GNU gdb (GDB) Red Hat Enterprise Linux 7.6.1-114.el7
Copyright (C) 2013 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
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For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /opt/couchbase/bin/memcached...Reading symbols from /usr/lib/debug/opt/couchbase/bin/memcached.debug...done.
done.
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Core was generated by `/opt/couchbase/bin/memcached -C /opt/couchbase/var/lib/couchbase/config/memcach'.
#0  0x00000000008efce0 in pread_bin_internal (max_header_size=0, ret_ptr=0x7f88fe7e9ba8, pos=<optimized out>, file=0x7f88d588ec60)
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/couchstore/src/couch_file_read.cc:185

Thread 33 (LWP 85625):
#0  0x00007f8955c44d12 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f8957760e51 in background_thread_sleep (tsdn=<optimized out>, interval=10000000000, 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=0x7f88dd1ee000) at src/background_thread.c:497
#4  background_thread_entry (ind_arg=<optimized out>) at src/background_thread.c:522
#5  0x00007f8955c40dd5 in start_thread () from /lib64/libpthread.so.0
#6  0x00007f8955969ead in clone () from /lib64/libc.so.6

Thread 32 (LWP 85607):
#0  0x00007f8955c44d12 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f8957760e51 in background_thread_sleep (tsdn=<optimized out>, interval=10000000000, 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=0x7f88df2ed000) at src/background_thread.c:497
#4  background_thread_entry (ind_arg=<optimized out>) at src/background_thread.c:522
#5  0x00007f8955c40dd5 in start_thread () from /lib64/libpthread.so.0
#6  0x00007f8955969ead in clone () from /lib64/libc.so.6

Thread 31 (LWP 85594):
#0  0x00007f895596a483 in epoll_wait () from /lib64/libc.so.6
#1  0x00007f89575283c5 in epoll_dispatch (base=0x7f894193d000, tv=<optimized out>)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/epoll.c:465
#2  0x00007f895751f376 in event_base_loop (base=0x7f894193d000, flags=1)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/event.c:1998
#3  0x0000000000adf607 in folly::EventBase::loopBody (this=this@entry=0x7f894190d480, 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  0x0000000000adfad6 in folly::EventBase::loop (this=this@entry=0x7f894190d480)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/io/async/EventBase.cpp:315
#5  0x0000000000ae1496 in folly::EventBase::loopForever (this=0x7f894190d480)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/io/async/EventBase.cpp:538
#6  0x0000000000aceab9 in folly::IOThreadPoolExecutor::threadRun (this=0x7f8941854c80, thread=...)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/IOThreadPoolExecutor.cpp:195
#7  0x0000000000ada249 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 0x00007f895643cd40 in execute_native_thread_routine () at /tmp/deploy/objdir/../gcc-10.2.0/libstdc++-v3/src/c++11/thread.cc:80
#13 0x00007f8955c40dd5 in start_thread () from /lib64/libpthread.so.0
#14 0x00007f8955969ead in clone () from /lib64/libc.so.6

Thread 30 (LWP 85593):
#0  0x00007f89559641c9 in syscall () from /lib64/libc.so.6
#1  0x0000000000ab9a9d in nativeFutexWaitImpl (waitMask=<optimized out>, absSteadyTime=<optimized out>, absSystemTime=<optimized out>, 
    expected=<optimized out>, addr=<optimized out>)
    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=<optimized out>, expected=<optimized out>, absSystemTime=<optimized out>, absSteadyTime=<optimized out>, 
    waitMask=<optimized out>)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/Futex.cpp:254
#3  0x0000000000ac0d5a 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=0x7f88fd7e7d3c)
    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=0x7f88fd7e7d3c, 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  0x0000000000adae6f 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::Baton<true, std::atomic>::tryWaitSlow<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (
    this=this@entry=0x7f88fd7e7d3c, deadline=..., opt=...)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/Baton.h:308
#8  0x0000000000ade73f in wait (opt=..., this=0x7f88fd7e7d3c)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/Baton.h:178
#9  folly::EventBase::runInEventBaseThreadAndWait(folly::Function<void ()>) (this=this@entry=0x7f894190d480, fn=...)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/io/async/EventBase.cpp:673
#10 0x0000000000691fe9 in FollyExecutorPool::schedule(std::shared_ptr<GlobalTask>) () at /opt/gcc-10.2.0/include/c++/10.2.0/new:175
#11 0x00000000006b2431 in KVBucket::visitAsync(std::unique_ptr<PausableVBucketVisitor, std::default_delete<PausableVBucketVisitor> >, char const*, TaskId, std::chrono::duration<long, std::ratio<1l, 1000000l> >) () at /opt/gcc-10.2.0/include/c++/10.2.0/ext/atomicity.h:100
#12 0x00000000007e78de in DurabilityTimeoutTask::run() ()
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/durability_timeout_task.cc:55
#13 0x000000000069bee7 in GlobalTask::execute() () at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/globaltask.cc:68
#14 0x0000000000697030 in FollyExecutorPool::TaskProxy::scheduleViaCPUPool()::{lambda()#1}::operator()() const (__closure=0x7f88fd7e8630)
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/folly_executorpool.cc:190
#15 0x0000000000697030 in FollyExecutorPool::TaskProxy::timeoutExpired (this=<optimized out>)
#16 0x0000000000ad7290 in operator() (this=0x7f88fd7e8630)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/Function.h:416
#17 folly::ThreadPoolExecutor::runTask(std::shared_ptr<folly::ThreadPoolExecutor::Thread> const&, folly::ThreadPoolExecutor::Task&&) (
    this=0x7f895454c400, thread=..., task=<unknown type in /usr/lib/debug/opt/couchbase/bin/memcached.debug, CU 0x82da4ea, DIE 0x8320944>)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/ThreadPoolExecutor.cpp:97
#18 0x0000000000abef6a in folly::CPUThreadPoolExecutor::threadRun (this=0x7f895454c400, thread=...)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/CPUThreadPoolExecutor.cpp:265
#19 0x0000000000ada249 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
#20 __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
#21 __call<void, 0, 1> (__args=<optimized out>, this=<optimized out>) at /usr/local/include/c++/7.3.0/functional:467
#22 operator()<> (this=<optimized out>) at /usr/local/include/c++/7.3.0/functional:551
#23 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
#24 0x00000000006955bd in operator() (this=0x7f89482eb580)
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/folly_executorpool.cc:48
#25 operator() (__closure=0x7f89482eb580) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/folly_executorpool.cc:48
#26 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
#27 0x00007f895643cd40 in execute_native_thread_routine () at /tmp/deploy/objdir/../gcc-10.2.0/libstdc++-v3/src/c++11/thread.cc:80
#28 0x00007f8955c40dd5 in start_thread () from /lib64/libpthread.so.0
#29 0x00007f8955969ead in clone () from /lib64/libc.so.6

