared_ptr<folly::ThreadPoolExecutor::Thread> const&, folly::ThreadPoolExecutor::Task&&) (
     this=this@entry=0x7f51f112a800, thread=..., 
     task=task@entry=<unknown type in /usr/lib/debug/opt/couchbase/bin/memcached-7.1.0-1745.x86_64.debug, CU 0xa026ee0, DIE 0xa0aae15>)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/ThreadPoolExecutor.cpp:97
 #24 0x0000000000ba750a in folly::CPUThreadPoolExecutor::threadRun (
     this=0x7f51f112a800, thread=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/CPUThreadPoolExecutor.cpp:265
 #25 0x0000000000bc2709 in __invoke_impl<void, void (folly::ThreadPoolExecutor::*&)(std::shared_ptr<folly::ThreadPoolExecutor::Thread>), folly::ThreadPoolExecutor*&, std::shared_ptr<folly::ThreadPoolExecutor::Thread>&> (
     __t=<optimized out>, __f=<optimized out>)
     at /usr/local/include/c++/7.3.0/bits/invoke.h:73
 #26 __invoke<void (folly::ThreadPoolExecutor::*&)(std::shared_ptr<folly::ThreadPoolExecutor::Thread>), folly::ThreadPoolExecutor*&, std::shared_ptr<folly::ThreadPoolExecutor::Thread>&> (__fn=<optimized out>)
     at /usr/local/include/c++/7.3.0/bits/invoke.h:95
 #27 __call<void, 0, 1> (__args=<optimized out>, this=<optimized out>)
     at /usr/local/include/c++/7.3.0/functional:467
 #28 operator()<> (this=<optimized out>)
     at /usr/local/include/c++/7.3.0/functional:551
 #29 folly::detail::function::FunctionTraits<void ()>::callBig<std::_Bind<void (folly::ThreadPoolExecutor::*(folly::ThreadPoolExecutor*, std::shared_ptr<folly::ThreadPoolExecutor::Thread>))(std::shared_ptr<folly::ThreadPoolExecutor::Thread>)> >(folly::detail::function::Data&) (p=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/Function.h:401
 #30 0x0000000000a6a874 in operator() (this=0x7f51f15e01c0)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/folly_executorpool.cc:47
 #31 operator() (__closure=0x7f51f15e01c0)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/folly_executorpool.cc:47
 #32 folly::detail::function::FunctionTraits<void ()>::callBig<CBRegisteredThreadFactory::newThread(folly::Function<void ()>&&)::{lambda()#1}>(folly::detail::function::Data&) (p=...)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/Function.h:401
 #33 0x00007f51f315bd40 in execute_native_thread_routine ()
    from /opt/couchbase/bin/../lib/libstdc++.so.6
 #34 0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #35 0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 57 (Thread 0x7f51dcbfb700 (LWP 128457)):
 #0  0x00007fff6295c6c2 in clock_gettime ()
 #1  0x00007f51f28ba7fd in clock_gettime () from /lib64/libc.so.6
 #2  0x00007f51f3153ca1 in std::chrono::_V2::steady_clock::now() ()
    from /opt/couchbase/bin/../lib/libstdc++.so.6
 #3  0x000000000073a752 in LoadStorageKVPairCallback::callback(GetValue&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/warmup.cc:950
 #4  0x0000000000870763 in MagmaKVStore::scan(BySeqnoScanContext&) const ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/kvstore/kvstore.h:389
 #5  0x000000000073893f in WarmupVbucketVisitor::visit(VBucket&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/warmup.cc:541
 #6  0x00000000006e9c92 in KVBucket::pauseResumeVisit(PauseResumeVBVisitor&, KVBucketIface::Position&, VBucketFilter*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/kv_bucket.cc:2329
 #7  0x000000000074c120 in WarmupBackfillTask::run (this=0x7f515bf0cd10)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/warmup.cc:445
 #8  0x0000000000a6d9d2 in GlobalTask::execute() ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/globaltask.cc:68
 #9  0x0000000000a6abe5 in FollyExecutorPool::TaskProxy::scheduleViaCPUPool()::{lambda()#2}::operator()() const (__closure=0x7f51dcbe9840)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/folly_executorpool.cc:189
 #10 0x0000000000bbf750 in operator() (this=0x7f51dcbe9840)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/Function.h:416
 #11 folly::ThreadPoolExecutor::runTask(std::shared_ptr<folly::ThreadPoolExecutor::Thread> const&, folly::ThreadPoolExecutor::Task&&) (
     this=this@entry=0x7f51f112a800, thread=..., 
     task=task@entry=<unknown type in /usr/lib/debug/opt/couchbase/bin/memcached-7.1.0-1745.x86_64.debug, CU 0xa026ee0, DIE 0xa0aae15>)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/ThreadPoolExecutor.cpp:97
 #12 0x0000000000ba750a in folly::CPUThreadPoolExecutor::threadRun (
     this=0x7f51f112a800, thread=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/CPUThreadPoolExecutor.cpp:265
 #13 0x0000000000bc2709 in __invoke_impl<void, void (folly::ThreadPoolExecutor::*&)(std::shared_ptr<folly::ThreadPoolExecutor::Thread>), folly::ThreadPoolExecutor*&, std::shared_ptr<folly::ThreadPoolExecutor::Thread>&> (
     __t=<optimized out>, __f=<optimized out>)
     at /usr/local/include/c++/7.3.0/bits/invoke.h:73
 #14 __invoke<void (folly::ThreadPoolExecutor::*&)(std::shared_ptr<folly::ThreadPoolExecutor::Thread>), folly::ThreadPoolExecutor*&, std::shared_ptr<folly::ThreadPoolExecutor::Thread>&> (__fn=<optimized out>)
     at /usr/local/include/c++/7.3.0/bits/invoke.h:95
 #15 __call<void, 0, 1> (__args=<optimized out>, this=<optimized out>)
     at /usr/local/include/c++/7.3.0/functional:467
 #16 operator()<> (this=<optimized out>)
     at /usr/local/include/c++/7.3.0/functional:551
 #17 folly::detail::function::FunctionTraits<void ()>::callBig<std::_Bind<void (folly::ThreadPoolExecutor::*(folly::ThreadPoolExecutor*, std::shared_ptr<folly::ThreadPoolExecutor::Thread>))(std::shared_ptr<folly::ThreadPoolExecutor::Thread>)> >(folly::detail::function::Data&) (p=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/Function.h:401
 #18 0x0000000000a6a874 in operator() (this=0x7f51f15e0140)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/folly_executorpool.cc:47
 #19 operator() (__closure=0x7f51f15e0140)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/folly_executorpool.cc:47
 #20 folly::detail::function::FunctionTraits<void ()>::callBig<CBRegisteredThreadFactory::newThread(folly::Function<void ()>&&)::{lambda()#1}>(folly::detail::function::Data&) (p=...)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/Function.h:401
 #21 0x00007f51f315bd40 in execute_native_thread_routine ()
    from /opt/couchbase/bin/../lib/libstdc++.so.6
 #22 0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #23 0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 56 (Thread 0x7f51d27da700 (LWP 128458)):
 #0  0x00007f51f4f6afc3 in pread64 () from /lib64/libpthread.so.0
 #1  0x0000000000996858 in magma::BasicFile::Read(long, unsigned long, char*, unsigned long*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/file/file_impl_linux.cc:145
 #2  0x00000000009f7f8a in magma::FileWithStats::Read(long, unsigned long, char*, unsigned long*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/file/file_impl_stats.cc:39
 #3  0x000000000099aae6 in magma::BufferedFileReader::Read(magma::File*, long, unsigned long, magma::Slice&, unsigned long&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/rw_file.cc:273
 #4  0x00000000009a7ec4 in magma::ReadAndTransform(magma::File*, long, unsigned long, std::function<magma::Status (char const*, unsigned long, std::unique_ptr<char [], std::default_delete<char []> >&, unsigned long&)>, std::unique_ptr<char [], std::default_delete<char []> >&, unsigned long&, unsigned long&, magma::BufferedFileReader*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/block_cache.cc:39
 #5  0x000000000099f0d2 in magma::ManagedFile::Read(std::shared_ptr<magma::Cache<magma::ManagedFile*, magma::File>::ObjectHandleImpl> const&, long, unsigned long, std::shared_ptr<char const>&, unsigned long&, unsigned long&, magma::CacheReadMode, std::function<magma::Status (char const*, unsigned long, std::unique_ptr<char [], std::default_delete<char []> >&, unsigned long&)>, magma::BufferedFileReader*) () at /opt/gcc-10.2.0/include/c++/10.2.0/bits/std_function.h:248
 #6  0x00000000009fd0ed in magma::SSTable::readBlock(std::shared_ptr<magma::Cache<magma::ManagedFile*, magma::File>::ObjectHandleImpl> const&, magma::BlockPointer const&, magma::Block*, magma::ReaderStats&, bool, magma::BufferedFileReader*) () at /opt/gcc-10.2.0/include/c++/10.2.0/new:175
 #7  0x0000000000a0004f in magma::SSTableIterator::initIterators(magma::Slice const&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/lsm/sstable/sstable.cc:764
 #8  0x0000000000a0072c in magma::SSTableIterator::Seek (this=0x7f515538ea00, 
     key=...)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/lsm/sstable/sstable.cc:810
 #9  0x00000000009b5f9b in magma::MergeIterator::Seek (this=0x7f5150cbbf40, 
     key=...)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/lsm/iterator.cc:69
 #10 0x00000000009b5aca in magma::SnapshotIterator::Seek (
     this=this@entry=0x7f5153011380, key=...)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/lsm/iterator.cc:243
 #11 0x00000000009d39f6 in magma::BySeqIterator::Seek(unsigned long, unsigned long) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/magma/kvstore/iterator.cc:62
 #12 0x000000000087069d in MagmaKVStore::scan(BySeqnoScanContext&) const ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/kvstore/magma-kvstore/magma-kvstore.cc:1650
 #13 0x000000000073893f in WarmupVbucketVisitor::visit(VBucket&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/warmup.cc:541
 #14 0x00000000006e9c92 in KVBucket::pauseResumeVisit(PauseResumeVBVisitor&, KVBucketIface::Position&, VBucketFilter*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/kv_bucket.cc:2329
 #15 0x000000000074c120 in WarmupBackfillTask::run (this=0x7f5156199110)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/warmup.cc:445
 #16 0x0000000000a6d9d2 in GlobalTask::execute() ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/globaltask.cc:68
 #17 0x0000000000a6abe5 in FollyExecutorPool::TaskProxy::scheduleViaCPUPool()::{lambda()#2}::operator()() const (__closure=0x7f51d27c8840)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/folly_executorpool.cc:189
 #18 0x0000000000bbf750 in operator() (this=0x7f51d27c8840)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/Function.h:416
 #19 folly::ThreadPoolExecutor::runTask(std::shared_ptr<folly::ThreadPoolExecutor::Thread> const&, folly::ThreadPoolExecutor::Task&&) (
     this=this@entry=0x7f51f112a800, thread=..., 
     task=task@entry=<unknown type in /usr/lib/debug/opt/couchbase/bin/memcached-7.1.0-1745.x86_64.debug, CU 0xa026ee0, DIE 0xa0aae15>)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/ThreadPoolExecutor.cpp:97
 #20 0x0000000000ba750a in folly::CPUThreadPoolExecutor::threadRun (
     this=0x7f51f112a800, thread=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/CPUThreadPoolExecutor.cpp:265
 #21 0x0000000000bc2709 in __invoke_impl<void, void (folly::ThreadPoolExecutor::*&)(std::shared_ptr<folly::ThreadPoolExecutor::Thread>), folly::ThreadPoolExecutor*&, std::shared_ptr<folly::ThreadPoolExecutor::Thread>&> (
     __t=<optimized out>, __f=<optimized out>)
     at /usr/local/include/c++/7.3.0/bits/invoke.h:73
 #22 __invoke<void (folly::ThreadPoolExecutor::*&)(std::shared_ptr<folly::ThreadPoolExecutor::Thread>), folly::ThreadPoolExecutor*&, std::shared_ptr<folly::ThreadPoolExecutor::Thread>&> (__fn=<optimized out>)
     at /usr/local/include/c++/7.3.0/bits/invoke.h:95
 #23 __call<void, 0, 1> (__args=<optimized out>, this=<optimized out>)
     at /usr/local/include/c++/7.3.0/functional:467
 #24 operator()<> (this=<optimized out>)
     at /usr/local/include/c++/7.3.0/functional:551
 #25 folly::detail::function::FunctionTraits<void ()>::callBig<std::_Bind<void (folly::ThreadPoolExecutor::*(folly::ThreadPoolExecutor*, std::shared_ptr<folly::ThreadPoolExecutor::Thread>))(std::shared_ptr<folly::ThreadPoolExecutor::Thread>)> >(folly::detail::function::Data&) (p=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/Function.h:401
 #26 0x0000000000a6a874 in operator() (this=0x7f51f15e0200)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/folly_executorpool.cc:47
 #27 operator() (__closure=0x7f51f15e0200)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/folly_executorpool.cc:47
 #28 folly::detail::function::FunctionTraits<void ()>::callBig<CBRegisteredThreadFactory::newThread(folly::Function<void ()>&&)::{lambda()#1}>(folly::detail::function::Data&) (p=...)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/Function.h:401
 #29 0x00007f51f315bd40 in execute_native_thread_routine ()
    from /opt/couchbase/bin/../lib/libstdc++.so.6
 #30 0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #31 0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 55 (Thread 0x7f51d1fd9700 (LWP 128459)):
 #0  0x00007f51f4f6afc3 in pread64 () from /lib64/libpthread.so.0
 #1  0x0000000000996858 in magma::BasicFile::Read(long, unsigned long, char*, unsigned long*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/file/file_impl_linux.cc:145
 #2  0x00000000009f7f8a in magma::FileWithStats::Read(long, unsigned long, char*, unsigned long*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/file/file_impl_stats.cc:39
 #3  0x000000000099aae6 in magma::BufferedFileReader::Read(magma::File*, long, unsigned long, magma::Slice&, unsigned long&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/rw_file.cc:273
 #4  0x00000000009a7ec4 in magma::ReadAndTransform(magma::File*, long, unsigned long, std::function<magma::Status (char const*, unsigned long, std::unique_ptr<char [], std::default_delete<char []> >&, unsigned long&)>, std::unique_ptr<char [], std::default_delete<char []> >&, unsigned long&, unsigned long&, magma::BufferedFileReader*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/block_cache.cc:39
 #5  0x000000000099f0d2 in magma::ManagedFile::Read(std::shared_ptr<magma::Cache<magma::ManagedFile*, magma::File>::ObjectHandleImpl> const&, long, unsigned long, std::shared_ptr<char const>&, unsigned long&, unsigned long&, magma::CacheReadMode, std::function<magma::Status (char const*, unsigned long, std::unique_ptr<char [], std::default_delete<char []> >&, unsigned long&)>, magma::BufferedFileReader*) () at /opt/gcc-10.2.0/include/c++/10.2.0/bits/std_function.h:248
 #6  0x00000000009fd0ed in magma::SSTable::readBlock(std::shared_ptr<magma::Cache<magma::ManagedFile*, magma::File>::ObjectHandleImpl> const&, magma::BlockPointer const&, magma::Block*, magma::ReaderStats&, bool, magma::BufferedFileReader*) () at /opt/gcc-10.2.0/include/c++/10.2.0/new:175
 #7  0x0000000000a0004f in magma::SSTableIterator::initIterators(magma::Slice const&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/lsm/sstable/sstable.cc:764
 #8  0x00000000009b3fde in magma::JoinIterator::Next (this=0x7f51564c7640)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/lsm/iterator.cc:168
 #9  0x00000000009b5b45 in Next (this=0x7f5149af6880)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/lsm/iterator.cc:84
 #10 magma::MergeIterator::Next() ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/lsm/iterator.cc:81
 #11 0x00000000009c5358 in magma::KVReader::ReadKVs (this=0x7f51564c77c0)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/lsm/common.cc:69
 #12 0x00000000009b57d7 in magma::SnapshotIterator::readKV() ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/lsm/iterator.cc:309
 #13 0x00000000009b5ae5 in magma::SnapshotIterator::Next (this=<optimized out>)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/lsm/iterator.cc:252
 #14 0x00000000009d3842 in Next (this=0x7f5154ebcc00)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/magma/kvstore/iterator.cc:171
 #15 magma::BySeqIterator::Next() ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/magma/kvstore/iterator.cc:169
 #16 0x00000000008707fa in MagmaKVStore::scan(BySeqnoScanContext&) const ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/kvstore/magma-kvstore/magma-kvstore.cc:1651
 #17 0x000000000073893f in WarmupVbucketVisitor::visit(VBucket&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/warmup.cc:541
 #18 0x00000000006e9c92 in KVBucket::pauseResumeVisit(PauseResumeVBVisitor&, KVBucketIface::Position&, VBucketFilter*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/kv_bucket.cc:2329
 #19 0x000000000074c120 in WarmupBackfillTask::run (this=0x7f51564ce610)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/warmup.cc:445
 #20 0x0000000000a6d9d2 in GlobalTask::execute() ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/globaltask.cc:68
 #21 0x0000000000a6abe5 in FollyExecutorPool::TaskProxy::scheduleViaCPUPool()::{lambda()#2}::operator()() const (__closure=0x7f51d1fc7840)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/folly_executorpool.cc:189
 #22 0x0000000000bbf750 in operator() (this=0x7f51d1fc7840)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/Function.h:416
 #23 folly::ThreadPoolExecutor::runTask(std::shared_ptr<folly::ThreadPoolExecutor::Thread> const&, folly::ThreadPoolExecutor::Task&&) (
     this=this@entry=0x7f51f112a800, thread=..., 
     task=task@entry=<unknown type in /usr/lib/debug/opt/couchbase/bin/memcached-7.1.0-1745.x86_64.debug, CU 0xa026ee0, DIE 0xa0aae15>)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/ThreadPoolExecutor.cpp:97
 #24 0x0000000000ba750a in folly::CPUThreadPoolExecutor::threadRun (
     this=0x7f51f112a800, thread=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/CPUThreadPoolExecutor.cpp:265