Thread 29 (LWP 85592):
#0  0x00007f8955c42c8d in pthread_mutex_lock () from /lib64/libpthread.so.0
#1  0x00000000006c5992 in KVShard::getBucket(Vbid) const () at /opt/gcc-10.2.0/include/c++/10.2.0/x86_64-pc-linux-gnu/bits/gthr-default.h:749
#2  0x00000000006ffee5 in VBucketMap::getBucket (this=<optimized out>, id=...)
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/include/memcached/vbucket.h:62
#3  0x00000000006a9a3f in VBCBAdaptor::run() () at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/kv_bucket.h:227
#4  0x000000000069bee7 in GlobalTask::execute() () at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/globaltask.cc:68
#5  0x0000000000697030 in FollyExecutorPool::TaskProxy::scheduleViaCPUPool()::{lambda()#1}::operator()() const (__closure=0x7f88fdfe9630)
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/folly_executorpool.cc:190
#6  0x0000000000697030 in FollyExecutorPool::TaskProxy::timeoutExpired (this=<optimized out>)
#7  0x0000000000ad7290 in operator() (this=0x7f88fdfe9630)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/Function.h:416
#8  folly::ThreadPoolExecutor::runTask(std::shared_ptr<folly::ThreadPoolExecutor::Thread> const&, folly::ThreadPoolExecutor::Task&&) (
    this=0x7f895454c400, thread=..., task=<unknown type in /usr/lib/debug/opt/couchbase/bin/memcached.debug, CU 0x82da4ea, DIE 0x8320944>)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/ThreadPoolExecutor.cpp:97
#9  0x0000000000abef6a in folly::CPUThreadPoolExecutor::threadRun (this=0x7f895454c400, thread=...)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/CPUThreadPoolExecutor.cpp:265
#10 0x0000000000ada249 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
#11 __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
#12 __call<void, 0, 1> (__args=<optimized out>, this=<optimized out>) at /usr/local/include/c++/7.3.0/functional:467
#13 operator()<> (this=<optimized out>) at /usr/local/include/c++/7.3.0/functional:551
#14 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
#15 0x00000000006955bd in operator() (this=0x7f89482eb540)
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/folly_executorpool.cc:48
#16 operator() (__closure=0x7f89482eb540) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/folly_executorpool.cc:48
#17 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
#18 0x00007f895643cd40 in execute_native_thread_routine () at /tmp/deploy/objdir/../gcc-10.2.0/libstdc++-v3/src/c++11/thread.cc:80
#19 0x00007f8955c40dd5 in start_thread () from /lib64/libpthread.so.0
#20 0x00007f8955969ead in clone () from /lib64/libc.so.6

Thread 28 (LWP 85590):
#0  0x00007f89559641c9 in syscall () from /lib64/libc.so.6
#1  0x0000000000ab9a9d in nativeFutexWaitImpl (waitMask=<optimized out>, absSteadyTime=<optimized out>, absSystemTime=<optimized out>, 
    expected=<optimized out>, addr=<optimized out>)
    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=<optimized out>, expected=<optimized out>, absSystemTime=<optimized out>, absSteadyTime=<optimized out>, 
    waitMask=<optimized out>)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/Futex.cpp:254
#3  0x0000000000ac0d5a 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=<optimized out>, deadline=..., expected=<optimized out>, futex=<optimized out>)
    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=<optimized out>, expected=<optimized out>, deadline=..., waitMask=<optimized out>)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/Futex-inl.h:123
#5  0x0000000000ac6dd7 in folly::SaturatingSemaphore<true, std::atomic>::tryWaitSlow<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x7f89197db3a0, deadline=..., opt=...)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/MemoryIdler.h:194
#6  0x0000000000ac7306 in 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=0x7f8914001b40, deadline=...)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/SaturatingSemaphore.h:179
#7  0x0000000000acaa60 in folly::UnboundedBlockingQueue<folly::CPUThreadPoolExecutor::CPUTask>::try_take_for (this=0x7f8914001b00, time=...)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/LifoSem.h:498
#8  0x0000000000abeef7 in folly::CPUThreadPoolExecutor::threadRun (this=0x7f895454a000, thread=...)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/CPUThreadPoolExecutor.cpp:243
#9  0x0000000000ada249 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
#10 __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
#11 __call<void, 0, 1> (__args=<optimized out>, this=<optimized out>) at /usr/local/include/c++/7.3.0/functional:467
#12 operator()<> (this=<optimized out>) at /usr/local/include/c++/7.3.0/functional:551
#13 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
#14 0x00000000006955bd in operator() (this=0x7f89482eb380)
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/folly_executorpool.cc:48
#15 operator() (__closure=0x7f89482eb380) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/folly_executorpool.cc:48
#16 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
#17 0x00007f895643cd40 in execute_native_thread_routine () at /tmp/deploy/objdir/../gcc-10.2.0/libstdc++-v3/src/c++11/thread.cc:80
#18 0x00007f8955c40dd5 in start_thread () from /lib64/libpthread.so.0
#19 0x00007f8955969ead in clone () from /lib64/libc.so.6