 #25 0x0000000000bc2709 in __invoke_impl<void, void (folly::ThreadPoolExecutor::*&)(std::shared_ptr<folly::ThreadPoolExecutor::Thread>), folly::ThreadPoolExecutor*&, std::shared_ptr<folly::ThreadPoolExecutor::Thread>&> (
     __t=<optimized out>, __f=<optimized out>)
     at /usr/local/include/c++/7.3.0/bits/invoke.h:73
 #26 __invoke<void (folly::ThreadPoolExecutor::*&)(std::shared_ptr<folly::ThreadPoolExecutor::Thread>), folly::ThreadPoolExecutor*&, std::shared_ptr<folly::ThreadPoolExecutor::Thread>&> (__fn=<optimized out>)
     at /usr/local/include/c++/7.3.0/bits/invoke.h:95
 #27 __call<void, 0, 1> (__args=<optimized out>, this=<optimized out>)
     at /usr/local/include/c++/7.3.0/functional:467
 #28 operator()<> (this=<optimized out>)
     at /usr/local/include/c++/7.3.0/functional:551
 #29 folly::detail::function::FunctionTraits<void ()>::callBig<std::_Bind<void (folly::ThreadPoolExecutor::*(folly::ThreadPoolExecutor*, std::shared_ptr<folly::ThreadPoolExecutor::Thread>))(std::shared_ptr<folly::ThreadPoolExecutor::Thread>)> >(folly::detail::function::Data&) (p=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/Function.h:401
 #30 0x0000000000a6a874 in operator() (this=0x7f51f15e0240)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/folly_executorpool.cc:47
 #31 operator() (__closure=0x7f51f15e0240)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/folly_executorpool.cc:47
 #32 folly::detail::function::FunctionTraits<void ()>::callBig<CBRegisteredThreadFactory::newThread(folly::Function<void ()>&&)::{lambda()#1}>(folly::detail::function::Data&) (p=...)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/Function.h:401
 #33 0x00007f51f315bd40 in execute_native_thread_routine ()
    from /opt/couchbase/bin/../lib/libstdc++.so.6
 #34 0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #35 0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 54 (Thread 0x7f51d17d8700 (LWP 128460)):
 #0  0x00007f51f289ebf9 in syscall () from /lib64/libc.so.6
 #1  0x0000000000b9f22d in nativeFutexWaitImpl (
     waitMask=waitMask@entry=3514590744, 
     absSteadyTime=absSteadyTime@entry=0x7f51d17c65f8, 
     absSystemTime=absSystemTime@entry=0x0, expected=expected@entry=2, 
     addr=addr@entry=0x7f51d27db0d8)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/Futex.cpp:123
 #2  folly::detail::futexWaitImpl (futex=futex@entry=0x7f51d27db0d8, 
     expected=expected@entry=2, absSystemTime=absSystemTime@entry=0x0, 
     absSteadyTime=absSteadyTime@entry=0x7f51d17c6618, 
     waitMask=waitMask@entry=4294967295)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/Futex.cpp:254
 #3  0x0000000000ba92fa in futexWaitImpl<std::atomic<unsigned int> const, std::chrono::time_point<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1, 1000000000> > > > (waitMask=4294967295, deadline=..., 
     expected=2, futex=0x7f51d27db0d8)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/Futex-inl.h:85
 #4  folly::detail::futexWaitUntil<std::atomic<unsigned int>, std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (
     futex=futex@entry=0x7f51d27db0d8, expected=expected@entry=2, 
     deadline=..., waitMask=waitMask@entry=4294967295)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/Futex-inl.h:123
 #5  0x0000000000baf15d in futexWaitUntil<std::atomic<unsigned int>, std::chrono::time_point<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1, 1000000000> > > > (timeoutVariationFrac=0.5, stackToRetain=1024, 
     idleTimeout=..., waitMask=4294967295, deadline=..., expected=2, fut=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/MemoryIdler.h:164
 #6  folly::SaturatingSemaphore<true, std::atomic>::tryWaitSlow<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (
     this=this@entry=0x7f51d27db0d8, deadline=..., opt=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/SaturatingSemaphore.h:318
 #7  0x0000000000baf7c6 in try_wait_until<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1, 1000000000> > > (opt=..., deadline=..., 
     this=<optimized out>)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/SaturatingSemaphore.h:179
 #8  folly::detail::LifoSemBase<folly::SaturatingSemaphore<true, std::atomic>, std::atomic>::try_wait_until<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=this@entry=0x2f7c9c0, 
     deadline=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/LifoSem.h:521
 #9  0x0000000000bb2f20 in try_wait_for<long, std::ratio<1, 1000> > (
     timeout=<synthetic pointer>, this=0x2f7c9c0)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/LifoSem.h:498
 #10 folly::UnboundedBlockingQueue<folly::CPUThreadPoolExecutor::CPUTask>::try_take_for (this=0x2f7c980, time=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/task_queue/UnboundedBlockingQueue.h:41
 #11 0x0000000000ba7497 in folly::CPUThreadPoolExecutor::threadRun (
     this=0x7f51f112b400, thread=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/CPUThreadPoolExecutor.cpp:243
 #12 0x0000000000bc2709 in __invoke_impl<void, void (folly::ThreadPoolExecutor::*&)(std::shared_ptr<folly::ThreadPoolExecutor::Thread>), folly::ThreadPoolExecutor*&, std::shared_ptr<folly::ThreadPoolExecutor::Thread>&> (
     __t=<optimized out>, __f=<optimized out>)
     at /usr/local/include/c++/7.3.0/bits/invoke.h:73
 #13 __invoke<void (folly::ThreadPoolExecutor::*&)(std::shared_ptr<folly::ThreadPoolExecutor::Thread>), folly::ThreadPoolExecutor*&, std::shared_ptr<folly::ThreadPoolExecutor::Thread>&> (__fn=<optimized out>)
     at /usr/local/include/c++/7.3.0/bits/invoke.h:95
 #14 __call<void, 0, 1> (__args=<optimized out>, this=<optimized out>)
     at /usr/local/include/c++/7.3.0/functional:467
 #15 operator()<> (this=<optimized out>)
     at /usr/local/include/c++/7.3.0/functional:551
 #16 folly::detail::function::FunctionTraits<void ()>::callBig<std::_Bind<void (folly::ThreadPoolExecutor::*(folly::ThreadPoolExecutor*, std::shared_ptr<folly::ThreadPoolExecutor::Thread>))(std::shared_ptr<folly::ThreadPoolExecutor::Thread>)> >(folly::detail::function::Data&) (p=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/Function.h:401
 #17 0x0000000000a6a874 in operator() (this=0x7f51f15e0340)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/folly_executorpool.cc:47
 #18 operator() (__closure=0x7f51f15e0340)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/folly_executorpool.cc:47
 #19 folly::detail::function::FunctionTraits<void ()>::callBig<CBRegisteredThreadFactory::newThread(folly::Function<void ()>&&)::{lambda()#1}>(folly::detail::function::Data&) (p=...)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/Function.h:401
 #20 0x00007f51f315bd40 in execute_native_thread_routine ()
    from /opt/couchbase/bin/../lib/libstdc++.so.6
 #21 0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #22 0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 53 (Thread 0x7f51d0fd7700 (LWP 128461)):
 #0  0x00007f51f289ebf9 in syscall () from /lib64/libc.so.6
 #1  0x0000000000b9f22d in nativeFutexWaitImpl (
     waitMask=waitMask@entry=3506198040, 
     absSteadyTime=absSteadyTime@entry=0x7f51d0fc55f8, 
     absSystemTime=absSystemTime@entry=0x0, expected=expected@entry=2, 
     addr=addr@entry=0x7f51d27db0f0)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/Futex.cpp:123
 #2  folly::detail::futexWaitImpl (futex=futex@entry=0x7f51d27db0f0, 
     expected=expected@entry=2, absSystemTime=absSystemTime@entry=0x0, 
     absSteadyTime=absSteadyTime@entry=0x7f51d0fc5618, 
     waitMask=waitMask@entry=4294967295)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/Futex.cpp:254
 #3  0x0000000000ba92fa in futexWaitImpl<std::atomic<unsigned int> const, std::chrono::time_point<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1, 1000000000> > > > (waitMask=4294967295, deadline=..., 
     expected=2, futex=0x7f51d27db0f0)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/Futex-inl.h:85
 #4  folly::detail::futexWaitUntil<std::atomic<unsigned int>, std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (
     futex=futex@entry=0x7f51d27db0f0, expected=expected@entry=2, 
     deadline=..., waitMask=waitMask@entry=4294967295)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/Futex-inl.h:123
 #5  0x0000000000baf15d in futexWaitUntil<std::atomic<unsigned int>, std::chrono::time_point<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1, 1000000000> > > > (timeoutVariationFrac=0.5, stackToRetain=1024, 
     idleTimeout=..., waitMask=4294967295, deadline=..., expected=2, fut=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/MemoryIdler.h:164
 #6  folly::SaturatingSemaphore<true, std::atomic>::tryWaitSlow<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (
     this=this@entry=0x7f51d27db0f0, deadline=..., opt=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/SaturatingSemaphore.h:318
 #7  0x0000000000baf7c6 in try_wait_until<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1, 1000000000> > > (opt=..., deadline=..., 
     this=<optimized out>)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/SaturatingSemaphore.h:179
 #8  folly::detail::LifoSemBase<folly::SaturatingSemaphore<true, std::atomic>, std::atomic>::try_wait_until<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=this@entry=0x2f7c9c0, 
     deadline=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/LifoSem.h:521
 #9  0x0000000000bb2f20 in try_wait_for<long, std::ratio<1, 1000> > (
     timeout=<synthetic pointer>, this=0x2f7c9c0)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/LifoSem.h:498
 #10 folly::UnboundedBlockingQueue<folly::CPUThreadPoolExecutor::CPUTask>::try_take_for (this=0x2f7c980, time=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/task_queue/UnboundedBlockingQueue.h:41
 #11 0x0000000000ba7497 in folly::CPUThreadPoolExecutor::threadRun (
     this=0x7f51f112b400, thread=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/CPUThreadPoolExecutor.cpp:243
 #12 0x0000000000bc2709 in __invoke_impl<void, void (folly::ThreadPoolExecutor::*&)(std::shared_ptr<folly::ThreadPoolExecutor::Thread>), folly::ThreadPoolExecutor*&, std::shared_ptr<folly::ThreadPoolExecutor::Thread>&> (
     __t=<optimized out>, __f=<optimized out>)
     at /usr/local/include/c++/7.3.0/bits/invoke.h:73
 #13 __invoke<void (folly::ThreadPoolExecutor::*&)(std::shared_ptr<folly::ThreadPoolExecutor::Thread>), folly::ThreadPoolExecutor*&, std::shared_ptr<folly::ThreadPoolExecutor::Thread>&> (__fn=<optimized out>)
     at /usr/local/include/c++/7.3.0/bits/invoke.h:95
 #14 __call<void, 0, 1> (__args=<optimized out>, this=<optimized out>)
     at /usr/local/include/c++/7.3.0/functional:467
 #15 operator()<> (this=<optimized out>)
     at /usr/local/include/c++/7.3.0/functional:551
 #16 folly::detail::function::FunctionTraits<void ()>::callBig<std::_Bind<void (folly::ThreadPoolExecutor::*(folly::ThreadPoolExecutor*, std::shared_ptr<folly::ThreadPoolExecutor::Thread>))(std::shared_ptr<folly::ThreadPoolExecutor::Thread>)> >(folly::detail::function::Data&) (p=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/Function.h:401
 #17 0x0000000000a6a874 in operator() (this=0x7f51f15e0380)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/folly_executorpool.cc:47
 #18 operator() (__closure=0x7f51f15e0380)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/folly_executorpool.cc:47
 #19 folly::detail::function::FunctionTraits<void ()>::callBig<CBRegisteredThreadFactory::newThread(folly::Function<void ()>&&)::{lambda()#1}>(folly::detail::function::Data&) (p=...)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/Function.h:401
 #20 0x00007f51f315bd40 in execute_native_thread_routine ()
    from /opt/couchbase/bin/../lib/libstdc++.so.6
 #21 0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #22 0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 52 (Thread 0x7f51b7fff700 (LWP 128462)):
 #0  0x00007f51f289ebf9 in syscall () from /lib64/libc.so.6
 #1  0x0000000000b9f22d in nativeFutexWaitImpl (
     waitMask=waitMask@entry=3086931480, 
     absSteadyTime=absSteadyTime@entry=0x7f51b7fed5f8, 
     absSystemTime=absSystemTime@entry=0x0, expected=expected@entry=2, 
     addr=addr@entry=0x7f51d27db108)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/Futex.cpp:123
 #2  folly::detail::futexWaitImpl (futex=futex@entry=0x7f51d27db108, 
     expected=expected@entry=2, absSystemTime=absSystemTime@entry=0x0, 
     absSteadyTime=absSteadyTime@entry=0x7f51b7fed618, 
     waitMask=waitMask@entry=4294967295)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/Futex.cpp:254
 #3  0x0000000000ba92fa in futexWaitImpl<std::atomic<unsigned int> const, std::chrono::time_point<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1, 1000000000> > > > (waitMask=4294967295, deadline=..., 
     expected=2, futex=0x7f51d27db108)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/Futex-inl.h:85
 #4  folly::detail::futexWaitUntil<std::atomic<unsigned int>, std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (
     futex=futex@entry=0x7f51d27db108, expected=expected@entry=2, 
     deadline=..., waitMask=waitMask@entry=4294967295)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/Futex-inl.h:123
 #5  0x0000000000baf15d in futexWaitUntil<std::atomic<unsigned int>, std::chrono::time_point<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1, 1000000000> > > > (timeoutVariationFrac=0.5, stackToRetain=1024, 
     idleTimeout=..., waitMask=4294967295, deadline=..., expected=2, fut=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/MemoryIdler.h:164
 #6  folly::SaturatingSemaphore<true, std::atomic>::tryWaitSlow<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (
     this=this@entry=0x7f51d27db108, deadline=..., opt=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/SaturatingSemaphore.h:318
 #7  0x0000000000baf7c6 in try_wait_until<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1, 1000000000> > > (opt=..., deadline=..., 
     this=<optimized out>)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/SaturatingSemaphore.h:179
 #8  folly::detail::LifoSemBase<folly::SaturatingSemaphore<true, std::atomic>, std::atomic>::try_wait_until<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=this@entry=0x2f7c9c0, 
     deadline=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/LifoSem.h:521
 #9  0x0000000000bb2f20 in try_wait_for<long, std::ratio<1, 1000> > (
     timeout=<synthetic pointer>, this=0x2f7c9c0)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/LifoSem.h:498
 #10 folly::UnboundedBlockingQueue<folly::CPUThreadPoolExecutor::CPUTask>::try_take_for (this=0x2f7c980, time=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/task_queue/UnboundedBlockingQueue.h:41
 #11 0x0000000000ba7497 in folly::CPUThreadPoolExecutor::threadRun (
     this=0x7f51f112b400, thread=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/CPUThreadPoolExecutor.cpp:243
 #12 0x0000000000bc2709 in __invoke_impl<void, void (folly::ThreadPoolExecutor::*&)(std::shared_ptr<folly::ThreadPoolExecutor::Thread>), folly::ThreadPoolExecutor*&, std::shared_ptr<folly::ThreadPoolExecutor::Thread>&> (
     __t=<optimized out>, __f=<optimized out>)
     at /usr/local/include/c++/7.3.0/bits/invoke.h:73
 #13 __invoke<void (folly::ThreadPoolExecutor::*&)(std::shared_ptr<folly::ThreadPoolExecutor::Thread>), folly::ThreadPoolExecutor*&, std::shared_ptr<folly::ThreadPoolExecutor::Thread>&> (__fn=<optimized out>)
     at /usr/local/include/c++/7.3.0/bits/invoke.h:95
 #14 __call<void, 0, 1> (__args=<optimized out>, this=<optimized out>)
     at /usr/local/include/c++/7.3.0/functional:467
 #15 operator()<> (this=<optimized out>)
     at /usr/local/include/c++/7.3.0/functional:551
 #16 folly::detail::function::FunctionTraits<void ()>::callBig<std::_Bind<void (folly::ThreadPoolExecutor::*(folly::ThreadPoolExecutor*, std::shared_ptr<folly::ThreadPoolExecutor::Thread>))(std::shared_ptr<folly::ThreadPoolExecutor::Thread>)> >(folly::detail::function::Data&) (p=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/Function.h:401
 #17 0x0000000000a6a874 in operator() (this=0x7f51f15e03c0)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/folly_executorpool.cc:47
 #18 operator() (__closure=0x7f51f15e03c0)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/folly_executorpool.cc:47
 #19 folly::detail::function::FunctionTraits<void ()>::callBig<CBRegisteredThreadFactory::newThread(folly::Function<void ()>&&)::{lambda()#1}>(folly::detail::function::Data&) (p=...)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/Function.h:401
 #20 0x00007f51f315bd40 in execute_native_thread_routine ()
    from /opt/couchbase/bin/../lib/libstdc++.so.6
 #21 0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #22 0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 51 (Thread 0x7f51b77fe700 (LWP 128463)):
 #0  0x00007f51f289ebf9 in syscall () from /lib64/libc.so.6
 #1  0x0000000000b9f22d in nativeFutexWaitImpl (
     waitMask=waitMask@entry=3078538776, 
     absSteadyTime=absSteadyTime@entry=0x7f51b77ec5f8, 
     absSystemTime=absSystemTime@entry=0x0, expected=expected@entry=2, 
     addr=addr@entry=0x7f51d27db120)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/Futex.cpp:123
 #2  folly::detail::futexWaitImpl (futex=futex@entry=0x7f51d27db120, 
     expected=expected@entry=2, absSystemTime=absSystemTime@entry=0x0, 
     absSteadyTime=absSteadyTime@entry=0x7f51b77ec618, 
     waitMask=waitMask@entry=4294967295)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/Futex.cpp:254
 #3  0x0000000000ba92fa in futexWaitImpl<std::atomic<unsigned int> const, std::chrono::time_point<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1, 1000000000> > > > (waitMask=4294967295, deadline=..., 
     expected=2, futex=0x7f51d27db120)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/Futex-inl.h:85
 #4  folly::detail::futexWaitUntil<std::atomic<unsigned int>, std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (
     futex=futex@entry=0x7f51d27db120, expected=expected@entry=2, 
     deadline=..., waitMask=waitMask@entry=4294967295)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/Futex-inl.h:123
 #5  0x0000000000baf15d in futexWaitUntil<std::atomic<unsigned int>, std::chrono::time_point<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1, 1000000000> > > > (timeoutVariationFrac=0.5, stackToRetain=1024, 
     idleTimeout=..., waitMask=4294967295, deadline=..., expected=2, fut=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/MemoryIdler.h:164
 #6  folly::SaturatingSemaphore<true, std::atomic>::tryWaitSlow<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (
     this=this@entry=0x7f51d27db120, deadline=..., opt=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/SaturatingSemaphore.h:318
 #7  0x0000000000baf7c6 in try_wait_until<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1, 1000000000> > > (opt=..., deadline=..., 
     this=<optimized out>)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/SaturatingSemaphore.h:179
 #8  folly::detail::LifoSemBase<folly::SaturatingSemaphore<true, std::atomic>, std::atomic>::try_wait_until<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=this@entry=0x2f7c9c0, 
     deadline=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/LifoSem.h:521
 #9  0x0000000000bb2f20 in try_wait_for<long, std::ratio<1, 1000> > (
     timeout=<synthetic pointer>, this=0x2f7c9c0)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/LifoSem.h:498
 #10 folly::UnboundedBlockingQueue<folly::CPUThreadPoolExecutor::CPUTask>::try_take_for (this=0x2f7c980, time=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/task_queue/UnboundedBlockingQueue.h:41
 #11 0x0000000000ba7497 in folly::CPUThreadPoolExecutor::threadRun (
     this=0x7f51f112b400, thread=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/CPUThreadPoolExecutor.cpp:243
 #12 0x0000000000bc2709 in __invoke_impl<void, void (folly::ThreadPoolExecutor::*&)(std::shared_ptr<folly::ThreadPoolExecutor::Thread>), folly::ThreadPoolExecutor*&, std::shared_ptr<folly::ThreadPoolExecutor::Thread>&> (
     __t=<optimized out>, __f=<optimized out>)
     at /usr/local/include/c++/7.3.0/bits/invoke.h:73
 #13 __invoke<void (folly::ThreadPoolExecutor::*&)(std::shared_ptr<folly::ThreadPoolExecutor::Thread>), folly::ThreadPoolExecutor*&, std::shared_ptr<folly::ThreadPoolExecutor::Thread>&> (__fn=<optimized out>)
     at /usr/local/include/c++/7.3.0/bits/invoke.h:95
 #14 __call<void, 0, 1> (__args=<optimized out>, this=<optimized out>)
     at /usr/local/include/c++/7.3.0/functional:467
 #15 operator()<> (this=<optimized out>)
     at /usr/local/include/c++/7.3.0/functional:551
 #16 folly::detail::function::FunctionTraits<void ()>::callBig<std::_Bind<void (folly::ThreadPoolExecutor::*(folly::ThreadPoolExecutor*, std::shared_ptr<folly::ThreadPoolExecutor::Thread>))(std::shared_ptr<folly::ThreadPoolExecutor::Thread>)> >(folly::detail::function::Data&) (p=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/Function.h:401
 #17 0x0000000000a6a874 in operator() (this=0x7f51f10d5900)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/folly_executorpool.cc:47
 #18 operator() (__closure=0x7f51f10d5900)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/folly_executorpool.cc:47
 #19 folly::detail::function::FunctionTraits<void ()>::callBig<CBRegisteredThreadFactory::newThread(folly::Function<void ()>&&)::{lambda()#1}>(folly::detail::function::Data&) (p=...)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/Function.h:401
 #20 0x00007f51f315bd40 in execute_native_thread_routine ()
    from /opt/couchbase/bin/../lib/libstdc++.so.6
 #21 0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #22 0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 50 (Thread 0x7f51b6ffd700 (LWP 128464)):
 #0  0x00007f51f289ebf9 in syscall () from /lib64/libc.so.6
 #1  0x0000000000b9f22d in nativeFutexWaitImpl (
     waitMask=waitMask@entry=3070146072, 
     absSteadyTime=absSteadyTime@entry=0x7f51b6feb5f8, 
     absSystemTime=absSystemTime@entry=0x0, expected=expected@entry=2, 
     addr=addr@entry=0x7f51d27db138)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/Futex.cpp:123
 #2  folly::detail::futexWaitImpl (futex=futex@entry=0x7f51d27db138, 
     expected=expected@entry=2, absSystemTime=absSystemTime@entry=0x0, 
     absSteadyTime=absSteadyTime@entry=0x7f51b6feb618, 
     waitMask=waitMask@entry=4294967295)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/Futex.cpp:254
 #3  0x0000000000ba92fa in futexWaitImpl<std::atomic<unsigned int> const, std::chrono::time_point<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1, 1000000000> > > > (waitMask=4294967295, deadline=..., 
     expected=2, futex=0x7f51d27db138)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/Futex-inl.h:85
 #4  folly::detail::futexWaitUntil<std::atomic<unsigned int>, std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (
     futex=futex@entry=0x7f51d27db138, expected=expected@entry=2, 
     deadline=..., waitMask=waitMask@entry=4294967295)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/Futex-inl.h:123
 #5  0x0000000000baf297 in futexWaitPreIdle<std::atomic<unsigned int>, std::chrono::time_point<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1, 1000000000> > >, std::chrono::duration<long, std::ratio<1, 1000000000> > > (timeoutVariationFrac=0.5, stackToRetain=1024, idleTimeout=..., 
     waitMask=4294967295, deadline=..., expected=2, fut=..., 
     _ret=<synthetic pointer>)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/MemoryIdler.h:194
 #6  futexWaitUntil<std::atomic<unsigned int>, std::chrono::time_point<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1, 1000000000> > > > (timeoutVariationFrac=0.5, stackToRetain=1024, idleTimeout=..., 
     waitMask=4294967295, deadline=..., expected=2, fut=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/MemoryIdler.h:151
 #7  folly::SaturatingSemaphore<true, std::atomic>::tryWaitSlow<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (
     this=this@entry=0x7f51d27db138, deadline=..., opt=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/SaturatingSemaphore.h:318
 #8  0x0000000000baf7c6 in try_wait_until<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1, 1000000000> > > (opt=..., deadline=..., 
     this=<optimized out>)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/SaturatingSemaphore.h:179
 #9  folly::detail::LifoSemBase<folly::SaturatingSemaphore<true, std::atomic>, std::atomic>::try_wait_until<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=this@entry=0x2f7c9c0, 
     deadline=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/LifoSem.h:521
 #10 0x0000000000bb2f20 in try_wait_for<long, std::ratio<1, 1000> > (
     timeout=<synthetic pointer>, this=0x2f7c9c0)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/LifoSem.h:498
 #11 folly::UnboundedBlockingQueue<folly::CPUThreadPoolExecutor::CPUTask>::try_take_for (this=0x2f7c980, time=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/task_queue/UnboundedBlockingQueue.h:41
 #12 0x0000000000ba7497 in folly::CPUThreadPoolExecutor::threadRun (
     this=0x7f51f112b400, thread=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/CPUThreadPoolExecutor.cpp:243
 #13 0x0000000000bc2709 in __invoke_impl<void, void (folly::ThreadPoolExecutor::*&)(std::shared_ptr<folly::ThreadPoolExecutor::Thread>), folly::ThreadPoolExecutor*&, std::shared_ptr<folly::ThreadPoolExecutor::Thread>&> (
     __t=<optimized out>, __f=<optimized out>)
     at /usr/local/include/c++/7.3.0/bits/invoke.h:73
 #14 __invoke<void (folly::ThreadPoolExecutor::*&)(std::shared_ptr<folly::ThreadPoolExecutor::Thread>), folly::ThreadPoolExecutor*&, std::shared_ptr<folly::ThreadPoolExecutor::Thread>&> (__fn=<optimized out>)
     at /usr/local/include/c++/7.3.0/bits/invoke.h:95
 #15 __call<void, 0, 1> (__args=<optimized out>, this=<optimized out>)
     at /usr/local/include/c++/7.3.0/functional:467
 #16 operator()<> (this=<optimized out>)
     at /usr/local/include/c++/7.3.0/functional:551
 #17 folly::detail::function::FunctionTraits<void ()>::callBig<std::_Bind<void (folly::ThreadPoolExecutor::*(folly::ThreadPoolExecutor*, std::shared_ptr<folly::ThreadPoolExecutor::Thread>))(std::shared_ptr<folly::ThreadPoolExecutor::Thread>)> >(folly::detail::function::Data&) (p=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/Function.h:401
 #18 0x0000000000a6a874 in operator() (this=0x7f51f15e0440)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/folly_executorpool.cc:47
 #19 operator() (__closure=0x7f51f15e0440)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/folly_executorpool.cc:47
 #20 folly::detail::function::FunctionTraits<void ()>::callBig<CBRegisteredThreadFactory::newThread(folly::Function<void ()>&&)::{lambda()#1}>(folly::detail::function::Data&) (p=...)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/Function.h:401
 #21 0x00007f51f315bd40 in execute_native_thread_routine ()
    from /opt/couchbase/bin/../lib/libstdc++.so.6
 #22 0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #23 0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 49 (Thread 0x7f51b67fc700 (LWP 128465)):
 #0  0x00007f51f289ebf9 in syscall () from /lib64/libc.so.6
 #1  0x0000000000b9f22d in nativeFutexWaitImpl (
     waitMask=waitMask@entry=3061753368, 
     absSteadyTime=absSteadyTime@entry=0x7f51b67ea5f8, 
     absSystemTime=absSystemTime@entry=0x0, expected=expected@entry=2, 
     addr=addr@entry=0x7f51d27db150)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/Futex.cpp:123
 #2  folly::detail::futexWaitImpl (futex=futex@entry=0x7f51d27db150, 
     expected=expected@entry=2, absSystemTime=absSystemTime@entry=0x0, 
     absSteadyTime=absSteadyTime@entry=0x7f51b67ea618, 
     waitMask=waitMask@entry=4294967295)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/Futex.cpp:254
 #3  0x0000000000ba92fa in futexWaitImpl<std::atomic<unsigned int> const, std::chrono::time_point<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1, 1000000000> > > > (waitMask=4294967295, deadline=..., 
     expected=2, futex=0x7f51d27db150)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/Futex-inl.h:85
 #4  folly::detail::futexWaitUntil<std::atomic<unsigned int>, std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (
     futex=futex@entry=0x7f51d27db150, expected=expected@entry=2, 
     deadline=..., waitMask=waitMask@entry=4294967295)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/Futex-inl.h:123
 #5  0x0000000000baf297 in futexWaitPreIdle<std::atomic<unsigned int>, std::chrono::time_point<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1, 1000000000> > >, std::chrono::duration<long, std::ratio<1, 1000000000> > > (timeoutVariationFrac=0.5, stackToRetain=1024, idleTimeout=..., 
     waitMask=4294967295, deadline=..., expected=2, fut=..., 
     _ret=<synthetic pointer>)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/MemoryIdler.h:194
 #6  futexWaitUntil<std::atomic<unsigned int>, std::chrono::time_point<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1, 1000000000> > > > (timeoutVariationFrac=0.5, stackToRetain=1024, idleTimeout=..., 
     waitMask=4294967295, deadline=..., expected=2, fut=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/MemoryIdler.h:151
 #7  folly::SaturatingSemaphore<true, std::atomic>::tryWaitSlow<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (
     this=this@entry=0x7f51d27db150, deadline=..., opt=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/SaturatingSemaphore.h:318
 #8  0x0000000000baf7c6 in try_wait_until<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1, 1000000000> > > (opt=..., deadline=..., 
     this=<optimized out>)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/SaturatingSemaphore.h:179
 #9  folly::detail::LifoSemBase<folly::SaturatingSemaphore<true, std::atomic>, std::atomic>::try_wait_until<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=this@entry=0x2f7c9c0, 
     deadline=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/LifoSem.h:521
 #10 0x0000000000bb2f20 in try_wait_for<long, std::ratio<1, 1000> > (
     timeout=<synthetic pointer>, this=0x2f7c9c0)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/LifoSem.h:498
 #11 folly::UnboundedBlockingQueue<folly::CPUThreadPoolExecutor::CPUTask>::try_take_for (this=0x2f7c980, time=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/task_queue/UnboundedBlockingQueue.h:41
 #12 0x0000000000ba7497 in folly::CPUThreadPoolExecutor::threadRun (
     this=0x7f51f112b400, thread=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/CPUThreadPoolExecutor.cpp:243
 #13 0x0000000000bc2709 in __invoke_impl<void, void (folly::ThreadPoolExecutor::*&)(std::shared_ptr<folly::ThreadPoolExecutor::Thread>), folly::ThreadPoolExecutor*&, std::shared_ptr<folly::ThreadPoolExecutor::Thread>&> (
     __t=<optimized out>, __f=<optimized out>)
     at /usr/local/include/c++/7.3.0/bits/invoke.h:73
 #14 __invoke<void (folly::ThreadPoolExecutor::*&)(std::shared_ptr<folly::ThreadPoolExecutor::Thread>), folly::ThreadPoolExecutor*&, std::shared_ptr<folly::ThreadPoolExecutor::Thread>&> (__fn=<optimized out>)
     at /usr/local/include/c++/7.3.0/bits/invoke.h:95
 #15 __call<void, 0, 1> (__args=<optimized out>, this=<optimized out>)
     at /usr/local/include/c++/7.3.0/functional:467
 #16 operator()<> (this=<optimized out>)
     at /usr/local/include/c++/7.3.0/functional:551
 #17 folly::detail::function::FunctionTraits<void ()>::callBig<std::_Bind<void (folly::ThreadPoolExecutor::*(folly::ThreadPoolExecutor*, std::shared_ptr<folly::ThreadPoolExecutor::Thread>))(std::shared_ptr<folly::ThreadPoolExecutor::Thread>)> >(folly::detail::function::Data&) (p=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/Function.h:401
 #18 0x0000000000a6a874 in operator() (this=0x7f51f15e0400)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/folly_executorpool.cc:47
 #19 operator() (__closure=0x7f51f15e0400)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/folly_executorpool.cc:47
 #20 folly::detail::function::FunctionTraits<void ()>::callBig<CBRegisteredThreadFactory::newThread(folly::Function<void ()>&&)::{lambda()#1}>(folly::detail::function::Data&) (p=...)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/Function.h:401
 #21 0x00007f51f315bd40 in execute_native_thread_routine ()
    from /opt/couchbase/bin/../lib/libstdc++.so.6
 #22 0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #23 0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 48 (Thread 0x7f51b5ffb700 (LWP 128466)):
 #0  0x00007f51f289ebf9 in syscall () from /lib64/libc.so.6
 #1  0x0000000000b9f22d in nativeFutexWaitImpl (
     waitMask=waitMask@entry=3053360664, 
     absSteadyTime=absSteadyTime@entry=0x7f51b5fe95f8, 
     absSystemTime=absSystemTime@entry=0x0, expected=expected@entry=2, 
     addr=addr@entry=0x7f51d27db168)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/Futex.cpp:123
 #2  folly::detail::futexWaitImpl (futex=futex@entry=0x7f51d27db168, 
     expected=expected@entry=2, absSystemTime=absSystemTime@entry=0x0, 
     absSteadyTime=absSteadyTime@entry=0x7f51b5fe9618, 
     waitMask=waitMask@entry=4294967295)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/Futex.cpp:254
 #3  0x0000000000ba92fa in futexWaitImpl<std::atomic<unsigned int> const, std::chrono::time_point<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1, 1000000000> > > > (waitMask=4294967295, deadline=..., 
     expected=2, futex=0x7f51d27db168)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/Futex-inl.h:85
 #4  folly::detail::futexWaitUntil<std::atomic<unsigned int>, std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (
     futex=futex@entry=0x7f51d27db168, expected=expected@entry=2, 
     deadline=..., waitMask=waitMask@entry=4294967295)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/Futex-inl.h:123
 #5  0x0000000000baf297 in futexWaitPreIdle<std::atomic<unsigned int>, std::chrono::time_point<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1, 1000000000> > >, std::chrono::duration<long, std::ratio<1, 1000000000> > > (timeoutVariationFrac=0.5, stackToRetain=1024, idleTimeout=..., 
     waitMask=4294967295, deadline=..., expected=2, fut=..., 
     _ret=<synthetic pointer>)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/MemoryIdler.h:194
 #6  futexWaitUntil<std::atomic<unsigned int>, std::chrono::time_point<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1, 1000000000> > > > (timeoutVariationFrac=0.5, stackToRetain=1024, idleTimeout=..., 
     waitMask=4294967295, deadline=..., expected=2, fut=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/MemoryIdler.h:151
 #7  folly::SaturatingSemaphore<true, std::atomic>::tryWaitSlow<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (
     this=this@entry=0x7f51d27db168, deadline=..., opt=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/SaturatingSemaphore.h:318
 #8  0x0000000000baf7c6 in try_wait_until<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1, 1000000000> > > (opt=..., deadline=..., 
     this=<optimized out>)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/SaturatingSemaphore.h:179
 #9  folly::detail::LifoSemBase<folly::SaturatingSemaphore<true, std::atomic>, std::atomic>::try_wait_until<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=this@entry=0x2f7c9c0, 
     deadline=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/LifoSem.h:521
 #10 0x0000000000bb2f20 in try_wait_for<long, std::ratio<1, 1000> > (
     timeout=<synthetic pointer>, this=0x2f7c9c0)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/LifoSem.h:498
 #11 folly::UnboundedBlockingQueue<folly::CPUThreadPoolExecutor::CPUTask>::try_take_for (this=0x2f7c980, time=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/task_queue/UnboundedBlockingQueue.h:41
 #12 0x0000000000ba7497 in folly::CPUThreadPoolExecutor::threadRun (
     this=0x7f51f112b400, thread=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/CPUThreadPoolExecutor.cpp:243
 #13 0x0000000000bc2709 in __invoke_impl<void, void (folly::ThreadPoolExecutor::*&)(std::shared_ptr<folly::ThreadPoolExecutor::Thread>), folly::ThreadPoolExecutor*&, std::shared_ptr<folly::ThreadPoolExecutor::Thread>&> (
     __t=<optimized out>, __f=<optimized out>)
     at /usr/local/include/c++/7.3.0/bits/invoke.h:73
 #14 __invoke<void (folly::ThreadPoolExecutor::*&)(std::shared_ptr<folly::ThreadPoolExecutor::Thread>), folly::ThreadPoolExecutor*&, std::shared_ptr<folly::ThreadPoolExecutor::Thread>&> (__fn=<optimized out>)
     at /usr/local/include/c++/7.3.0/bits/invoke.h:95
 #15 __call<void, 0, 1> (__args=<optimized out>, this=<optimized out>)
     at /usr/local/include/c++/7.3.0/functional:467
 #16 operator()<> (this=<optimized out>)
     at /usr/local/include/c++/7.3.0/functional:551
 #17 folly::detail::function::FunctionTraits<void ()>::callBig<std::_Bind<void (folly::ThreadPoolExecutor::*(folly::ThreadPoolExecutor*, std::shared_ptr<folly::ThreadPoolExecutor::Thread>))(std::shared_ptr<folly::ThreadPoolExecutor::Thread>)> >(folly::detail::function::Data&) (p=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/Function.h:401
 #18 0x0000000000a6a874 in operator() (this=0x7f51f15e0480)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/folly_executorpool.cc:47
 #19 operator() (__closure=0x7f51f15e0480)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/folly_executorpool.cc:47
 #20 folly::detail::function::FunctionTraits<void ()>::callBig<CBRegisteredThreadFactory::newThread(folly::Function<void ()>&&)::{lambda()#1}>(folly::detail::function::Data&) (p=...)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/Function.h:401
 #21 0x00007f51f315bd40 in execute_native_thread_routine ()
    from /opt/couchbase/bin/../lib/libstdc++.so.6
 #22 0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #23 0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 47 (Thread 0x7f51b57fa700 (LWP 128467)):
 #0  0x00007f51f289ebf9 in syscall () from /lib64/libc.so.6
 #1  0x0000000000b9f22d in nativeFutexWaitImpl (
     waitMask=waitMask@entry=3044967960, 
     absSteadyTime=absSteadyTime@entry=0x7f51b57e85f8, 
     absSystemTime=absSystemTime@entry=0x0, expected=expected@entry=2, 
     addr=addr@entry=0x7f51d27db180)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/Futex.cpp:123
 #2  folly::detail::futexWaitImpl (futex=futex@entry=0x7f51d27db180, 
     expected=expected@entry=2, absSystemTime=absSystemTime@entry=0x0, 
     absSteadyTime=absSteadyTime@entry=0x7f51b57e8618, 
     waitMask=waitMask@entry=4294967295)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/Futex.cpp:254
 #3  0x0000000000ba92fa in futexWaitImpl<std::atomic<unsigned int> const, std::chrono::time_point<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1, 1000000000> > > > (waitMask=4294967295, deadline=..., 
     expected=2, futex=0x7f51d27db180)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/Futex-inl.h:85
 #4  folly::detail::futexWaitUntil<std::atomic<unsigned int>, std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (
     futex=futex@entry=0x7f51d27db180, expected=expected@entry=2, 
     deadline=..., waitMask=waitMask@entry=4294967295)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/Futex-inl.h:123
 #5  0x0000000000baf297 in futexWaitPreIdle<std::atomic<unsigned int>, std::chrono::time_point<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1, 1000000000> > >, std::chrono::duration<long, std::ratio<1, 1000000000> > > (timeoutVariationFrac=0.5, stackToRetain=1024, idleTimeout=..., 
     waitMask=4294967295, deadline=..., expected=2, fut=..., 
     _ret=<synthetic pointer>)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/MemoryIdler.h:194
 #6  futexWaitUntil<std::atomic<unsigned int>, std::chrono::time_point<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1, 1000000000> > > > (timeoutVariationFrac=0.5, stackToRetain=1024, idleTimeout=..., 
     waitMask=4294967295, deadline=..., expected=2, fut=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/MemoryIdler.h:151
 #7  folly::SaturatingSemaphore<true, std::atomic>::tryWaitSlow<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (
     this=this@entry=0x7f51d27db180, deadline=..., opt=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/SaturatingSemaphore.h:318
 #8  0x0000000000baf7c6 in try_wait_until<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1, 1000000000> > > (opt=..., deadline=..., 
     this=<optimized out>)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/SaturatingSemaphore.h:179
 #9  folly::detail::LifoSemBase<folly::SaturatingSemaphore<true, std::atomic>, std::atomic>::try_wait_until<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=this@entry=0x2f7c9c0, 
     deadline=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/LifoSem.h:521
 #10 0x0000000000bb2f20 in try_wait_for<long, std::ratio<1, 1000> > (
     timeout=<synthetic pointer>, this=0x2f7c9c0)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/LifoSem.h:498
 #11 folly::UnboundedBlockingQueue<folly::CPUThreadPoolExecutor::CPUTask>::try_take_for (this=0x2f7c980, time=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/task_queue/UnboundedBlockingQueue.h:41
 #12 0x0000000000ba7497 in folly::CPUThreadPoolExecutor::threadRun (
     this=0x7f51f112b400, thread=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/CPUThreadPoolExecutor.cpp:243
 #13 0x0000000000bc2709 in __invoke_impl<void, void (folly::ThreadPoolExecutor::*&)(std::shared_ptr<folly::ThreadPoolExecutor::Thread>), folly::ThreadPoolExecutor*&, std::shared_ptr<folly::ThreadPoolExecutor::Thread>&> (
     __t=<optimized out>, __f=<optimized out>)
     at /usr/local/include/c++/7.3.0/bits/invoke.h:73
 #14 __invoke<void (folly::ThreadPoolExecutor::*&)(std::shared_ptr<folly::ThreadPoolExecutor::Thread>), folly::ThreadPoolExecutor*&, std::shared_ptr<folly::ThreadPoolExecutor::Thread>&> (__fn=<optimized out>)
     at /usr/local/include/c++/7.3.0/bits/invoke.h:95
 #15 __call<void, 0, 1> (__args=<optimized out>, this=<optimized out>)
     at /usr/local/include/c++/7.3.0/functional:467
 #16 operator()<> (this=<optimized out>)
     at /usr/local/include/c++/7.3.0/functional:551
 #17 folly::detail::function::FunctionTraits<void ()>::callBig<std::_Bind<void (folly::ThreadPoolExecutor::*(folly::ThreadPoolExecutor*, std::shared_ptr<folly::ThreadPoolExecutor::Thread>))(std::shared_ptr<folly::ThreadPoolExecutor::Thread>)> >(folly::detail::function::Data&) (p=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/Function.h:401
 #18 0x0000000000a6a874 in operator() (this=0x7f51f15e04c0)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/folly_executorpool.cc:47
 #19 operator() (__closure=0x7f51f15e04c0)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/folly_executorpool.cc:47
 #20 folly::detail::function::FunctionTraits<void ()>::callBig<CBRegisteredThreadFactory::newThread(folly::Function<void ()>&&)::{lambda()#1}>(folly::detail::function::Data&) (p=...)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/Function.h:401
 #21 0x00007f51f315bd40 in execute_native_thread_routine ()
    from /opt/couchbase/bin/../lib/libstdc++.so.6
 #22 0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #23 0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 46 (Thread 0x7f51b4ff9700 (LWP 128468)):
 #0  0x00007f51f289ebf9 in syscall () from /lib64/libc.so.6
 #1  0x0000000000b9f22d in nativeFutexWaitImpl (
     waitMask=waitMask@entry=3036575256, 
     absSteadyTime=absSteadyTime@entry=0x7f51b4fe75f8, 
     absSystemTime=absSystemTime@entry=0x0, expected=expected@entry=2, 
     addr=addr@entry=0x7f51d27db198)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/Futex.cpp:123
 #2  folly::detail::futexWaitImpl (futex=futex@entry=0x7f51d27db198, 
     expected=expected@entry=2, absSystemTime=absSystemTime@entry=0x0, 
     absSteadyTime=absSteadyTime@entry=0x7f51b4fe7618, 
     waitMask=waitMask@entry=4294967295)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/Futex.cpp:254
 #3  0x0000000000ba92fa in futexWaitImpl<std::atomic<unsigned int> const, std::chrono::time_point<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1, 1000000000> > > > (waitMask=4294967295, deadline=..., 
     expected=2, futex=0x7f51d27db198)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/Futex-inl.h:85
 #4  folly::detail::futexWaitUntil<std::atomic<unsigned int>, std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (
     futex=futex@entry=0x7f51d27db198, expected=expected@entry=2, 
     deadline=..., waitMask=waitMask@entry=4294967295)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/Futex-inl.h:123
 #5  0x0000000000baf297 in futexWaitPreIdle<std::atomic<unsigned int>, std::chrono::time_point<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1, 1000000000> > >, std::chrono::duration<long, std::ratio<1, 1000000000> > > (timeoutVariationFrac=0.5, stackToRetain=1024, idleTimeout=..., 
     waitMask=4294967295, deadline=..., expected=2, fut=..., 
     _ret=<synthetic pointer>)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/MemoryIdler.h:194
 #6  futexWaitUntil<std::atomic<unsigned int>, std::chrono::time_point<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1, 1000000000> > > > (timeoutVariationFrac=0.5, stackToRetain=1024, idleTimeout=..., 
     waitMask=4294967295, deadline=..., expected=2, fut=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/MemoryIdler.h:151
 #7  folly::SaturatingSemaphore<true, std::atomic>::tryWaitSlow<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (
     this=this@entry=0x7f51d27db198, deadline=..., opt=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/SaturatingSemaphore.h:318
 #8  0x0000000000baf7c6 in try_wait_until<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1, 1000000000> > > (opt=..., deadline=..., 
     this=<optimized out>)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/SaturatingSemaphore.h:179
 #9  folly::detail::LifoSemBase<folly::SaturatingSemaphore<true, std::atomic>, std::atomic>::try_wait_until<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=this@entry=0x2f7e0c0, 
     deadline=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/LifoSem.h:521
 #10 0x0000000000bb2f20 in try_wait_for<long, std::ratio<1, 1000> > (
     timeout=<synthetic pointer>, this=0x2f7e0c0)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/LifoSem.h:498
 #11 folly::UnboundedBlockingQueue<folly::CPUThreadPoolExecutor::CPUTask>::try_take_for (this=0x2f7e080, time=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/task_queue/UnboundedBlockingQueue.h:41
 #12 0x0000000000ba7497 in folly::CPUThreadPoolExecutor::threadRun (
     this=0x7f51f1157000, thread=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/CPUThreadPoolExecutor.cpp:243
 #13 0x0000000000bc2709 in __invoke_impl<void, void (folly::ThreadPoolExecutor::*&)(std::shared_ptr<folly::ThreadPoolExecutor::Thread>), folly::ThreadPoolExecutor*&, std::shared_ptr<folly::ThreadPoolExecutor::Thread>&> (
     __t=<optimized out>, __f=<optimized out>)
     at /usr/local/include/c++/7.3.0/bits/invoke.h:73
 #14 __invoke<void (folly::ThreadPoolExecutor::*&)(std::shared_ptr<folly::ThreadPoolExecutor::Thread>), folly::ThreadPoolExecutor*&, std::shared_ptr<folly::ThreadPoolExecutor::Thread>&> (__fn=<optimized out>)
     at /usr/local/include/c++/7.3.0/bits/invoke.h:95
 #15 __call<void, 0, 1> (__args=<optimized out>, this=<optimized out>)
     at /usr/local/include/c++/7.3.0/functional:467
 #16 operator()<> (this=<optimized out>)
     at /usr/local/include/c++/7.3.0/functional:551
 #17 folly::detail::function::FunctionTraits<void ()>::callBig<std::_Bind<void (folly::ThreadPoolExecutor::*(folly::ThreadPoolExecutor*, std::shared_ptr<folly::ThreadPoolExecutor::Thread>))(std::shared_ptr<folly::ThreadPoolExecutor::Thread>)> >(folly::detail::function::Data&) (p=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/Function.h:401
 #18 0x0000000000a6a874 in operator() (this=0x7f51f15e05c0)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/folly_executorpool.cc:47
 #19 operator() (__closure=0x7f51f15e05c0)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/folly_executorpool.cc:47
 #20 folly::detail::function::FunctionTraits<void ()>::callBig<CBRegisteredThreadFactory::newThread(folly::Function<void ()>&&)::{lambda()#1}>(folly::detail::function::Data&) (p=...)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/Function.h:401
 #21 0x00007f51f315bd40 in execute_native_thread_routine ()
    from /opt/couchbase/bin/../lib/libstdc++.so.6
 #22 0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #23 0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 45 (Thread 0x7f5193fff700 (LWP 128469)):
 #0  0x00007f51f289ebf9 in syscall () from /lib64/libc.so.6
 #1  0x0000000000b9f22d in nativeFutexWaitImpl (
     waitMask=waitMask@entry=2482951704, 
     absSteadyTime=absSteadyTime@entry=0x7f5193fed5f8, 
     absSystemTime=absSystemTime@entry=0x0, expected=expected@entry=2, 
     addr=addr@entry=0x7f51d27db1b0)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/Futex.cpp:123
 #2  folly::detail::futexWaitImpl (futex=futex@entry=0x7f51d27db1b0, 
     expected=expected@entry=2, absSystemTime=absSystemTime@entry=0x0, 
     absSteadyTime=absSteadyTime@entry=0x7f5193fed618, 
     waitMask=waitMask@entry=4294967295)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/Futex.cpp:254
 #3  0x0000000000ba92fa in futexWaitImpl<std::atomic<unsigned int> const, std::chrono::time_point<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1, 1000000000> > > > (waitMask=4294967295, deadline=..., 
     expected=2, futex=0x7f51d27db1b0)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/Futex-inl.h:85
 #4  folly::detail::futexWaitUntil<std::atomic<unsigned int>, std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (
     futex=futex@entry=0x7f51d27db1b0, expected=expected@entry=2, 
     deadline=..., waitMask=waitMask@entry=4294967295)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/Futex-inl.h:123
 #5  0x0000000000baf297 in futexWaitPreIdle<std::atomic<unsigned int>, std::chrono::time_point<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1, 1000000000> > >, std::chrono::duration<long, std::ratio<1, 1000000000> > > (timeoutVariationFrac=0.5, stackToRetain=1024, idleTimeout=..., 
     waitMask=4294967295, deadline=..., expected=2, fut=..., 
     _ret=<synthetic pointer>)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/MemoryIdler.h:194
 #6  futexWaitUntil<std::atomic<unsigned int>, std::chrono::time_point<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1, 1000000000> > > > (timeoutVariationFrac=0.5, stackToRetain=1024, idleTimeout=..., 
     waitMask=4294967295, deadline=..., expected=2, fut=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/MemoryIdler.h:151
 #7  folly::SaturatingSemaphore<true, std::atomic>::tryWaitSlow<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (
     this=this@entry=0x7f51d27db1b0, deadline=..., opt=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/SaturatingSemaphore.h:318
 #8  0x0000000000baf7c6 in try_wait_until<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1, 1000000000> > > (opt=..., deadline=..., 
     this=<optimized out>)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/SaturatingSemaphore.h:179
 #9  folly::detail::LifoSemBase<folly::SaturatingSemaphore<true, std::atomic>, std::atomic>::try_wait_until<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=this@entry=0x2f7e640, 
     deadline=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/LifoSem.h:521
 #10 0x0000000000bb2f20 in try_wait_for<long, std::ratio<1, 1000> > (
     timeout=<synthetic pointer>, this=0x2f7e640)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/LifoSem.h:498
 #11 folly::UnboundedBlockingQueue<folly::CPUThreadPoolExecutor::CPUTask>::try_take_for (this=0x2f7e600, time=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/task_queue/UnboundedBlockingQueue.h:41
 #12 0x0000000000ba7497 in folly::CPUThreadPoolExecutor::threadRun (
     this=0x7f51f1157c00, thread=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/CPUThreadPoolExecutor.cpp:243