Thread 27 (LWP 85589):
#0  0x00007f89559641c9 in syscall () from /lib64/libc.so.6
#1  0x0000000000ab9a9d in nativeFutexWaitImpl (waitMask=<optimized out>, absSteadyTime=<optimized out>, absSystemTime=<optimized out>, 
    expected=<optimized out>, addr=<optimized out>)
    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=<optimized out>, expected=<optimized out>, absSystemTime=<optimized out>, absSteadyTime=<optimized out>, 
    waitMask=<optimized out>)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/Futex.cpp:254
#3  0x0000000000ac0d5a 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=<optimized out>, deadline=..., expected=<optimized out>, futex=<optimized out>)
    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=<optimized out>, expected=<optimized out>, deadline=..., waitMask=<optimized out>)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/Futex-inl.h:123
#5  0x0000000000ac6dd7 in folly::SaturatingSemaphore<true, std::atomic>::tryWaitSlow<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x7f89197d9ea0, deadline=..., opt=...)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/MemoryIdler.h:194
#6  0x0000000000ac7306 in 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=0x7f8914001b40, deadline=...)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/SaturatingSemaphore.h:179
#7  0x0000000000acaa60 in folly::UnboundedBlockingQueue<folly::CPUThreadPoolExecutor::CPUTask>::try_take_for (this=0x7f8914001b00, time=...)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/LifoSem.h:498
#8  0x0000000000abeef7 in folly::CPUThreadPoolExecutor::threadRun (this=0x7f895454a000, thread=...)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/CPUThreadPoolExecutor.cpp:243
#9  0x0000000000ada249 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
#10 __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
#11 __call<void, 0, 1> (__args=<optimized out>, this=<optimized out>) at /usr/local/include/c++/7.3.0/functional:467
#12 operator()<> (this=<optimized out>) at /usr/local/include/c++/7.3.0/functional:551
#13 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
#14 0x00000000006955bd in operator() (this=0x7f89482eb300)
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/folly_executorpool.cc:48
#15 operator() (__closure=0x7f89482eb300) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/folly_executorpool.cc:48
#16 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
#17 0x00007f895643cd40 in execute_native_thread_routine () at /tmp/deploy/objdir/../gcc-10.2.0/libstdc++-v3/src/c++11/thread.cc:80
#18 0x00007f8955c40dd5 in start_thread () from /lib64/libpthread.so.0
#19 0x00007f8955969ead in clone () from /lib64/libc.so.6

Thread 26 (LWP 85587):
#0  atomic_store_p (mo=atomic_memory_order_release, val=0x307f88d5c29580, a=0x7f88fcaa9f90) at include/jemalloc/internal/atomic.h:62
#1  rtree_leaf_elm_write (slab=<optimized out>, szind=3586142632, extent=<optimized out>, elm=0x7f88fcaa9f90, rtree=0x7f89579fe660 <je_extents_rtree>, 
    tsdn=<optimized out>) at include/jemalloc/internal/rtree.h:301
#2  extent_rtree_write_acquired (tsdn=0x7f8957bfead0 <je_extent_mutex_pool+1008>, slab=<optimized out>, szind=3586142632, extent=<optimized out>, 
    elm_b=0x7f88fcaaa088, elm_a=0x7f88fcaa9f90) at src/extent.c:723
#3  extent_split_impl (tsdn=tsdn@entry=0x7f88fffee000, arena=arena@entry=0x7f88d5c008c0, r_extent_hooks=r_extent_hooks@entry=0x7f88fffdbef8, 
    extent=<optimized out>, size_a=size_a@entry=131072, szind_a=szind_a@entry=48, slab_a=<optimized out>, size_b=<optimized out>, 
    szind_b=<optimized out>, slab_b=<optimized out>, growing_retained=false) at src/extent.c:2156
#4  0x00007f895779166f in extent_split_interior (tsdn=tsdn@entry=0x7f88fffee000, arena=arena@entry=0x7f88d5c008c0, 
    r_extent_hooks=r_extent_hooks@entry=0x7f88fffdbef8, rtree_ctx=rtree_ctx@entry=0x7f88fffee030, extent=extent@entry=0x7f88fffdbc68, 
    lead=lead@entry=0x7f88fffdbc70, trail=0x7f88fffdbc78, to_leak=0x7f88fffdbc80, to_salvage=0x7f88fffdbc88, size=131072, pad=0, alignment=64, 
    slab=false, szind=48, growing_retained=false, new_addr=0x0) at src/extent.c:1017
#5  0x00007f8957794b21 in extent_recycle_split (growing_retained=<optimized out>, extent=<optimized out>, szind=48, slab=false, alignment=64, pad=0, 
    size=131072, new_addr=0x0, extents=0x7f88d5c031a8, rtree_ctx=0x7f88fffee030, r_extent_hooks=0x7f88fffdbef8, arena=0x7f88d5c008c0, 
    tsdn=0x7f88fffee000) at src/extent.c:1066
#6  extent_recycle (tsdn=tsdn@entry=0x7f88fffee000, arena=arena@entry=0x7f88d5c008c0, r_extent_hooks=r_extent_hooks@entry=0x7f88fffdbef8, 
    extents=extents@entry=0x7f88d5c031a8, new_addr=new_addr@entry=0x0, size=size@entry=131072, pad=<optimized out>, alignment=<optimized out>, 
    slab=<optimized out>, szind=<optimized out>, zero=<optimized out>, commit=<optimized out>, growing_retained=<optimized out>) at src/extent.c:1148
#7  0x00007f8957795978 in je_extents_alloc (tsdn=tsdn@entry=0x7f88fffee000, arena=arena@entry=0x7f88d5c008c0, 
    r_extent_hooks=r_extent_hooks@entry=0x7f88fffdbef8, extents=extents@entry=0x7f88d5c031a8, new_addr=new_addr@entry=0x0, size=size@entry=131072, 
    pad=0, alignment=64, slab=false, szind=48, zero=0x7f88fffdbf5f, commit=0x7f88fffdbef7) at src/extent.c:545
#8  0x00007f8957759113 in je_arena_extent_alloc_large (tsdn=tsdn@entry=0x7f88fffee000, arena=arena@entry=0x7f88d5c008c0, usize=usize@entry=131072, 
    alignment=alignment@entry=64, zero=zero@entry=0x7f88fffdbf5f) at src/arena.c:438
#9  0x00007f8957798d35 in je_large_palloc (zero=<optimized out>, alignment=64, usize=131072, arena=0x7f88d5c008c0, tsdn=0x7f88fffee000)
    at src/large.c:47
#10 je_large_malloc (tsdn=0x7f88fffee000, arena=<optimized out>, usize=131072, zero=<optimized out>) at src/large.c:17
#11 0x00007f895775d236 in je_arena_palloc (tsdn=tsdn@entry=0x7f88fffee000, arena=0x7f88d5c008c0, usize=usize@entry=131072, 
    alignment=alignment@entry=8, zero=<optimized out>, tcache=tcache@entry=0x7f88d7ae9000) at src/arena.c:1544
#12 0x00007f895774e804 in ipallocztm (arena=<optimized out>, is_internal=false, tcache=0x7f88d7ae9000, zero=<optimized out>, alignment=8, 
    usize=131072, tsdn=<optimized out>) at include/jemalloc/internal/jemalloc_internal_inlines_c.h:78
#13 ipalloct (arena=<optimized out>, tcache=0x7f88d7ae9000, zero=<optimized out>, alignment=8, usize=131072, tsdn=<optimized out>)
    at include/jemalloc/internal/jemalloc_internal_inlines_c.h:89
#14 imalloc_no_sample (ind=<optimized out>, usize=131072, size=131072, tsd=0x7f88fffee000, dopts=<synthetic pointer>, sopts=<synthetic pointer>)
    at src/jemalloc.c:1945
#15 imalloc_body (tsd=0x7f88fffee000, dopts=<synthetic pointer>, sopts=<synthetic pointer>) at src/jemalloc.c:2123
#16 imalloc (dopts=<synthetic pointer>, sopts=<synthetic pointer>) at src/jemalloc.c:2258
#17 je_mallocx (size=<optimized out>, flags=<optimized out>) at src/jemalloc.c:3137
#18 0x0000000000a4534f in aligned_alloc (size=131072, alignment=<optimized out>)
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_malloc_arena.cc:66
#19 cb_aligned_alloc (alignment=<optimized out>, size=size@entry=131072)
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_malloc_arena.cc:66
#20 0x00000000008f6051 in FileBuffer (_mprotect_enabled=false, _write_validation_enabled=<optimized out>, _tracing_enabled=false, 
    _capacity=<optimized out>, _owner=..., this=0x7f88d551dfc0)
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/couchstore/src/iobuffer.cc:65
#21 make_unique<FileBuffer, BufferedFileHandle&, int, bool&, bool&, bool&> () at /opt/gcc-10.2.0/include/c++/10.2.0/bits/unique_ptr.h:962
#22 BufferedFileOps::allocate_write_buffer(couch_file_handle_opaque*) ()
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/couchstore/src/iobuffer.cc:566
#23 0x00000000008f6c1b in pwrite (offset=41059, nbyte=8, buf=0x7f88fffdc1d8, handle=0x7f88d5517d20, errinfo=0x7f88d5524b60, this=<optimized out>)
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/couchstore/src/iobuffer.cc:678
#24 BufferedFileOps::pwrite(couchstore_error_info_t*, couch_file_handle_opaque*, void const*, unsigned long, long) ()
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/couchstore/src/iobuffer.cc:662
#25 0x00000000008efdda in write_entire_buffer (file=file@entry=0x7f88d5524b40, buf=buf@entry=0x7f88fffdc1d8, nbytes=nbytes@entry=8, 
    offset=offset@entry=41059) at /home/couchbase/jenkins/workspace/couchbase-server-unix/couchstore/src/couch_file_write.cc:45
#26 0x00000000008f0127 in raw_write (pos=41059, buf=<synthetic pointer>, file=0x7f88d5524b40, diskBlockType=Data)
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/couchstore/src/couch_file_write.cc:81
#27 db_write_buf (file=file@entry=0x7f88d5524b40, buf=buf@entry=0x7f88fffdc220, pos=pos@entry=0x7f88fffdc2c0, disk_size=disk_size@entry=0x7f88fffdc2c8)
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/couchstore/src/couch_file_write.cc:155
#28 0x00000000008f0290 in db_write_buf_compressed(tree_file*, sized_buf const*, long*, unsigned long*) ()
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/couchstore/src/couch_file_write.cc:203
#29 0x00000000008f9a70 in flush_mr_partial (res=0x7f88d562e290, res@entry=<error reading variable: Cannot access memory at address 0x7f88fffec318>, 
    mr_quota=<optimized out>) at /home/couchbase/jenkins/workspace/couchbase-server-unix/couchstore/src/btree_modify.cc:253

Thread 25 (LWP 85586):
#0  0x00007f89559641c9 in syscall () from /lib64/libc.so.6
#1  0x0000000000ab9a9d in nativeFutexWaitImpl (waitMask=<optimized out>, absSteadyTime=<optimized out>, absSystemTime=<optimized out>, 
    expected=<optimized out>, addr=<optimized out>)
    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=<optimized out>, expected=<optimized out>, absSystemTime=<optimized out>, absSteadyTime=<optimized out>, 
    waitMask=<optimized out>)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/Futex.cpp:254
#3  0x0000000000ac0d5a 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=<optimized out>, deadline=..., expected=<optimized out>, futex=<optimized out>)
    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=<optimized out>, expected=<optimized out>, deadline=..., waitMask=<optimized out>)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/Futex-inl.h:123
#5  0x0000000000ac6dd7 in folly::SaturatingSemaphore<true, std::atomic>::tryWaitSlow<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x7f89197daef0, deadline=..., opt=...)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/MemoryIdler.h:194
#6  0x0000000000ac7306 in 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=0x7f8914001b40, deadline=...)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/SaturatingSemaphore.h:179
#7  0x0000000000acaa60 in folly::UnboundedBlockingQueue<folly::CPUThreadPoolExecutor::CPUTask>::try_take_for (this=0x7f8914001b00, time=...)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/LifoSem.h:498
#8  0x0000000000abeef7 in folly::CPUThreadPoolExecutor::threadRun (this=0x7f895454a000, thread=...)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/CPUThreadPoolExecutor.cpp:243
#9  0x0000000000ada249 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
#10 __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
#11 __call<void, 0, 1> (__args=<optimized out>, this=<optimized out>) at /usr/local/include/c++/7.3.0/functional:467
#12 operator()<> (this=<optimized out>) at /usr/local/include/c++/7.3.0/functional:551
#13 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
#14 0x00000000006955bd in operator() (this=0x7f89482eb280)
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/folly_executorpool.cc:48
#15 operator() (__closure=0x7f89482eb280) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/folly_executorpool.cc:48
#16 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
#17 0x00007f895643cd40 in execute_native_thread_routine () at /tmp/deploy/objdir/../gcc-10.2.0/libstdc++-v3/src/c++11/thread.cc:80
#18 0x00007f8955c40dd5 in start_thread () from /lib64/libpthread.so.0
#19 0x00007f8955969ead in clone () from /lib64/libc.so.6