 #13 0x0000000000bc2709 in __invoke_impl<void, void (folly::ThreadPoolExecutor::*&)(std::shared_ptr<folly::ThreadPoolExecutor::Thread>), folly::ThreadPoolExecutor*&, std::shared_ptr<folly::ThreadPoolExecutor::Thread>&> (
     __t=<optimized out>, __f=<optimized out>)
     at /usr/local/include/c++/7.3.0/bits/invoke.h:73
 #14 __invoke<void (folly::ThreadPoolExecutor::*&)(std::shared_ptr<folly::ThreadPoolExecutor::Thread>), folly::ThreadPoolExecutor*&, std::shared_ptr<folly::ThreadPoolExecutor::Thread>&> (__fn=<optimized out>)
     at /usr/local/include/c++/7.3.0/bits/invoke.h:95
 #15 __call<void, 0, 1> (__args=<optimized out>, this=<optimized out>)
     at /usr/local/include/c++/7.3.0/functional:467
 #16 operator()<> (this=<optimized out>)
     at /usr/local/include/c++/7.3.0/functional:551
 #17 folly::detail::function::FunctionTraits<void ()>::callBig<std::_Bind<void (folly::ThreadPoolExecutor::*(folly::ThreadPoolExecutor*, std::shared_ptr<folly::ThreadPoolExecutor::Thread>))(std::shared_ptr<folly::ThreadPoolExecutor::Thread>)> >(folly::detail::function::Data&) (p=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/Function.h:401
 #18 0x0000000000a6a874 in operator() (this=0x7f51f15e3080)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/folly_executorpool.cc:47
 #19 operator() (__closure=0x7f51f15e3080)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/folly_executorpool.cc:47
 #20 folly::detail::function::FunctionTraits<void ()>::callBig<CBRegisteredThreadFactory::newThread(folly::Function<void ()>&&)::{lambda()#1}>(folly::detail::function::Data&) (p=...)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/Function.h:401
 #21 0x00007f51f315bd40 in execute_native_thread_routine ()
    from /opt/couchbase/bin/../lib/libstdc++.so.6
 #22 0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #23 0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 44 (Thread 0x7f51937fe700 (LWP 128470)):
 #0  0x00007f51f289ebf9 in syscall () from /lib64/libc.so.6
 #1  0x0000000000b9f22d in nativeFutexWaitImpl (
     waitMask=waitMask@entry=2474559000, 
     absSteadyTime=absSteadyTime@entry=0x7f51937ec5f8, 
     absSystemTime=absSystemTime@entry=0x0, expected=expected@entry=2, 
     addr=addr@entry=0x7f51d27db090)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/Futex.cpp:123
 #2  folly::detail::futexWaitImpl (futex=futex@entry=0x7f51d27db090, 
     expected=expected@entry=2, absSystemTime=absSystemTime@entry=0x0, 
     absSteadyTime=absSteadyTime@entry=0x7f51937ec618, 
     waitMask=waitMask@entry=4294967295)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/Futex.cpp:254
 #3  0x0000000000ba92fa in futexWaitImpl<std::atomic<unsigned int> const, std::chrono::time_point<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1, 1000000000> > > > (waitMask=4294967295, deadline=..., 
     expected=2, futex=0x7f51d27db090)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/Futex-inl.h:85
 #4  folly::detail::futexWaitUntil<std::atomic<unsigned int>, std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (
     futex=futex@entry=0x7f51d27db090, expected=expected@entry=2, 
     deadline=..., waitMask=waitMask@entry=4294967295)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/Futex-inl.h:123
 #5  0x0000000000baf297 in futexWaitPreIdle<std::atomic<unsigned int>, std::chrono::time_point<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1, 1000000000> > >, std::chrono::duration<long, std::ratio<1, 1000000000> > > (timeoutVariationFrac=0.5, stackToRetain=1024, idleTimeout=..., 
     waitMask=4294967295, deadline=..., expected=2, fut=..., 
     _ret=<synthetic pointer>)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/MemoryIdler.h:194
 #6  futexWaitUntil<std::atomic<unsigned int>, std::chrono::time_point<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1, 1000000000> > > > (timeoutVariationFrac=0.5, stackToRetain=1024, idleTimeout=..., 
     waitMask=4294967295, deadline=..., expected=2, fut=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/MemoryIdler.h:151
 #7  folly::SaturatingSemaphore<true, std::atomic>::tryWaitSlow<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (
     this=this@entry=0x7f51d27db090, deadline=..., opt=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/SaturatingSemaphore.h:318
 #8  0x0000000000baf7c6 in try_wait_until<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1, 1000000000> > > (opt=..., deadline=..., 
     this=<optimized out>)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/SaturatingSemaphore.h:179
 #9  folly::detail::LifoSemBase<folly::SaturatingSemaphore<true, std::atomic>, std::atomic>::try_wait_until<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=this@entry=0x2f7e640, 
     deadline=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/LifoSem.h:521
 #10 0x0000000000bb2f20 in try_wait_for<long, std::ratio<1, 1000> > (
     timeout=<synthetic pointer>, this=0x2f7e640)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/LifoSem.h:498
 #11 folly::UnboundedBlockingQueue<folly::CPUThreadPoolExecutor::CPUTask>::try_take_for (this=0x2f7e600, time=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/task_queue/UnboundedBlockingQueue.h:41
 #12 0x0000000000ba7497 in folly::CPUThreadPoolExecutor::threadRun (
     this=0x7f51f1157c00, thread=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/CPUThreadPoolExecutor.cpp:243
 #13 0x0000000000bc2709 in __invoke_impl<void, void (folly::ThreadPoolExecutor::*&)(std::shared_ptr<folly::ThreadPoolExecutor::Thread>), folly::ThreadPoolExecutor*&, std::shared_ptr<folly::ThreadPoolExecutor::Thread>&> (
     __t=<optimized out>, __f=<optimized out>)
     at /usr/local/include/c++/7.3.0/bits/invoke.h:73
 #14 __invoke<void (folly::ThreadPoolExecutor::*&)(std::shared_ptr<folly::ThreadPoolExecutor::Thread>), folly::ThreadPoolExecutor*&, std::shared_ptr<folly::ThreadPoolExecutor::Thread>&> (__fn=<optimized out>)
     at /usr/local/include/c++/7.3.0/bits/invoke.h:95
 #15 __call<void, 0, 1> (__args=<optimized out>, this=<optimized out>)
     at /usr/local/include/c++/7.3.0/functional:467
 #16 operator()<> (this=<optimized out>)
     at /usr/local/include/c++/7.3.0/functional:551
 #17 folly::detail::function::FunctionTraits<void ()>::callBig<std::_Bind<void (folly::ThreadPoolExecutor::*(folly::ThreadPoolExecutor*, std::shared_ptr<folly::ThreadPoolExecutor::Thread>))(std::shared_ptr<folly::ThreadPoolExecutor::Thread>)> >(folly::detail::function::Data&) (p=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/Function.h:401
 #18 0x0000000000a6a874 in operator() (this=0x7f51f15e30c0)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/folly_executorpool.cc:47
 #19 operator() (__closure=0x7f51f15e30c0)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/executor/folly_executorpool.cc:47
 #20 folly::detail::function::FunctionTraits<void ()>::callBig<CBRegisteredThreadFactory::newThread(folly::Function<void ()>&&)::{lambda()#1}>(folly::detail::function::Data&) (p=...)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/Function.h:401
 #21 0x00007f51f315bd40 in execute_native_thread_routine ()
    from /opt/couchbase/bin/../lib/libstdc++.so.6
 #22 0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #23 0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 43 (Thread 0x7f5192ffd700 (LWP 128471)):
 #0  0x00007f51f28a4eb3 in epoll_wait () from /lib64/libc.so.6
 #1  0x00007f51f42383c5 in epoll_dispatch (base=0x7f51f1090e00, 
     tv=<optimized out>)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/epoll.c:465
 #2  0x00007f51f422f376 in event_base_loop (base=0x7f51f1090e00, flags=1)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/event.c:1998
 #3  0x0000000000bc8e37 in folly::EventBase::loopBody (
     this=this@entry=0x7f51f15ec180, flags=flags@entry=0, 
     ignoreKeepAlive=ignoreKeepAlive@entry=false)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/io/async/EventBase.cpp:397
 #4  0x0000000000bc9306 in folly::EventBase::loop (
     this=this@entry=0x7f51f15ec180)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/io/async/EventBase.cpp:315
 #5  0x0000000000bcacc6 in folly::EventBase::loopForever (this=0x7f51f15ec180)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/io/async/EventBase.cpp:538
 #6  0x0000000000bb6f79 in folly::IOThreadPoolExecutor::threadRun (
     this=0x7f51f15eb780, thread=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/IOThreadPoolExecutor.cpp:195
 #7  0x0000000000bc2709 in __invoke_impl<void, void (folly::ThreadPoolExecutor::*&)(std::shared_ptr<folly::ThreadPoolExecutor::Thread>), folly::ThreadPoolExecutor*&, std::shared_ptr<folly::ThreadPoolExecutor::Thread>&> (
     __t=<optimized out>, __f=<optimized out>)
     at /usr/local/include/c++/7.3.0/bits/invoke.h:73
 #8  __invoke<void (folly::ThreadPoolExecutor::*&)(std::shared_ptr<folly::ThreadPoolExecutor::Thread>), folly::ThreadPoolExecutor*&, std::shared_ptr<folly::ThreadPoolExecutor::Thread>&> (__fn=<optimized out>)
     at /usr/local/include/c++/7.3.0/bits/invoke.h:95
 #9  __call<void, 0, 1> (__args=<optimized out>, this=<optimized out>)
     at /usr/local/include/c++/7.3.0/functional:467
 #10 operator()<> (this=<optimized out>)
     at /usr/local/include/c++/7.3.0/functional:551
 #11 folly::detail::function::FunctionTraits<void ()>::callBig<std::_Bind<void (folly::ThreadPoolExecutor::*(folly::ThreadPoolExecutor*, std::shared_ptr<folly::ThreadPoolExecutor::Thread>))(std::shared_ptr<folly::ThreadPoolExecutor::Thread>)> >(folly::detail::function::Data&) (p=...)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/Function.h:401
 #12 0x00007f51f315bd40 in execute_native_thread_routine ()
    from /opt/couchbase/bin/../lib/libstdc++.so.6
 #13 0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #14 0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 42 (Thread 0x7f51927fc700 (LWP 128472)):
 #0  0x00007f51f4f67de2 in pthread_cond_timedwait@@GLIBC_2.3.2 ()
    from /lib64/libpthread.so.0
 #1  0x00007f51f4470e51 in background_thread_sleep (tsdn=<optimized out>, 
     interval=1600000000, info=<optimized out>) at src/background_thread.c:255
 #2  background_work_sleep_once (ind=<optimized out>, info=<optimized out>, 
     tsdn=<optimized out>) at src/background_thread.c:307
 #3  background_work (ind=<optimized out>, tsd=0x7f51927eb220)
     at src/background_thread.c:497
 #4  background_thread_entry (ind_arg=<optimized out>)
     at src/background_thread.c:522
 #5  0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #6  0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 41 (Thread 0x7f5191ffb700 (LWP 128473)):
 #0  0x00007f51f4f67de2 in pthread_cond_timedwait@@GLIBC_2.3.2 ()
    from /lib64/libpthread.so.0
 #1  0x00000000009a9dbf in __gthread_cond_timedwait (
     __abs_timeout=0x7f5191fe9960, __mutex=<optimized out>, 
     __cond=0x7f51f11a1498)
     at /opt/gcc-10.2.0/include/c++/10.2.0/x86_64-pc-linux-gnu/bits/gthr-default.h:872
 #2  __wait_until_impl<std::chrono::duration<long, std::ratio<1, 1000000000> > > (__lock=..., __lock=..., __atime=<synthetic pointer>, this=0x7f51f11a1498)
     at /opt/gcc-10.2.0/include/c++/10.2.0/condition_variable:232
 #3  wait_until<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1, 1000000000> > > (__atime=..., __lock=..., this=0x7f51f11a1498)
     at /opt/gcc-10.2.0/include/c++/10.2.0/condition_variable:141
 #4  wait_for<long, std::ratio<1, 1000000000> > (__rtime=..., __rtime=..., 
     __lock=..., this=0x7f51f11a1498)
     at /opt/gcc-10.2.0/include/c++/10.2.0/condition_variable:172
 #5  magma::TaskQueue::dequeue(std::atomic<bool>&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:99
 #6  0x00000000009a9f11 in magma::TaskWorker::loop(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:160
 #7  0x0000000000b54b79 in run (this=0x7f51f117d6c0)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:51
 #8  platform_thread_wrap(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:64
 #9  0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #10 0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 40 (Thread 0x7f51917fa700 (LWP 128474)):
 #0  0x00007f51f4f67de2 in pthread_cond_timedwait@@GLIBC_2.3.2 ()
    from /lib64/libpthread.so.0
 #1  0x00000000009a9dbf in __gthread_cond_timedwait (
     __abs_timeout=0x7f51917e8960, __mutex=<optimized out>, 
     __cond=0x7f51f11a1498)
     at /opt/gcc-10.2.0/include/c++/10.2.0/x86_64-pc-linux-gnu/bits/gthr-default.h:872
 #2  __wait_until_impl<std::chrono::duration<long, std::ratio<1, 1000000000> > > (__lock=..., __lock=..., __atime=<synthetic pointer>, this=0x7f51f11a1498)
     at /opt/gcc-10.2.0/include/c++/10.2.0/condition_variable:232
 #3  wait_until<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1, 1000000000> > > (__atime=..., __lock=..., this=0x7f51f11a1498)
     at /opt/gcc-10.2.0/include/c++/10.2.0/condition_variable:141
 #4  wait_for<long, std::ratio<1, 1000000000> > (__rtime=..., __rtime=..., 
     __lock=..., this=0x7f51f11a1498)
     at /opt/gcc-10.2.0/include/c++/10.2.0/condition_variable:172
 #5  magma::TaskQueue::dequeue(std::atomic<bool>&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:99
 #6  0x00000000009a9f11 in magma::TaskWorker::loop(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:160
 #7  0x0000000000b54b79 in run (this=0x7f51f117d6f0)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:51
 #8  platform_thread_wrap(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:64
 #9  0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #10 0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 39 (Thread 0x7f5190ff9700 (LWP 128475)):
 #0  0x00007f51f4f67de2 in pthread_cond_timedwait@@GLIBC_2.3.2 ()
    from /lib64/libpthread.so.0
 #1  0x00000000009a9dbf in __gthread_cond_timedwait (
     __abs_timeout=0x7f5190fe7960, __mutex=<optimized out>, 
     __cond=0x7f51f11a1498)
     at /opt/gcc-10.2.0/include/c++/10.2.0/x86_64-pc-linux-gnu/bits/gthr-default.h:872
 #2  __wait_until_impl<std::chrono::duration<long, std::ratio<1, 1000000000> > > (__lock=..., __lock=..., __atime=<synthetic pointer>, this=0x7f51f11a1498)
     at /opt/gcc-10.2.0/include/c++/10.2.0/condition_variable:232
 #3  wait_until<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1, 1000000000> > > (__atime=..., __lock=..., this=0x7f51f11a1498)
     at /opt/gcc-10.2.0/include/c++/10.2.0/condition_variable:141
 #4  wait_for<long, std::ratio<1, 1000000000> > (__rtime=..., __rtime=..., 
     __lock=..., this=0x7f51f11a1498)
     at /opt/gcc-10.2.0/include/c++/10.2.0/condition_variable:172
 #5  magma::TaskQueue::dequeue(std::atomic<bool>&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:99
 #6  0x00000000009a9f11 in magma::TaskWorker::loop(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:160
 #7  0x0000000000b54b79 in run (this=0x7f51f117d720)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:51
 #8  platform_thread_wrap(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:64
 #9  0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #10 0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 38 (Thread 0x7f515ffff700 (LWP 128476)):
 #0  0x00007f51f4f67de2 in pthread_cond_timedwait@@GLIBC_2.3.2 ()
    from /lib64/libpthread.so.0
 #1  0x00000000009a9dbf in __gthread_cond_timedwait (
     __abs_timeout=0x7f515ffed960, __mutex=<optimized out>, 
     __cond=0x7f51f11a1498)
     at /opt/gcc-10.2.0/include/c++/10.2.0/x86_64-pc-linux-gnu/bits/gthr-default.h:872
 #2  __wait_until_impl<std::chrono::duration<long, std::ratio<1, 1000000000> > > (__lock=..., __lock=..., __atime=<synthetic pointer>, this=0x7f51f11a1498)
     at /opt/gcc-10.2.0/include/c++/10.2.0/condition_variable:232
 #3  wait_until<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1, 1000000000> > > (__atime=..., __lock=..., this=0x7f51f11a1498)
     at /opt/gcc-10.2.0/include/c++/10.2.0/condition_variable:141
 #4  wait_for<long, std::ratio<1, 1000000000> > (__rtime=..., __rtime=..., 
     __lock=..., this=0x7f51f11a1498)
     at /opt/gcc-10.2.0/include/c++/10.2.0/condition_variable:172
 #5  magma::TaskQueue::dequeue(std::atomic<bool>&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:99
 #6  0x00000000009a9f11 in magma::TaskWorker::loop(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:160
 #7  0x0000000000b54b79 in run (this=0x7f51f117d750)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:51
 #8  platform_thread_wrap(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:64
 #9  0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #10 0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 37 (Thread 0x7f515f7fe700 (LWP 128477)):
 #0  0x00007f51f4f67a35 in pthread_cond_wait@@GLIBC_2.3.2 ()
    from /lib64/libpthread.so.0
 #1  0x00007f51f31568bc in std::condition_variable::wait(std::unique_lock<std::mutex>&) () from /opt/couchbase/bin/../lib/libstdc++.so.6
 #2  0x00000000009a9b28 in magma::TaskQueue::dequeue(std::atomic<bool>&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:101
 #3  0x00000000009a9f11 in magma::TaskWorker::loop(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:160
 #4  0x0000000000b54b79 in run (this=0x7f51f117d780)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:51
 #5  platform_thread_wrap(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:64