Thread 24 (LWP 85584):
#0  0x00007f89559641c9 in syscall () from /lib64/libc.so.6
#1  0x0000000000ab9a9d in nativeFutexWaitImpl (waitMask=<optimized out>, absSteadyTime=<optimized out>, absSystemTime=<optimized out>, 
    expected=<optimized out>, addr=<optimized out>)
    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=<optimized out>, expected=<optimized out>, absSystemTime=<optimized out>, absSteadyTime=<optimized out>, 
    waitMask=<optimized out>)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/Futex.cpp:254
#3  0x0000000000ac0d5a 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=<optimized out>, deadline=..., expected=<optimized out>, futex=<optimized out>)
    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=<optimized out>, expected=<optimized out>, deadline=..., waitMask=<optimized out>)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/Futex-inl.h:123
#5  0x0000000000ac6c9d in folly::SaturatingSemaphore<true, std::atomic>::tryWaitSlow<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x7f89197db940, deadline=..., opt=...)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/MemoryIdler.h:164
#6  0x0000000000ac7306 in 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=0x7f8914000e40, deadline=...)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/SaturatingSemaphore.h:179
#7  0x0000000000acaa60 in folly::UnboundedBlockingQueue<folly::CPUThreadPoolExecutor::CPUTask>::try_take_for (this=0x7f8914000e00, time=...)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/LifoSem.h:498
#8  0x0000000000abeef7 in folly::CPUThreadPoolExecutor::threadRun (this=0x7f8954546400, thread=...)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/CPUThreadPoolExecutor.cpp:243
#9  0x0000000000ada249 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
#10 __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
#11 __call<void, 0, 1> (__args=<optimized out>, this=<optimized out>) at /usr/local/include/c++/7.3.0/functional:467
#12 operator()<> (this=<optimized out>) at /usr/local/include/c++/7.3.0/functional:551
#13 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
#14 0x00000000006955bd in operator() (this=0x7f89482eb180)
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/folly_executorpool.cc:48
#15 operator() (__closure=0x7f89482eb180) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/folly_executorpool.cc:48
#16 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
#17 0x00007f895643cd40 in execute_native_thread_routine () at /tmp/deploy/objdir/../gcc-10.2.0/libstdc++-v3/src/c++11/thread.cc:80
#18 0x00007f8955c40dd5 in start_thread () from /lib64/libpthread.so.0
#19 0x00007f8955969ead in clone () from /lib64/libc.so.6

Thread 23 (LWP 85583):
#0  0x00007f89559641c9 in syscall () from /lib64/libc.so.6
#1  0x0000000000ab9a9d in nativeFutexWaitImpl (waitMask=<optimized out>, absSteadyTime=<optimized out>, absSystemTime=<optimized out>, 
    expected=<optimized out>, addr=<optimized out>)
    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=<optimized out>, expected=<optimized out>, absSystemTime=<optimized out>, absSteadyTime=<optimized out>, 
    waitMask=<optimized out>)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/Futex.cpp:254
#3  0x0000000000ac0d5a 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=<optimized out>, deadline=..., expected=<optimized out>, futex=<optimized out>)
    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=<optimized out>, expected=<optimized out>, deadline=..., waitMask=<optimized out>)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/Futex-inl.h:123
#5  0x0000000000ac6dd7 in folly::SaturatingSemaphore<true, std::atomic>::tryWaitSlow<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x7f89197dc0a8, deadline=..., opt=...)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/MemoryIdler.h:194
#6  0x0000000000ac7306 in 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=0x7f8914000e40, deadline=...)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/SaturatingSemaphore.h:179
#7  0x0000000000acaa60 in folly::UnboundedBlockingQueue<folly::CPUThreadPoolExecutor::CPUTask>::try_take_for (this=0x7f8914000e00, time=...)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/LifoSem.h:498
#8  0x0000000000abeef7 in folly::CPUThreadPoolExecutor::threadRun (this=0x7f8954546400, thread=...)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/CPUThreadPoolExecutor.cpp:243
#9  0x0000000000ada249 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
#10 __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
#11 __call<void, 0, 1> (__args=<optimized out>, this=<optimized out>) at /usr/local/include/c++/7.3.0/functional:467
#12 operator()<> (this=<optimized out>) at /usr/local/include/c++/7.3.0/functional:551
#13 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
#14 0x00000000006955bd in operator() (this=0x7f89482eb100)
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/folly_executorpool.cc:48
#15 operator() (__closure=0x7f89482eb100) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/folly_executorpool.cc:48
#16 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
#17 0x00007f895643cd40 in execute_native_thread_routine () at /tmp/deploy/objdir/../gcc-10.2.0/libstdc++-v3/src/c++11/thread.cc:80
#18 0x00007f8955c40dd5 in start_thread () from /lib64/libpthread.so.0
#19 0x00007f8955969ead in clone () from /lib64/libc.so.6

Thread 22 (LWP 85582):
#0  0x00007f8955c44d12 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f8957760e51 in background_thread_sleep (tsdn=<optimized out>, interval=10000000000, 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=0x7f891b7ed000) at src/background_thread.c:497
#4  background_thread_entry (ind_arg=<optimized out>) at src/background_thread.c:522
#5  0x00007f8955c40dd5 in start_thread () from /lib64/libpthread.so.0
#6  0x00007f8955969ead in clone () from /lib64/libc.so.6

Thread 21 (LWP 85581):
#0  0x00007f89559641c9 in syscall () from /lib64/libc.so.6
#1  0x0000000000ab9a9d in nativeFutexWaitImpl (waitMask=<optimized out>, absSteadyTime=<optimized out>, absSystemTime=<optimized out>, 
    expected=<optimized out>, addr=<optimized out>)
    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=<optimized out>, expected=<optimized out>, absSystemTime=<optimized out>, absSteadyTime=<optimized out>, 
    waitMask=<optimized out>)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/Futex.cpp:254
#3  0x0000000000ac0d5a 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=<optimized out>, deadline=..., expected=<optimized out>, futex=<optimized out>)
    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=<optimized out>, expected=<optimized out>, deadline=..., waitMask=<optimized out>)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/Futex-inl.h:123
#5  0x0000000000ac6c9d in folly::SaturatingSemaphore<true, std::atomic>::tryWaitSlow<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x7f89197db2c8, deadline=..., opt=...)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/MemoryIdler.h:164
#6  0x0000000000ac7306 in 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=0x7f8914000e40, deadline=...)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/SaturatingSemaphore.h:179
#7  0x0000000000acaa60 in folly::UnboundedBlockingQueue<folly::CPUThreadPoolExecutor::CPUTask>::try_take_for (this=0x7f8914000e00, time=...)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/LifoSem.h:498
#8  0x0000000000abeef7 in folly::CPUThreadPoolExecutor::threadRun (this=0x7f8954546400, thread=...)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/CPUThreadPoolExecutor.cpp:243
#9  0x0000000000ada249 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
#10 __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
#11 __call<void, 0, 1> (__args=<optimized out>, this=<optimized out>) at /usr/local/include/c++/7.3.0/functional:467
#12 operator()<> (this=<optimized out>) at /usr/local/include/c++/7.3.0/functional:551
#13 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
#14 0x00000000006955bd in operator() (this=0x7f89482eb0c0)
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/folly_executorpool.cc:48
#15 operator() (__closure=0x7f89482eb0c0) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/folly_executorpool.cc:48
#16 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
#17 0x00007f895643cd40 in execute_native_thread_routine () at /tmp/deploy/objdir/../gcc-10.2.0/libstdc++-v3/src/c++11/thread.cc:80
#18 0x00007f8955c40dd5 in start_thread () from /lib64/libpthread.so.0
#19 0x00007f8955969ead in clone () from /lib64/libc.so.6

Thread 20 (LWP 85580):
#0  0x00007f89559641c9 in syscall () from /lib64/libc.so.6
#1  0x0000000000ab9a9d in nativeFutexWaitImpl (waitMask=<optimized out>, absSteadyTime=<optimized out>, absSystemTime=<optimized out>, 
    expected=<optimized out>, addr=<optimized out>)
    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=<optimized out>, expected=<optimized out>, absSystemTime=<optimized out>, absSteadyTime=<optimized out>, 
    waitMask=<optimized out>)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/Futex.cpp:254
#3  0x0000000000ac0d5a 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=<optimized out>, deadline=..., expected=<optimized out>, futex=<optimized out>)
    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=<optimized out>, expected=<optimized out>, deadline=..., waitMask=<optimized out>)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/Futex-inl.h:123
#5  0x0000000000ac6c9d in folly::SaturatingSemaphore<true, std::atomic>::tryWaitSlow<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x7f89197db550, deadline=..., opt=...)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/detail/MemoryIdler.h:164
#6  0x0000000000ac7306 in 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=0x7f8914000e40, deadline=...)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/SaturatingSemaphore.h:179
#7  0x0000000000acaa60 in folly::UnboundedBlockingQueue<folly::CPUThreadPoolExecutor::CPUTask>::try_take_for (this=0x7f8914000e00, time=...)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/LifoSem.h:498
#8  0x0000000000abeef7 in folly::CPUThreadPoolExecutor::threadRun (this=0x7f8954546400, thread=...)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/CPUThreadPoolExecutor.cpp:243
#9  0x0000000000ada249 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
#10 __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
#11 __call<void, 0, 1> (__args=<optimized out>, this=<optimized out>) at /usr/local/include/c++/7.3.0/functional:467
#12 operator()<> (this=<optimized out>) at /usr/local/include/c++/7.3.0/functional:551
#13 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
#14 0x00000000006955bd in operator() (this=0x7f89482eb080)
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/folly_executorpool.cc:48
#15 operator() (__closure=0x7f89482eb080) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/folly_executorpool.cc:48
#16 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
#17 0x00007f895643cd40 in execute_native_thread_routine () at /tmp/deploy/objdir/../gcc-10.2.0/libstdc++-v3/src/c++11/thread.cc:80
#18 0x00007f8955c40dd5 in start_thread () from /lib64/libpthread.so.0
#19 0x00007f8955969ead in clone () from /lib64/libc.so.6

Thread 19 (LWP 84706):
#0  0x00007f8955c44965 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f89564378bc in __gthread_cond_wait (__mutex=<optimized out>, __cond=__cond@entry=0x7f8954333698)
    at /tmp/deploy/objdir/x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu/bits/gthr-default.h:865
#2  std::condition_variable::wait (this=this@entry=0x7f8954333698, __lock=...)
    at /tmp/deploy/objdir/../gcc-10.2.0/libstdc++-v3/src/c++11/condition_variable.cc:53
#3  0x00000000005c9431 in Executor::run() () at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/executor.cc:38
#4  0x00007f895827d0d3 in Couchbase::Thread::thread_entry() () at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/thread.cc:45
#5  0x00007f895826cc19 in run (this=0x7f8954551f50) at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:58
#6  platform_thread_wrap(void*) () at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:71
#7  0x00007f8955c40dd5 in start_thread () from /lib64/libpthread.so.0
#8  0x00007f8955969ead in clone () from /lib64/libc.so.6

Thread 18 (LWP 84705):
#0  0x00007f8955c44965 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f89564378bc in __gthread_cond_wait (__mutex=<optimized out>, __cond=__cond@entry=0x7f89543334d8)
    at /tmp/deploy/objdir/x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu/bits/gthr-default.h:865
#2  std::condition_variable::wait (this=this@entry=0x7f89543334d8, __lock=...)
    at /tmp/deploy/objdir/../gcc-10.2.0/libstdc++-v3/src/c++11/condition_variable.cc:53
#3  0x00000000005c9431 in Executor::run() () at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/executor.cc:38
#4  0x00007f895827d0d3 in Couchbase::Thread::thread_entry() () at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/thread.cc:45
#5  0x00007f895826cc19 in run (this=0x7f8954551d70) at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:58
#6  platform_thread_wrap(void*) () at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:71
#7  0x00007f8955c40dd5 in start_thread () from /lib64/libpthread.so.0
#8  0x00007f8955969ead in clone () from /lib64/libc.so.6