 #6  0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #7  0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 36 (Thread 0x7f515effd700 (LWP 128478)):
 #0  0x00007f51f4f67a35 in pthread_cond_wait@@GLIBC_2.3.2 ()
    from /lib64/libpthread.so.0
 #1  0x00007f51f31568bc in std::condition_variable::wait(std::unique_lock<std::mutex>&) () from /opt/couchbase/bin/../lib/libstdc++.so.6
 #2  0x00000000009a9b28 in magma::TaskQueue::dequeue(std::atomic<bool>&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:101
 #3  0x00000000009a9f11 in magma::TaskWorker::loop(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:160
 #4  0x0000000000b54b79 in run (this=0x7f51f117d7b0)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:51
 #5  platform_thread_wrap(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:64
 #6  0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #7  0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 35 (Thread 0x7f515e7fc700 (LWP 128479)):
 #0  0x00007f51f4f67a35 in pthread_cond_wait@@GLIBC_2.3.2 ()
    from /lib64/libpthread.so.0
 #1  0x00007f51f31568bc in std::condition_variable::wait(std::unique_lock<std::mutex>&) () from /opt/couchbase/bin/../lib/libstdc++.so.6
 #2  0x00000000009a9b28 in magma::TaskQueue::dequeue(std::atomic<bool>&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:101
 #3  0x00000000009a9f11 in magma::TaskWorker::loop(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:160
 #4  0x0000000000b54b79 in run (this=0x7f51f117d7e0)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:51
 #5  platform_thread_wrap(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:64
 #6  0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #7  0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 34 (Thread 0x7f515dffb700 (LWP 128480)):
 #0  0x00007f51f4f67a35 in pthread_cond_wait@@GLIBC_2.3.2 ()
    from /lib64/libpthread.so.0
 #1  0x00007f51f31568bc in std::condition_variable::wait(std::unique_lock<std::mutex>&) () from /opt/couchbase/bin/../lib/libstdc++.so.6
 #2  0x00000000009a9b28 in magma::TaskQueue::dequeue(std::atomic<bool>&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:101
 #3  0x00000000009a9f11 in magma::TaskWorker::loop(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:160
 #4  0x0000000000b54b79 in run (this=0x7f51f117d810)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:51
 #5  platform_thread_wrap(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:64
 #6  0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #7  0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 33 (Thread 0x7f515cfff700 (LWP 128492)):
 #0  0x00007f51f4f6afc3 in pread64 () from /lib64/libpthread.so.0
 #1  0x0000000000996858 in magma::BasicFile::Read(long, unsigned long, char*, unsigned long*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/file/file_impl_linux.cc:145
 #2  0x00000000009f7f8a in magma::FileWithStats::Read(long, unsigned long, char*, unsigned long*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/file/file_impl_stats.cc:39
 #3  0x000000000099aae6 in magma::BufferedFileReader::Read(magma::File*, long, unsigned long, magma::Slice&, unsigned long&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/rw_file.cc:273
 #4  0x00000000009a7ec4 in magma::ReadAndTransform(magma::File*, long, unsigned long, std::function<magma::Status (char const*, unsigned long, std::unique_ptr<char [], std::default_delete<char []> >&, unsigned long&)>, std::unique_ptr<char [], std::default_delete<char []> >&, unsigned long&, unsigned long&, magma::BufferedFileReader*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/block_cache.cc:39
 #5  0x000000000099f0d2 in magma::ManagedFile::Read(std::shared_ptr<magma::Cache<magma::ManagedFile*, magma::File>::ObjectHandleImpl> const&, long, unsigned long, std::shared_ptr<char const>&, unsigned long&, unsigned long&, magma::CacheReadMode, std::function<magma::Status (char const*, unsigned long, std::unique_ptr<char [], std::default_delete<char []> >&, unsigned long&)>, magma::BufferedFileReader*) () at /opt/gcc-10.2.0/include/c++/10.2.0/bits/std_function.h:248
 #6  0x00000000009fd0ed in magma::SSTable::readBlock(std::shared_ptr<magma::Cache<magma::ManagedFile*, magma::File>::ObjectHandleImpl> const&, magma::BlockPointer const&, magma::Block*, magma::ReaderStats&, bool, magma::BufferedFileReader*) () at /opt/gcc-10.2.0/include/c++/10.2.0/new:175
 #7  0x0000000000a0004f in magma::SSTableIterator::initIterators(magma::Slice const&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/lsm/sstable/sstable.cc:764
 #8  0x00000000009b5b45 in Next (this=0x7f515cfecfe0)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/lsm/iterator.cc:84
 #9  magma::MergeIterator::Next() ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/lsm/iterator.cc:81
 #10 0x00000000009c5358 in magma::KVReader::ReadKVs (
     this=this@entry=0x7f515cfecf30)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/lsm/common.cc:69
 #11 0x00000000009e7863 in magma::LSMTree::mergeSSTables(std::vector<std::shared_ptr<magma::Table>, std::allocator<std::shared_ptr<magma::Table> > >&, magma::ItemGCFilter&, unsigned long, double, std::vector<std::shared_ptr<magma::Table>, std::allocator<std::shared_ptr<magma::Table> > >*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/lsm/lsm_tree.cc:756
 #12 0x00000000009bdd1d in magma::LSMTree::compactLevelForInputs(int, int, std::unique_lock<std::mutex>&, magma::LSMTree::CompactionTrigger, std::vector<std::shared_ptr<magma::Table>, std::allocator<std::shared_ptr<magma::Table> > >&, std::vector<std::shared_ptr<magma::Table>, std::allocator<std::shared_ptr<magma::Table> > >&, std::function<std::unique_ptr<magma::GCContext, std::default_delete<magma::GCContext> > (bool)>) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/lsm/compaction.cc:202
 #13 0x00000000009c055f in magma::LSMTree::compactLevel(int, std::unique_lock<std::mutex>&, magma::LSMTree::CompactionTrigger, std::function<std::unique_ptr<magma::GCContext, std::default_delete<magma::GCContext> > (bool)>) ()
     at /opt/gcc-10.2.0/include/c++/10.2.0/bits/std_function.h:248
 #14 0x00000000009c0811 in magma::LSMTree::compact(std::unique_lock<std::mutex>&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/lsm/compaction.cc:384
 #15 0x00000000009d8e18 in doCompactionWork (this=0x7f5151fa0010)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/lsm/lsm_tree.cc:385
 #16 operator() (__closure=<optimized out>)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/lsm/lsm_tree.cc:395
 #17 __invoke_impl<void, magma::LSMTree::queueCompaction()::<lambda()>&> (
     __f=...) at /opt/gcc-10.2.0/include/c++/10.2.0/bits/invoke.h:60
 #18 __invoke_r<void, magma::LSMTree::queueCompaction()::<lambda()>&> (
     __fn=...) at /opt/gcc-10.2.0/include/c++/10.2.0/bits/invoke.h:110
 #19 std::_Function_handler<void (), magma::LSMTree::queueCompaction()::{lambda()#1}>::_M_invoke(std::_Any_data const&) ()
     at /opt/gcc-10.2.0/include/c++/10.2.0/bits/std_function.h:291
 #20 0x00000000009a8734 in operator() (this=0x7f5148da22d0)
     at /opt/gcc-10.2.0/include/c++/10.2.0/bits/std_function.h:248
 #21 magma::TimedTask::Complete(bool) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:144
 #22 0x00000000009a9f21 in magma::TaskWorker::loop(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:161
 #23 0x0000000000b54b79 in run (this=0x7f51f117d840)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:51
 #24 platform_thread_wrap(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:64
 #25 0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #26 0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 32 (Thread 0x7f515bdd3700 (LWP 128493)):
 #0  0x00007f51f4f67a35 in pthread_cond_wait@@GLIBC_2.3.2 ()
    from /lib64/libpthread.so.0
 #1  0x00007f51f31568bc in std::condition_variable::wait(std::unique_lock<std::mutex>&) () from /opt/couchbase/bin/../lib/libstdc++.so.6
 #2  0x00000000009a9b28 in magma::TaskQueue::dequeue(std::atomic<bool>&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:101
 #3  0x00000000009a9f11 in magma::TaskWorker::loop(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:160
 #4  0x0000000000b54b79 in run (this=0x7f51f117d8a0)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:51
 #5  platform_thread_wrap(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:64
 #6  0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #7  0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 31 (Thread 0x7f515b5d2700 (LWP 128494)):
 #0  0x00007f51f4f67a35 in pthread_cond_wait@@GLIBC_2.3.2 ()
    from /lib64/libpthread.so.0
 #1  0x00007f51f31568bc in std::condition_variable::wait(std::unique_lock<std::mutex>&) () from /opt/couchbase/bin/../lib/libstdc++.so.6
 #2  0x00000000009a9b28 in magma::TaskQueue::dequeue(std::atomic<bool>&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:101
 #3  0x00000000009a9f11 in magma::TaskWorker::loop(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:160
 #4  0x0000000000b54b79 in run (this=0x7f51f117d8d0)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:51
 #5  platform_thread_wrap(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:64
 #6  0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #7  0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 30 (Thread 0x7f515add1700 (LWP 128495)):
 #0  0x00007f51f4f67a35 in pthread_cond_wait@@GLIBC_2.3.2 ()
    from /lib64/libpthread.so.0
 #1  0x00007f51f31568bc in std::condition_variable::wait(std::unique_lock<std::mutex>&) () from /opt/couchbase/bin/../lib/libstdc++.so.6
 #2  0x00000000009a9b28 in magma::TaskQueue::dequeue(std::atomic<bool>&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:101
 #3  0x00000000009a9f11 in magma::TaskWorker::loop(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:160
 #4  0x0000000000b54b79 in run (this=0x7f51f117d900)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:51
 #5  platform_thread_wrap(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:64
 #6  0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #7  0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 29 (Thread 0x7f515a5d0700 (LWP 128496)):
 #0  0x00007f51f4f67a35 in pthread_cond_wait@@GLIBC_2.3.2 ()
    from /lib64/libpthread.so.0
 #1  0x00007f51f31568bc in std::condition_variable::wait(std::unique_lock<std::mutex>&) () from /opt/couchbase/bin/../lib/libstdc++.so.6
 #2  0x00000000009a9b28 in magma::TaskQueue::dequeue(std::atomic<bool>&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:101
 #3  0x00000000009a9f11 in magma::TaskWorker::loop(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:160
 #4  0x0000000000b54b79 in run (this=0x7f51f117d930)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:51
 #5  platform_thread_wrap(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:64
 #6  0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #7  0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 28 (Thread 0x7f5159dcf700 (LWP 128497)):
 #0  0x00007f51f4f67a35 in pthread_cond_wait@@GLIBC_2.3.2 ()
    from /lib64/libpthread.so.0
 #1  0x00007f51f31568bc in std::condition_variable::wait(std::unique_lock<std::mutex>&) () from /opt/couchbase/bin/../lib/libstdc++.so.6
 #2  0x00000000009a9b28 in magma::TaskQueue::dequeue(std::atomic<bool>&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:101
 #3  0x00000000009a9f11 in magma::TaskWorker::loop(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:160
 #4  0x0000000000b54b79 in run (this=0x7f51f117d960)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:51
 #5  platform_thread_wrap(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:64
 #6  0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #7  0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 27 (Thread 0x7f51595ce700 (LWP 128498)):
 #0  0x00007f51f4f67a35 in pthread_cond_wait@@GLIBC_2.3.2 ()
    from /lib64/libpthread.so.0
 #1  0x00007f51f31568bc in std::condition_variable::wait(std::unique_lock<std::mutex>&) () from /opt/couchbase/bin/../lib/libstdc++.so.6
 #2  0x00000000009a9b28 in magma::TaskQueue::dequeue(std::atomic<bool>&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:101
 #3  0x00000000009a9f11 in magma::TaskWorker::loop(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:160
 #4  0x0000000000b54b79 in run (this=0x7f51b43b5b50)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:51
 #5  platform_thread_wrap(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:64
 #6  0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #7  0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 26 (Thread 0x7f5158dcd700 (LWP 128499)):
 #0  0x00007f51f4f67a35 in pthread_cond_wait@@GLIBC_2.3.2 ()
    from /lib64/libpthread.so.0
 #1  0x00007f51f31568bc in std::condition_variable::wait(std::unique_lock<std::mutex>&) () from /opt/couchbase/bin/../lib/libstdc++.so.6
 #2  0x00000000009a9b28 in magma::TaskQueue::dequeue(std::atomic<bool>&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:101
 #3  0x00000000009a9f11 in magma::TaskWorker::loop(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:160
 #4  0x0000000000b54b79 in run (this=0x7f51b43b5b80)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:51
 #5  platform_thread_wrap(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:64
 #6  0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #7  0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 25 (Thread 0x7f51585cc700 (LWP 128500)):
 #0  0x00007f51f4f67a35 in pthread_cond_wait@@GLIBC_2.3.2 ()
    from /lib64/libpthread.so.0
 #1  0x00007f51f31568bc in std::condition_variable::wait(std::unique_lock<std::mutex>&) () from /opt/couchbase/bin/../lib/libstdc++.so.6
 #2  0x00000000009a9b28 in magma::TaskQueue::dequeue(std::atomic<bool>&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:101
 #3  0x00000000009a9f11 in magma::TaskWorker::loop(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:160
 #4  0x0000000000b54b79 in run (this=0x7f51b43b5bb0)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:51
 #5  platform_thread_wrap(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:64
 #6  0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #7  0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 24 (Thread 0x7f5157dcb700 (LWP 128501)):
 #0  0x00007f51f4f67a35 in pthread_cond_wait@@GLIBC_2.3.2 ()
    from /lib64/libpthread.so.0
 #1  0x00007f51f31568bc in std::condition_variable::wait(std::unique_lock<std::mutex>&) () from /opt/couchbase/bin/../lib/libstdc++.so.6
 #2  0x00000000009a9b28 in magma::TaskQueue::dequeue(std::atomic<bool>&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:101
 #3  0x00000000009a9f11 in magma::TaskWorker::loop(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:160
 #4  0x0000000000b54b79 in run (this=0x7f51b43b5be0)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:51
 #5  platform_thread_wrap(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:64
 #6  0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #7  0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 23 (Thread 0x7f51575ca700 (LWP 128502)):
 #0  0x00007f51f4f67a35 in pthread_cond_wait@@GLIBC_2.3.2 ()
    from /lib64/libpthread.so.0
 #1  0x00007f51f31568bc in std::condition_variable::wait(std::unique_lock<std::mutex>&) () from /opt/couchbase/bin/../lib/libstdc++.so.6
 #2  0x00000000009a9b28 in magma::TaskQueue::dequeue(std::atomic<bool>&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:101
 #3  0x00000000009a9f11 in magma::TaskWorker::loop(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:160
 #4  0x0000000000b54b79 in run (this=0x7f51b43b5c10)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:51
 #5  platform_thread_wrap(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:64
 #6  0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #7  0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 22 (Thread 0x7f5156dc9700 (LWP 128503)):
 #0  0x00007f51f4f67a35 in pthread_cond_wait@@GLIBC_2.3.2 ()
    from /lib64/libpthread.so.0
 #1  0x00007f51f31568bc in std::condition_variable::wait(std::unique_lock<std::mutex>&) () from /opt/couchbase/bin/../lib/libstdc++.so.6
 #2  0x00000000009a9b28 in magma::TaskQueue::dequeue(std::atomic<bool>&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:101
 #3  0x00000000009a9f11 in magma::TaskWorker::loop(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:160
 #4  0x0000000000b54b79 in run (this=0x7f51b43b5c40)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:51
 #5  platform_thread_wrap(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:64
 #6  0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #7  0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 21 (Thread 0x7f514d760700 (LWP 128605)):
 #0  0x00007f51f4f67de2 in pthread_cond_timedwait@@GLIBC_2.3.2 ()
    from /lib64/libpthread.so.0
 #1  0x00000000009a9dbf in __gthread_cond_timedwait (
     __abs_timeout=0x7f514d74e960, __mutex=<optimized out>, 
     __cond=0x7f51f11a1498)
     at /opt/gcc-10.2.0/include/c++/10.2.0/x86_64-pc-linux-gnu/bits/gthr-default.h:872
 #2  __wait_until_impl<std::chrono::duration<long, std::ratio<1, 1000000000> > > (__lock=..., __lock=..., __atime=<synthetic pointer>, this=0x7f51f11a1498)
     at /opt/gcc-10.2.0/include/c++/10.2.0/condition_variable:232
 #3  wait_until<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1, 1000000000> > > (__atime=..., __lock=..., this=0x7f51f11a1498)