Thread 17 (LWP 84704):
#0  0x00007f8955c44965 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f89564378bc in __gthread_cond_wait (__mutex=<optimized out>, __cond=__cond@entry=0x7f8954333318)
    at /tmp/deploy/objdir/x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu/bits/gthr-default.h:865
#2  std::condition_variable::wait (this=this@entry=0x7f8954333318, __lock=...)
    at /tmp/deploy/objdir/../gcc-10.2.0/libstdc++-v3/src/c++11/condition_variable.cc:53
#3  0x00000000005c9431 in Executor::run() () at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/executor.cc:38
#4  0x00007f895827d0d3 in Couchbase::Thread::thread_entry() () at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/thread.cc:45
#5  0x00007f895826cc19 in run (this=0x7f8954551d40) at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:58
#6  platform_thread_wrap(void*) () at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:71
#7  0x00007f8955c40dd5 in start_thread () from /lib64/libpthread.so.0
#8  0x00007f8955969ead in clone () from /lib64/libc.so.6

Thread 16 (LWP 84703):
#0  0x00007f8955c44965 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f89564378bc in __gthread_cond_wait (__mutex=<optimized out>, __cond=__cond@entry=0x7f8954333158)
    at /tmp/deploy/objdir/x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu/bits/gthr-default.h:865
#2  std::condition_variable::wait (this=this@entry=0x7f8954333158, __lock=...)
    at /tmp/deploy/objdir/../gcc-10.2.0/libstdc++-v3/src/c++11/condition_variable.cc:53
#3  0x00000000005c9431 in Executor::run() () at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/executor.cc:38
#4  0x00007f895827d0d3 in Couchbase::Thread::thread_entry() () at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/thread.cc:45
#5  0x00007f895826cc19 in run (this=0x7f8954551f80) at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:58
#6  platform_thread_wrap(void*) () at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:71
#7  0x00007f8955c40dd5 in start_thread () from /lib64/libpthread.so.0
#8  0x00007f8955969ead in clone () from /lib64/libc.so.6

Thread 15 (LWP 84702):
#0  0x00007f895596a483 in epoll_wait () from /lib64/libc.so.6
#1  0x00007f89575283c5 in epoll_dispatch (base=0x7f89544acc00, tv=<optimized out>)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/epoll.c:465
#2  0x00007f895751f376 in event_base_loop (base=0x7f89544acc00, flags=flags@entry=0)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/event.c:1998
#3  0x0000000000585e4b in worker_libevent (arg=0x7f89544f5ff8)
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/thread.cc:202
#4  0x00007f895826cc19 in run (this=0x7f8954551da0) at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:58
#5  platform_thread_wrap(void*) () at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:71
#6  0x00007f8955c40dd5 in start_thread () from /lib64/libpthread.so.0
#7  0x00007f8955969ead in clone () from /lib64/libc.so.6

Thread 14 (LWP 84701):
#0  0x00007f895596a483 in epoll_wait () from /lib64/libc.so.6
#1  0x00007f89575283c5 in epoll_dispatch (base=0x7f89544ac900, tv=<optimized out>)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/epoll.c:465
#2  0x00007f895751f376 in event_base_loop (base=0x7f89544ac900, flags=flags@entry=0)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/event.c:1998
#3  0x0000000000585e4b in worker_libevent (arg=0x7f89544f5550)
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/thread.cc:202
#4  0x00007f895826cc19 in run (this=0x7f8954551f20) at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:58
#5  platform_thread_wrap(void*) () at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:71
#6  0x00007f8955c40dd5 in start_thread () from /lib64/libpthread.so.0
#7  0x00007f8955969ead in clone () from /lib64/libc.so.6

Thread 13 (LWP 84700):
#0  0x00007f895596a483 in epoll_wait () from /lib64/libc.so.6
#1  0x00007f89575283c5 in epoll_dispatch (base=0x7f89544ac600, tv=<optimized out>)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/epoll.c:465
#2  0x00007f895751f376 in event_base_loop (base=0x7f89544ac600, flags=flags@entry=0)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/event.c:1998
#3  0x0000000000585e4b in worker_libevent (arg=0x7f89544f4aa8)
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/thread.cc:202
#4  0x00007f895826cc19 in run (this=0x7f8954551e00) at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:58
#5  platform_thread_wrap(void*) () at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:71
#6  0x00007f8955c40dd5 in start_thread () from /lib64/libpthread.so.0
#7  0x00007f8955969ead in clone () from /lib64/libc.so.6

Thread 12 (LWP 84699):
#0  0x00007f895596a483 in epoll_wait () from /lib64/libc.so.6
#1  0x00007f89575283c5 in epoll_dispatch (base=0x7f89544ac300, tv=<optimized out>)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/epoll.c:465
#2  0x00007f895751f376 in event_base_loop (base=0x7f89544ac300, flags=flags@entry=0)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/event.c:1998
#3  0x0000000000585e4b in worker_libevent (arg=0x7f89544f4000)
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/thread.cc:202
#4  0x00007f895826cc19 in run (this=0x7f8954551c20) at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:58
#5  platform_thread_wrap(void*) () at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:71
#6  0x00007f8955c40dd5 in start_thread () from /lib64/libpthread.so.0
#7  0x00007f8955969ead in clone () from /lib64/libc.so.6

Thread 11 (LWP 84698):
#0  0x00007f8955c44d12 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x0000000000624c57 in AuditImpl::consume_events() () at /opt/gcc-10.2.0/include/c++/10.2.0/x86_64-pc-linux-gnu/bits/gthr-default.h:872
#2  0x00007f895826cc19 in run (this=0x7f8954464810) at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:58
#3  platform_thread_wrap(void*) () at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:71
#4  0x00007f8955c40dd5 in start_thread () from /lib64/libpthread.so.0
#5  0x00007f8955969ead in clone () from /lib64/libc.so.6