     at /opt/gcc-10.2.0/include/c++/10.2.0/condition_variable:141
 #4  wait_for<long, std::ratio<1, 1000000000> > (__rtime=..., __rtime=..., 
     __lock=..., this=0x7f51f11a1498)
     at /opt/gcc-10.2.0/include/c++/10.2.0/condition_variable:172
 #5  magma::TaskQueue::dequeue(std::atomic<bool>&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:99
 #6  0x00000000009a9f11 in magma::TaskWorker::loop(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:160
 #7  0x0000000000b54b79 in run (this=0x7f515444ea30)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:51
 #8  platform_thread_wrap(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:64
 #9  0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #10 0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 20 (Thread 0x7f514cf5f700 (LWP 128606)):
 #0  0x00007f51f4f67de2 in pthread_cond_timedwait@@GLIBC_2.3.2 ()
    from /lib64/libpthread.so.0
 #1  0x00000000009a9dbf in __gthread_cond_timedwait (
     __abs_timeout=0x7f514cf4d960, __mutex=<optimized out>, 
     __cond=0x7f51f11a1498)
     at /opt/gcc-10.2.0/include/c++/10.2.0/x86_64-pc-linux-gnu/bits/gthr-default.h:872
 #2  __wait_until_impl<std::chrono::duration<long, std::ratio<1, 1000000000> > > (__lock=..., __lock=..., __atime=<synthetic pointer>, this=0x7f51f11a1498)
     at /opt/gcc-10.2.0/include/c++/10.2.0/condition_variable:232
 #3  wait_until<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1, 1000000000> > > (__atime=..., __lock=..., this=0x7f51f11a1498)
     at /opt/gcc-10.2.0/include/c++/10.2.0/condition_variable:141
 #4  wait_for<long, std::ratio<1, 1000000000> > (__rtime=..., __rtime=..., 
     __lock=..., this=0x7f51f11a1498)
     at /opt/gcc-10.2.0/include/c++/10.2.0/condition_variable:172
 #5  magma::TaskQueue::dequeue(std::atomic<bool>&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:99
 #6  0x00000000009a9f11 in magma::TaskWorker::loop(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:160
 #7  0x0000000000b54b79 in run (this=0x7f515444ea90)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:51
 #8  platform_thread_wrap(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:64
 #9  0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #10 0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 19 (Thread 0x7f514c75e700 (LWP 128607)):
 #0  0x00007f51f4f67de2 in pthread_cond_timedwait@@GLIBC_2.3.2 ()
    from /lib64/libpthread.so.0
 #1  0x00000000009a9dbf in __gthread_cond_timedwait (
     __abs_timeout=0x7f514c74c960, __mutex=<optimized out>, 
     __cond=0x7f51f11a1498)
     at /opt/gcc-10.2.0/include/c++/10.2.0/x86_64-pc-linux-gnu/bits/gthr-default.h:872
 #2  __wait_until_impl<std::chrono::duration<long, std::ratio<1, 1000000000> > > (__lock=..., __lock=..., __atime=<synthetic pointer>, this=0x7f51f11a1498)
     at /opt/gcc-10.2.0/include/c++/10.2.0/condition_variable:232
 #3  wait_until<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1, 1000000000> > > (__atime=..., __lock=..., this=0x7f51f11a1498)
     at /opt/gcc-10.2.0/include/c++/10.2.0/condition_variable:141
 #4  wait_for<long, std::ratio<1, 1000000000> > (__rtime=..., __rtime=..., 
     __lock=..., this=0x7f51f11a1498)
     at /opt/gcc-10.2.0/include/c++/10.2.0/condition_variable:172
 #5  magma::TaskQueue::dequeue(std::atomic<bool>&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:99
 #6  0x00000000009a9f11 in magma::TaskWorker::loop(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:160
 #7  0x0000000000b54b79 in run (this=0x7f515384f8c0)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:51
 #8  platform_thread_wrap(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:64
 #9  0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #10 0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 18 (Thread 0x7f514bf5d700 (LWP 128608)):
 #0  0x00007f51f4f67de2 in pthread_cond_timedwait@@GLIBC_2.3.2 ()
    from /lib64/libpthread.so.0
 #1  0x00000000009a9dbf in __gthread_cond_timedwait (
     __abs_timeout=0x7f514bf4b960, __mutex=<optimized out>, 
     __cond=0x7f51f11a1498)
     at /opt/gcc-10.2.0/include/c++/10.2.0/x86_64-pc-linux-gnu/bits/gthr-default.h:872
 #2  __wait_until_impl<std::chrono::duration<long, std::ratio<1, 1000000000> > > (__lock=..., __lock=..., __atime=<synthetic pointer>, this=0x7f51f11a1498)
     at /opt/gcc-10.2.0/include/c++/10.2.0/condition_variable:232
 #3  wait_until<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1, 1000000000> > > (__atime=..., __lock=..., this=0x7f51f11a1498)
     at /opt/gcc-10.2.0/include/c++/10.2.0/condition_variable:141
 #4  wait_for<long, std::ratio<1, 1000000000> > (__rtime=..., __rtime=..., 
     __lock=..., this=0x7f51f11a1498)
     at /opt/gcc-10.2.0/include/c++/10.2.0/condition_variable:172
 #5  magma::TaskQueue::dequeue(std::atomic<bool>&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:99
 #6  0x00000000009a9f11 in magma::TaskWorker::loop(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:160
 #7  0x0000000000b54b79 in run (this=0x7f5153870130)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:51
 #8  platform_thread_wrap(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:64
 #9  0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #10 0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 17 (Thread 0x7f514b75c700 (LWP 128609)):
 #0  0x00007f51f4f67a35 in pthread_cond_wait@@GLIBC_2.3.2 ()
    from /lib64/libpthread.so.0
 #1  0x00007f51f31568bc in std::condition_variable::wait(std::unique_lock<std::mutex>&) () from /opt/couchbase/bin/../lib/libstdc++.so.6
 #2  0x00000000009a9b28 in magma::TaskQueue::dequeue(std::atomic<bool>&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:101
 #3  0x00000000009a9f11 in magma::TaskWorker::loop(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:160
 #4  0x0000000000b54b79 in run (this=0x7f5153870160)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:51
 #5  platform_thread_wrap(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:64
 #6  0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #7  0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 16 (Thread 0x7f514af5b700 (LWP 128610)):
 #0  0x00007f51f4f67a35 in pthread_cond_wait@@GLIBC_2.3.2 ()
    from /lib64/libpthread.so.0
 #1  0x00007f51f31568bc in std::condition_variable::wait(std::unique_lock<std::mutex>&) () from /opt/couchbase/bin/../lib/libstdc++.so.6
 #2  0x00000000009a9b28 in magma::TaskQueue::dequeue(std::atomic<bool>&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:101
 #3  0x00000000009a9f11 in magma::TaskWorker::loop(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:160
 #4  0x0000000000b54b79 in run (this=0x7f5153870190)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:51
 #5  platform_thread_wrap(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:64
 #6  0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #7  0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 15 (Thread 0x7f51470d9700 (LWP 128611)):
 #0  0x00007f51f4f67a35 in pthread_cond_wait@@GLIBC_2.3.2 ()
    from /lib64/libpthread.so.0
 #1  0x00007f51f31568bc in std::condition_variable::wait(std::unique_lock<std::mutex>&) () from /opt/couchbase/bin/../lib/libstdc++.so.6
 #2  0x00000000009a9b28 in magma::TaskQueue::dequeue(std::atomic<bool>&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:101
 #3  0x00000000009a9f11 in magma::TaskWorker::loop(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:160
 #4  0x0000000000b54b79 in run (this=0x7f5153881a00)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:51
 #5  platform_thread_wrap(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:64
 #6  0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #7  0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 14 (Thread 0x7f51468d8700 (LWP 128612)):
 #0  0x00007f51f4f67a35 in pthread_cond_wait@@GLIBC_2.3.2 ()
    from /lib64/libpthread.so.0
 #1  0x00007f51f31568bc in std::condition_variable::wait(std::unique_lock<std::mutex>&) () from /opt/couchbase/bin/../lib/libstdc++.so.6
 #2  0x00000000009a9b28 in magma::TaskQueue::dequeue(std::atomic<bool>&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:101
 #3  0x00000000009a9f11 in magma::TaskWorker::loop(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:160
 #4  0x0000000000b54b79 in run (this=0x7f5153881a30)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:51
 #5  platform_thread_wrap(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:64
 #6  0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #7  0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 13 (Thread 0x7f51460d7700 (LWP 128613)):
 #0  0x00007f51f4f67a35 in pthread_cond_wait@@GLIBC_2.3.2 ()
    from /lib64/libpthread.so.0
 #1  0x00007f51f31568bc in std::condition_variable::wait(std::unique_lock<std::mutex>&) () from /opt/couchbase/bin/../lib/libstdc++.so.6
 #2  0x00000000009a9b28 in magma::TaskQueue::dequeue(std::atomic<bool>&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:101
 #3  0x00000000009a9f11 in magma::TaskWorker::loop(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:160
 #4  0x0000000000b54b79 in run (this=0x7f5153881a60)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:51
 #5  platform_thread_wrap(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:64
 #6  0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #7  0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 12 (Thread 0x7f51458d6700 (LWP 128614)):
 #0  0x00007f51f4f67a35 in pthread_cond_wait@@GLIBC_2.3.2 ()
    from /lib64/libpthread.so.0
 #1  0x00007f51f31568bc in std::condition_variable::wait(std::unique_lock<std::mutex>&) () from /opt/couchbase/bin/../lib/libstdc++.so.6
 #2  0x00000000009a9b28 in magma::TaskQueue::dequeue(std::atomic<bool>&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:101
 #3  0x00000000009a9f11 in magma::TaskWorker::loop(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:160
 #4  0x0000000000b54b79 in run (this=0x7f51538aa2d0)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:51
 #5  platform_thread_wrap(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:64
 #6  0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #7  0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 11 (Thread 0x7f51450d5700 (LWP 128615)):
 #0  0x00007f51f4f67a35 in pthread_cond_wait@@GLIBC_2.3.2 ()
    from /lib64/libpthread.so.0
 #1  0x00007f51f31568bc in std::condition_variable::wait(std::unique_lock<std::mutex>&) () from /opt/couchbase/bin/../lib/libstdc++.so.6
 #2  0x00000000009a9b28 in magma::TaskQueue::dequeue(std::atomic<bool>&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:101
 #3  0x00000000009a9f11 in magma::TaskWorker::loop(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:160
 #4  0x0000000000b54b79 in run (this=0x7f51538aa300)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:51
 #5  platform_thread_wrap(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:64
 #6  0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #7  0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 10 (Thread 0x7f51448d4700 (LWP 128616)):
 #0  0x00007f51f4f67a35 in pthread_cond_wait@@GLIBC_2.3.2 ()
    from /lib64/libpthread.so.0
 #1  0x00007f51f31568bc in std::condition_variable::wait(std::unique_lock<std::mutex>&) () from /opt/couchbase/bin/../lib/libstdc++.so.6
 #2  0x00000000009a9b28 in magma::TaskQueue::dequeue(std::atomic<bool>&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:101
 #3  0x00000000009a9f11 in magma::TaskWorker::loop(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:160
 #4  0x0000000000b54b79 in run (this=0x7f51538aa330)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:51
 #5  platform_thread_wrap(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:64
 #6  0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #7  0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 9 (Thread 0x7f51440d3700 (LWP 128617)):
 #0  0x00007f51f4f67a35 in pthread_cond_wait@@GLIBC_2.3.2 ()
    from /lib64/libpthread.so.0
 #1  0x00007f51f31568bc in std::condition_variable::wait(std::unique_lock<std::mutex>&) () from /opt/couchbase/bin/../lib/libstdc++.so.6
 #2  0x00000000009a9b28 in magma::TaskQueue::dequeue(std::atomic<bool>&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:101
 #3  0x00000000009a9f11 in magma::TaskWorker::loop(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:160
 #4  0x0000000000b54b79 in run (this=0x7f51538c4ba0)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:51
 #5  platform_thread_wrap(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:64
 #6  0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #7  0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 8 (Thread 0x7f51438d2700 (LWP 128618)):
 #0  0x00007f51f4f67a35 in pthread_cond_wait@@GLIBC_2.3.2 ()
    from /lib64/libpthread.so.0
 #1  0x00007f51f31568bc in std::condition_variable::wait(std::unique_lock<std::mutex>&) () from /opt/couchbase/bin/../lib/libstdc++.so.6
 #2  0x00000000009a9b28 in magma::TaskQueue::dequeue(std::atomic<bool>&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:101
 #3  0x00000000009a9f11 in magma::TaskWorker::loop(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:160
 #4  0x0000000000b54b79 in run (this=0x7f51538c4bd0)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:51
 #5  platform_thread_wrap(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:64
 #6  0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #7  0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 7 (Thread 0x7f51430d1700 (LWP 128619)):
 #0  0x00007f51f4f67a35 in pthread_cond_wait@@GLIBC_2.3.2 ()
    from /lib64/libpthread.so.0
 #1  0x00007f51f31568bc in std::condition_variable::wait(std::unique_lock<std::mutex>&) () from /opt/couchbase/bin/../lib/libstdc++.so.6
 #2  0x00000000009a9b28 in magma::TaskQueue::dequeue(std::atomic<bool>&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:101
 #3  0x00000000009a9f11 in magma::TaskWorker::loop(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:160
 #4  0x0000000000b54b79 in run (this=0x7f51538c4c00)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:51
 #5  platform_thread_wrap(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:64
 #6  0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #7  0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 6 (Thread 0x7f51428d0700 (LWP 128620)):
 #0  0x00007f51f4f67a35 in pthread_cond_wait@@GLIBC_2.3.2 ()
    from /lib64/libpthread.so.0
 #1  0x00007f51f31568bc in std::condition_variable::wait(std::unique_lock<std::mutex>&) () from /opt/couchbase/bin/../lib/libstdc++.so.6
 #2  0x00000000009a9b28 in magma::TaskQueue::dequeue(std::atomic<bool>&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:101
 #3  0x00000000009a9f11 in magma::TaskWorker::loop(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:160
 #4  0x0000000000b54b79 in run (this=0x7f51538d7470)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:51
 #5  platform_thread_wrap(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:64
 #6  0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #7  0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 5 (Thread 0x7f51420cf700 (LWP 128621)):
 #0  0x00007f51f4f67a35 in pthread_cond_wait@@GLIBC_2.3.2 ()
    from /lib64/libpthread.so.0
 #1  0x00007f51f31568bc in std::condition_variable::wait(std::unique_lock<std::mutex>&) () from /opt/couchbase/bin/../lib/libstdc++.so.6
 #2  0x00000000009a9b28 in magma::TaskQueue::dequeue(std::atomic<bool>&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:101
 #3  0x00000000009a9f11 in magma::TaskWorker::loop(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:160
 #4  0x0000000000b54b79 in run (this=0x7f51538d74a0)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:51
 #5  platform_thread_wrap(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:64
 #6  0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #7  0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 4 (Thread 0x7f51418ce700 (LWP 128622)):
 #0  0x00007f51f4f67a35 in pthread_cond_wait@@GLIBC_2.3.2 ()
    from /lib64/libpthread.so.0
 #1  0x00007f51f31568bc in std::condition_variable::wait(std::unique_lock<std::mutex>&) () from /opt/couchbase/bin/../lib/libstdc++.so.6
 #2  0x00000000009a9b28 in magma::TaskQueue::dequeue(std::atomic<bool>&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:101
 #3  0x00000000009a9f11 in magma::TaskWorker::loop(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:160
 #4  0x0000000000b54b79 in run (this=0x7f51538d74d0)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:51
 #5  platform_thread_wrap(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:64
 #6  0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #7  0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 3 (Thread 0x7f51410cd700 (LWP 128623)):
 #0  0x00007f51f4f67a35 in pthread_cond_wait@@GLIBC_2.3.2 ()
    from /lib64/libpthread.so.0
 #1  0x00007f51f31568bc in std::condition_variable::wait(std::unique_lock<std::mutex>&) () from /opt/couchbase/bin/../lib/libstdc++.so.6
 #2  0x00000000009a9b28 in magma::TaskQueue::dequeue(std::atomic<bool>&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:101
 #3  0x00000000009a9f11 in magma::TaskWorker::loop(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:160
 #4  0x0000000000b54b79 in run (this=0x7f51538f0d40)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:51
 #5  platform_thread_wrap(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:64
 #6  0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #7  0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 2 (Thread 0x7f51408cc700 (LWP 128624)):
 #0  0x00007f51f4f67a35 in pthread_cond_wait@@GLIBC_2.3.2 ()
    from /lib64/libpthread.so.0
 #1  0x00007f51f31568bc in std::condition_variable::wait(std::unique_lock<std::mutex>&) () from /opt/couchbase/bin/../lib/libstdc++.so.6
 #2  0x00000000009a9b28 in magma::TaskQueue::dequeue(std::atomic<bool>&) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:101
 #3  0x00000000009a9f11 in magma::TaskWorker::loop(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/util/worker.cc:160
 #4  0x0000000000b54b79 in run (this=0x7f51538f0d70)
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:51
 #5  platform_thread_wrap(void*) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:64
 #6  0x00007f51f4f63ea5 in start_thread () from /lib64/libpthread.so.0
 #7  0x00007f51f28a48dd in clone () from /lib64/libc.so.6
 
 Thread 1 (Thread 0x7f51f5ddac40 (LWP 128431)):
 #0  0x00007f51f28a4eb3 in epoll_wait () from /lib64/libc.so.6
 #1  0x00007f51f42383c5 in epoll_dispatch (base=0x7f51f108f300, 
     tv=<optimized out>)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/epoll.c:465
 #2  0x00007f51f422f376 in event_base_loop (base=0x7f51f108f300, flags=1)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/event.c:1998
 #3  0x0000000000bc8e37 in folly::EventBase::loopBody (
     this=this@entry=0x7f51f15eb500, flags=flags@entry=0, 
     ignoreKeepAlive=ignoreKeepAlive@entry=false)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/io/async/EventBase.cpp:397
 #4  0x0000000000bc9306 in folly::EventBase::loop (
     this=this@entry=0x7f51f15eb500)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/io/async/EventBase.cpp:315
 #5  0x0000000000bcacc6 in folly::EventBase::loopForever (this=0x7f51f15eb500)
     at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/io/async/EventBase.cpp:538
 #6  0x00000000005630eb in memcached_main(int, char**) ()
     at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/memcached.cc:1010
 #7  0x00007f51f27c8555 in __libc_start_main () from /lib64/libc.so.6
 #8  0x000000000055b587 in _start ()
     at /opt/gcc-10.2.0/include/c++/10.2.0/bits/char_traits.h:322
 Detaching from program: /opt/couchbase/bin/memcached, process 128431
 [Inferior 1 (process 128431) detached]

2021-11-24 08:48:42,134 | infra | DEBUG   | MainThread | [remote_util:execute_command_raw_jsch:3307] Running command on 172.23.121.126: ls /opt/couchbase/var/lib/couchbase/logs/memcached.log.*
2021-11-24 08:48:42,154 | infra | DEBUG   | MainThread | [remote_util:execute_command_raw_jsch:3307] Running command on 172.23.121.126: grep -r ' CRITICAL ' /opt/couchbase/var/lib/couchbase/logs/memcached.log.000454.txt | grep -v 'Rollback point not found' | grep -v 'No space left on device' | grep -v 'Permission denied' | grep -v 'write traffic will be disabled for this node'
2021-11-24 08:48:42,267 | infra | DEBUG   | MainThread | [remote_util:execute_command_raw_jsch:3307] Running command on 172.23.121.126: grep -r ' ERROR ' /opt/couchbase/var/lib/couchbase/logs/memcached.log.000454.txt | grep -v 'XERROR' | grep -v 'compaction failed for vb' | grep -v 'failed - Already exists'
2021-11-24 08:48:42,296 | infra | DEBUG   | MainThread | [remote_util:execute_command_raw_jsch:3307] Running command on 172.23.121.126: grep -r 'exception occurred in runloop' /opt/couchbase/var/lib/couchbase/logs/memcached.log.000454.txt
2021-11-24 08:48:42,316 | infra | DEBUG   | MainThread | [remote_util:execute_command_raw_jsch:3307] Running command on 172.23.121.126: grep -r 'Stream request failed because the snap start seqno' /opt/couchbase/var/lib/couchbase/logs/memcached.log.000454.txt
2021-11-24 08:48:42,342 | infra | DEBUG   | MainThread | [remote_util:execute_command_raw_jsch:3307] Running command on 172.23.121.126: ls /opt/couchbase/var/lib/couchbase/logs/sanitizers.log.*
2021-11-24 08:48:42,361 | test  | DEBUG   | MainThread | [basetestcase:check_coredump_exist:892] 172.23.121.126: No 'sanitizers.log.*' files found
2021-11-24 08:48:42,362 | infra | DEBUG   | MainThread | [remote_util:execute_command_raw_jsch:3307] Running command on 172.23.121.126: ls /opt/couchbase/var/lib/couchbase/logs/babysitter.log
2021-11-24 08:48:42,380 | infra | DEBUG   | MainThread | [remote_util:execute_command_raw_jsch:3307] Running command on 172.23.121.126: grep -r ' CRITICAL ' /opt/couchbase/var/lib/couchbase/logs/babysitter.log | grep -v 'Rollback point not found' | grep -v 'No space left on device' | grep -v 'Permission denied' | grep -v 'write traffic will be disabled for this node'
2021-11-24 08:48:42,401 | test  | INFO    | MainThread | [basetestcase:check_logs:832] Comparing timestamps: Log's latest timestamp: 2021-11-24 08:47:54, Test's start timestamp is 2021-11-23 20:57:23.174000
2021-11-24 08:48:42,404 | test  | INFO    | MainThread | [basetestcase:check_logs:832] Comparing timestamps: Log's latest timestamp: 2021-11-24 08:47:54, Test's start timestamp is 2021-11-23 20:57:23.174000
2021-11-24 08:48:42,404 | test  | INFO    | MainThread | [basetestcase:check_coredump_exist:941] unwanted messages in /opt/couchbase/var/lib/couchbase/logs/babysitter.log
2021-11-24 08:48:42,405 | test  | CRITICAL | MainThread | [basetestcase:check_coredump_exist:943] 172.23.121.126: Found ' CRITICAL ' logs - ['[ns_server:info,2021-11-23T10:19:08.264-08:00,babysitter_of_ns_1@cb.local:<0.133.0>:ns_port_server:log:226]memcached<0.133.0>: 2021-11-23T10:19:08.060307-08:00 CRITICAL *** Fatal error encountered during exception handling ***\n', 'memcached<0.133.0>: 2021-11-23T10:19:08.061478-08:00 CRITICAL Caught unhandled std::exception-derived exception. what(): ThrowExceptionUnderflowPolicy current:5009856 arg:5010384\n', 'memcached<0.133.0>: 2021-11-23T10:19:08.061498-08:00 CRITICAL Exception thrown from:\n', 'memcached<0.133.0>: 2021-11-23T10:19:08.061548-08:00 CRITICAL     #0  /opt/couchbase/bin/memcached() [0x400000+0x1341b6]\n', 'memcached<0.133.0>: 2021-11-23T10:19:08.061569-08:00 CRITICAL     #1  /opt/couchbase/bin/memcached() [0x400000+0x4aa388]\n', 'memcached<0.133.0>: 2021-11-23T10:19:08.061588-08:00 CRITICAL     #2  /opt/couchbase/bin/memcached() [0x400000+0x4aac78]\n', 'memcached<0.133.0>: 2021-11-23T10:19:08.061607-08:00 CRITICAL     #3  /opt/couchbase/bin/memcached() [0x400000+0x4ad110]\n', 'memcached<0.133.0>: 2021-11-23T10:19:08.061625-08:00 CRITICAL     #4  /opt/couchbase/bin/memcached() [0x400000+0x3c4da8]\n', 'memcached<0.133.0>: 2021-11-23T10:19:08.061639-08:00 CRITICAL     #5  /opt/couchbase/bin/memcached() [0x400000+0x3c52cb]\n', 'memcached<0.133.0>: 2021-11-23T10:19:08.061653-08:00 CRITICAL     #6  /opt/couchbase/bin/memcached() [0x400000+0x3c822c]\n', 'memcached<0.133.0>: 2021-11-23T10:19:08.061665-08:00 CRITICAL     #7  /opt/couchbase/bin/memcached() [0x400000+0x3c9248]\n', 'memcached<0.133.0>: 2021-11-23T10:19:08.061689-08:00 CRITICAL     #8  /opt/couchbase/bin/memcached() [0x400000+0x66d9d2]\n', 'memcached<0.133.0>: 2021-11-23T10:19:08.061714-08:00 CRITICAL     #9  /opt/couchbase/bin/memcached() [0x400000+0x66abe5]\n', 'memcached<0.133.0>: 2021-11-23T10:19:08.061741-08:00 CRITICAL     #10 /opt/couchbase/bin/memcached() [0x400000+0x7bf750]\n', 'memcached<0.133.0>: 2021-11-23T10:19:08.061763-08:00 CRITICAL     #11 /opt/couchbase/bin/memcached() [0x400000+0x7a750a]\n', 'memcached<0.133.0>: 2021-11-23T10:19:08.061782-08:00 CRITICAL     #12 /opt/couchbase/bin/memcached() [0x400000+0x7c2709]\n', 'memcached<0.133.0>: 2021-11-23T10:19:08.061801-08:00 CRITICAL     #13 /opt/couchbase/bin/memcached() [0x400000+0x66a874]\n', 'memcached<0.133.0>: 2021-11-23T10:19:08.061880-08:00 CRITICAL     #14 /opt/couchbase/bin/../lib/libstdc++.so.6() [0x7fc5970ef000+0xcdd40]\n', 'memcached<0.133.0>: 2021-11-23T10:19:08.061887-08:00 CRITICAL     #15 /lib64/libpthread.so.0() [0x7fc598fbd000+0x7ea5]\n', 'memcached<0.133.0>: 2021-11-23T10:19:08.061921-08:00 CRITICAL     #16 /lib64/libc.so.6(clone+0x6d) [0x7fc596807000+0xfe8dd]\n', '[ns_server:info,2021-11-23T10:19:09.056-08:00,babysitter_of_ns_1@cb.local:<0.133.0>:ns_port_server:log:226]memcached<0.133.0>: CRITICAL Breakpad caught a crash (Couchbase version 7.1.0-1745). Writing crash dump to /opt/couchbase/var/lib/couchbase/crash/e70e0955-3bc7-4477-3ffebfaf-dd52a39b.dmp before terminating.\n', '[ns_server:info,2021-11-23T10:19:10.202-08:00,babysitter_of_ns_1@cb.local:<0.21966.2>:ns_port_server:log:226]memcached<0.21966.2>: 2021-11-23T10:19:10.001179-08:00 CRITICAL Detected previous crash\n', 'memcached<0.21966.2>: 2021-11-23T10:19:10.001266-08:00 CRITICAL Breakpad caught a crash (Couchbase version 7.1.0-1745). Writing crash dump to /opt/couchbase/var/lib/couchbase/crash/e70e0955-3bc7-4477-3ffebfaf-dd52a39b.dmp before terminating.\n', 'memcached<0.21966.2>: 2021-11-23T10:19:10.001279-08:00 CRITICAL Stack backtrace of crashed thread:\n', 'memcached<0.21966.2>: 2021-11-23T10:19:10.001281-08:00 CRITICAL    #0  /opt/couchbase/bin/memcached() [0x400000+0x6f0268]\n', 'memcached<0.21966.2>: 2021-11-23T10:19:10.001284-08:00 CRITICAL    #1  /opt/couchbase/bin/memcached(_ZN15google_breakpad16ExceptionHandler12GenerateDumpEPNS0_12CrashContextE+0x3ea) [0x400000+0x74045a]\n', 'memcached<0.21966.2>: 2021-11-23T10:19:10.001286-08:00 CRITICAL    #2  /opt/couchbase/bin/memcached(_ZN15google_breakpad16ExceptionHandler13SignalHandlerEiP9siginfo_tPv+0xb8) [0x400000+0x740798]\n', 'memcached<0.21966.2>: 2021-11-23T10:19:10.001288-08:00 CRITICAL    #3  /lib64/libpthread.so.0() [0x7fc598fbd000+0xf630]\n', 'memcached<0.21966.2>: 2021-11-23T10:19:10.001289-08:00 CRITICAL    #4  /lib64/libc.so.6(gsignal+0x37) [0x7fc596807000+0x36387]\n', 'memcached<0.21966.2>: 2021-11-23T10:19:10.001291-08:00 CRITICAL    #5  /lib64/libc.so.6(abort+0x148) [0x7fc596807000+0x37a78]\n', 'memcached<0.21966.2>: 2021-11-23T10:19:10.001293-08:00 CRITICAL    #6  /opt/couchbase/bin/../lib/libstdc++.so.6() [0x7fc5970ef000+0x9963c]\n', 'memcached<0.21966.2>: 2021-11-23T10:19:10.001294-08:00 CRITICAL    #7  /opt/couchbase/bin/memcached() [0x400000+0x6fd3db]\n', 'memcached<0.21966.2>: 2021-11-23T10:19:10.001308-08:00 CRITICAL    #8  /opt/couchbase/bin/../lib/libstdc++.so.6() [0x7fc5970ef000+0xa48f6]\n', 'memcached<0.21966.2>: 2021-11-23T10:19:10.001317-08:00 CRITICAL    #9  /opt/couchbase/bin/../lib/libstdc++.so.6() [0x7fc5970ef000+0xa4961]\n', 'memcached<0.21966.2>: 2021-11-23T10:19:10.001321-08:00 CRITICAL    #10 /opt/couchbase/bin/../lib/libstdc++.so.6() [0x7fc5970ef000+0xa4bf4]\n', 'memcached<0.21966.2>: 2021-11-23T10:19:10.001324-08:00 CRITICAL    #11 /opt/couchbase/bin/memcached() [0x400000+0x1342ca]\n', 'memcached<0.21966.2>: 2021-11-23T10:19:10.001326-08:00 CRITICAL    #12 /opt/couchbase/bin/memcached() [0x400000+0x4aa388]\n', 'memcached<0.21966.2>: 2021-11-23T10:19:10.001328-08:00 CRITICAL    #13 /opt/couchbase/bin/memcached() [0x400000+0x4aac78]\n', 'memcached<0.21966.2>: 2021-11-23T10:19:10.001331-08:00 CRITICAL    #14 /opt/couchbase/bin/memcached() [0x400000+0x4ad110]\n', 'memcached<0.21966.2>: 2021-11-23T10:19:10.001335-08:00 CRITICAL    #15 /opt/couchbase/bin/memcached() [0x400000+0x3c4da8]\n', 'memcached<0.21966.2>: 2021-11-23T10:19:10.001337-08:00 CRITICAL    #16 /opt/couchbase/bin/memcached() [0x400000+0x3c52cb]\n', 'memcached<0.21966.2>: 2021-11-23T10:19:10.001342-08:00 CRITICAL    #17 /opt/couchbase/bin/memcached() [0x400000+0x3c822c]\n', 'memcached<0.21966.2>: 2021-11-23T10:19:10.001343-08:00 CRITICAL    #18 /opt/couchbase/bin/memcached() [0x400000+0x3c9248]\n', 'memcached<0.21966.2>: 2021-11-23T10:19:10.001381-08:00 CRITICAL    #19 /opt/couchbase/bin/memcached() [0x400000+0x66d9d2]\n', 'memcached<0.21966.2>: 2021-11-23T10:19:10.001385-08:00 CRITICAL    #20 /opt/couchbase/bin/memcached() [0x400000+0x66abe5]\n', 'memcached<0.21966.2>: 2021-11-23T10:19:10.001389-08:00 CRITICAL    #21 /opt/couchbase/bin/memcached() [0x400000+0x7bf750]\n', 'memcached<0.21966.2>: 2021-11-23T10:19:10.001392-08:00 CRITICAL    #22 /opt/couchbase/bin/memcached() [0x400000+0x7a750a]\n', 'memcached<0.21966.2>: 2021-11-23T10:19:10.001394-08:00 CRITICAL    #23 /opt/couchbase/bin/memcached() [0x400000+0x7c2709]\n', 'memcached<0.21966.2>: 2021-11-23T10:19:10.001395-08:00 CRITICAL    #24 /opt/couchbase/bin/memcached() [0x400000+0x66a874]\n', 'memcached<0.21966.2>: 2021-11-23T10:19:10.001399-08:00 CRITICAL    #25 /opt/couchbase/bin/../lib/libstdc++.so.6() [0x7fc5970ef000+0xcdd40]\n', 'memcached<0.21966.2>: 2021-11-23T10:19:10.001401-08:00 CRITICAL    #26 /lib64/libpthread.so.0() [0x7fc598fbd000+0x7ea5]\n', 'memcached<0.21966.2>: 2021-11-23T10:19:10.001404-08:00 CRITICAL    #27 /lib64/libc.so.6(clone+0x6d) [0x7fc596807000+0xfe8dd]\n', 'memcached<0.13782.2>: 2021-11-24T08:47:52.533964-08:00 CRITICAL *** Fatal error encountered during exception handling ***\n', 'memcached<0.13782.2>: 2021-11-24T08:47:52.534064-08:00 CRITICAL Caught unhandled std::exception-derived exception. what(): std::exception\n', '[ns_server:info,2021-11-24T08:47:54.054-08:00,babysitter_of_ns_1@cb.local:<0.13782.2>:ns_port_server:log:226]memcached<0.13782.2>: CRITICAL Breakpad caught a crash (Couchbase version 7.1.0-1745). Writing crash dump to /opt/couchbase/var/lib/couchbase/crash/e299ceb3-8985-4ce0-0c4601b6-3fda1379.dmp before terminating.\n', '[ns_server:info,2021-11-24T08:47:55.133-08:00,babysitter_of_ns_1@cb.local:<0.29312.3>:ns_port_server:log:226]memcached<0.29312.3>: 2021-11-24T08:47:54.930536-08:00 CRITICAL Detected previous crash\n', 'memcached<0.29312.3>: 2021-11-24T08:47:54.930637-08:00 CRITICAL Breakpad caught a crash (Couchbase version 7.1.0-1745). Writing crash dump to /opt/couchbase/var/lib/couchbase/crash/e299ceb3-8985-4ce0-0c4601b6-3fda1379.dmp before terminating.\n', 'memcached<0.29312.3>: 2021-11-24T08:47:54.930641-08:00 CRITICAL Stack backtrace of crashed thread:\n', 'memcached<0.29312.3>: 2021-11-24T08:47:54.930646-08:00 CRITICAL    #0  /opt/couchbase/bin/memcached() [0x400000+0x6f0268]\n', 'memcached<0.29312.3>: 2021-11-24T08:47:54.930648-08:00 CRITICAL    #1  /opt/couchbase/bin/memcached(_ZN15google_breakpad16ExceptionHandler12GenerateDumpEPNS0_12CrashContextE+0x3ea) [0x400000+0x74045a]\n', 'memcached<0.29312.3>: 2021-11-24T08:47:54.930650-08:00 CRITICAL    #2  /opt/couchbase/bin/memcached(_ZN15google_breakpad16ExceptionHandler13SignalHandlerEiP9siginfo_tPv+0xb8) [0x400000+0x740798]\n', 'memcached<0.29312.3>: 2021-11-24T08:47:54.930652-08:00 CRITICAL    #3  /lib64/libpthread.so.0() [0x7f56e4dc3000+0xf630]\n', 'memcached<0.29312.3>: 2021-11-24T08:47:54.930697-08:00 CRITICAL    #4  /lib64/libc.so.6(gsignal+0x37) [0x7f56e260d000+0x36387]\n', 'memcached<0.29312.3>: 2021-11-24T08:47:54.930701-08:00 CRITICAL    #5  /lib64/libc.so.6(abort+0x148) [0x7f56e260d000+0x37a78]\n', 'memcached<0.29312.3>: 2021-11-24T08:47:54.930703-08:00 CRITICAL    #6  /opt/couchbase/bin/../lib/libstdc++.so.6() [0x7f56e2ef5000+0x9963c]\n', 'memcached<0.29312.3>: 2021-11-24T08:47:54.930889-08:00 CRITICAL    #7  /opt/couchbase/bin/memcached() [0x400000+0x6fd3db]\n', 'memcached<0.29312.3>: 2021-11-24T08:47:54.930891-08:00 CRITICAL    #8  /opt/couchbase/bin/../lib/libstdc++.so.6() [0x7f56e2ef5000+0xa48f6]\n', 'memcached<0.29312.3>: 2021-11-24T08:47:54.930893-08:00 CRITICAL    #9  /opt/couchbase/bin/../lib/libstdc++.so.6() [0x7f56e2ef5000+0xa4961]\n', 'memcached<0.29312.3>: 2021-11-24T08:47:54.930895-08:00 CRITICAL    #10 /opt/couchbase/bin/../lib/libstdc++.so.6() [0x7f56e2ef5000+0xa4bf4]\n', 'memcached<0.29312.3>: 2021-11-24T08:47:54.930897-08:00 CRITICAL    #11 /opt/couchbase/bin/memcached() [0x400000+0xc272e]\n', 'memcached<0.29312.3>: 2021-11-24T08:47:54.930899-08:00 CRITICAL    #12 /opt/couchbase/bin/memcached() [0x400000+0x3f784c]\n', 'memcached<0.29312.3>: 2021-11-24T08:47:54.930900-08:00 CRITICAL    #13 /opt/couchbase/bin/memcached() [0x400000+0x3fe273]\n', 'memcached<0.29312.3>: 2021-11-24T08:47:54.930903-08:00 CRITICAL    #14 /opt/couchbase/bin/memcached() [0x400000+0x31f484]\n', 'memcached<0.29312.3>: 2021-11-24T08:47:54.930905-08:00 CRITICAL    #15 /opt/couchbase/bin/memcached() [0x400000+0x440158]\n', 'memcached<0.29312.3>: 2021-11-24T08:47:54.930907-08:00 CRITICAL    #16 /opt/couchbase/bin/memcached() [0x400000+0x66d9d2]\n', 'memcached<0.29312.3>: 2021-11-24T08:47:54.930908-08:00 CRITICAL    #17 /opt/couchbase/bin/memcached() [0x400000+0x66abe5]\n', 'memcached<0.29312.3>: 2021-11-24T08:47:54.930910-08:00 CRITICAL    #18 /opt/couchbase/bin/memcached() [0x400000+0x7bf750]\n', 'memcached<0.29312.3>: 2021-11-24T08:47:54.930911-08:00 CRITICAL    #19 /opt/couchbase/bin/memcached() [0x400000+0x7a750a]\n', 'memcached<0.29312.3>: 2021-11-24T08:47:54.930913-08:00 CRITICAL    #20 /opt/couchbase/bin/memcached() [0x400000+0x7c2709]\n', 'memcached<0.29312.3>: 2021-11-24T08:47:54.930914-08:00 CRITICAL    #21 /opt/couchbase/bin/memcached() [0x400000+0x66a874]\n', 'memcached<0.29312.3>: 2021-11-24T08:47:54.930927-08:00 CRITICAL    #22 /opt/couchbase/bin/../lib/libstdc++.so.6() [0x7f56e2ef5000+0xcdd40]\n', 'memcached<0.29312.3>: 2021-11-24T08:47:54.930929-08:00 CRITICAL    #23 /lib64/libpthread.so.0() [0x7f56e4dc3000+0x7ea5]\n', 'memcached<0.29312.3>: 2021-11-24T08:47:54.930930-08:00 CRITICAL    #24 /lib64/libc.so.6(clone+0x6d) [0x7f56e260d000+0xfe8dd]\n']