Thread 10 (LWP 84697):
#0  0x00007f8955c44d12 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00000000005b6506 in ExternalAuthManagerThread::run() () at /opt/gcc-10.2.0/include/c++/10.2.0/x86_64-pc-linux-gnu/bits/gthr-default.h:872
#2  0x00007f895827d0d3 in Couchbase::Thread::thread_entry() () at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/thread.cc:45
#3  0x00007f895826cc19 in run (this=0x7f8954464ab0) at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:58
#4  platform_thread_wrap(void*) () at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:71
#5  0x00007f8955c40dd5 in start_thread () from /lib64/libpthread.so.0
#6  0x00007f8955969ead in clone () from /lib64/libc.so.6

Thread 9 (LWP 84696):
#0  0x00007f895595f20d in poll () from /lib64/libc.so.6
#1  0x00000000008bfba8 in master_thread (thread_func_param=<optimized out>)
    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  0x00007f8955c40dd5 in start_thread () from /lib64/libpthread.so.0
#3  0x00007f8955969ead in clone () from /lib64/libc.so.6

Thread 8 (LWP 84695):
#0  0x00007f8955c44965 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00000000008c8c3b in worker_thread (thread_func_param=<optimized out>)
    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  0x00007f8955c40dd5 in start_thread () from /lib64/libpthread.so.0
#3  0x00007f8955969ead in clone () from /lib64/libc.so.6

Thread 7 (LWP 84694):
#0  0x00007f8955c44965 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00000000008c8c3b in worker_thread (thread_func_param=<optimized out>)
    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  0x00007f8955c40dd5 in start_thread () from /lib64/libpthread.so.0
#3  0x00007f8955969ead in clone () from /lib64/libc.so.6

Thread 6 (LWP 84693):
#0  0x00007f895595f20d in poll () from /lib64/libc.so.6
#1  0x00000000005858c1 in get_command (buffsize=80, buffer=0x7f895306a790 "@v#X\211\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  0x00007f895826cc19 in run (this=0x7f8954464360) at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:58
#4  platform_thread_wrap(void*) () at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:71
#5  0x00007f8955c40dd5 in start_thread () from /lib64/libpthread.so.0
#6  0x00007f8955969ead in clone () from /lib64/libc.so.6

Thread 5 (LWP 84692):
#0  0x00007f8955c44d12 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x0000000000a82cab in __gthread_cond_timedwait (__abs_timeout=0x7f895386b7b0, __mutex=<optimized out>, __cond=<optimized out>)
    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=<optimized out>) 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=<optimized out>) at /opt/gcc-10.2.0/include/c++/10.2.0/condition_variable:141
#4  wait_until<std::chrono::_V2::steady_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=<optimized out>)
    at /opt/gcc-10.2.0/include/c++/10.2.0/condition_variable:158
#5  wait_for<long int, std::ratio<1>, spdlog::details::periodic_worker::periodic_worker(const std::function<void()>&, std::chrono::seconds)::<lambda()>::<lambda()> > (__rtime=..., __rtime=..., __p=..., __lock=..., this=<optimized out>) at /opt/gcc-10.2.0/include/c++/10.2.0/condition_variable:185
#6  operator() (__closure=0x7f8954468748)
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/third_party/spdlog/include/spdlog/details/periodic_worker.h:38
#7  __invoke_impl<void, spdlog::details::periodic_worker::periodic_worker(const std::function<void()>&, std::chrono::seconds)::<lambda()> > (
    __f=<unknown type in /usr/lib/debug/opt/couchbase/bin/memcached.debug, CU 0x7f01839, DIE 0x7f31038>)
    at /opt/gcc-10.2.0/include/c++/10.2.0/bits/invoke.h:60
#8  __invoke<spdlog::details::periodic_worker::periodic_worker(const std::function<void()>&, std::chrono::seconds)::<lambda()> > (
    __fn=<unknown type in /usr/lib/debug/opt/couchbase/bin/memcached.debug, CU 0x7f01839, DIE 0x7f31018>)
    at /opt/gcc-10.2.0/include/c++/10.2.0/bits/invoke.h:95
#9  _M_invoke<0> (this=0x7f8954468748) at /opt/gcc-10.2.0/include/c++/10.2.0/thread:264
#10 operator() (this=0x7f8954468748) at /opt/gcc-10.2.0/include/c++/10.2.0/thread:271
#11 _ZNSt6thread11_State_implINS_8_InvokerISt5tupleIJZN6spdlog7details15periodic_workerC4ERKSt8functionIFvvEENSt6chrono8durationIlSt5ratioILl1ELl1EEEEEUlvE_EEEEE6_M_runEv (this=0x7f8954468740) at /opt/gcc-10.2.0/include/c++/10.2.0/thread:215
#12 0x00007f895643cd40 in execute_native_thread_routine () at /tmp/deploy/objdir/../gcc-10.2.0/libstdc++-v3/src/c++11/thread.cc:80
#13 0x00007f8955c40dd5 in start_thread () from /lib64/libpthread.so.0
#14 0x00007f8955969ead in clone () from /lib64/libc.so.6

Thread 4 (LWP 84691):
#0  0x00007f8955c44d12 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x0000000000a834f5 in __gthread_cond_timedwait (__abs_timeout=0x7f895406c560, __mutex=<optimized out>, __cond=0x7f8955212638)
    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=0x7f8955212638) 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=0x7f8955212638)
    at /opt/gcc-10.2.0/include/c++/10.2.0/condition_variable:141
#4  wait_until<std::chrono::_V2::steady_clock, std::chrono::duration<long int, std::ratio<1, 1000000000> >, spdlog::details::mpmc_blocking_queue<T>::dequeue_for<spdlog::details::async_msg>::<lambda()> > (__p=..., __atime=..., __lock=..., this=0x7f8955212638)
    at /opt/gcc-10.2.0/include/c++/10.2.0/condition_variable:158
#5  wait_for<long int, std::ratio<1, 1000>, spdlog::details::mpmc_blocking_queue<T>::dequeue_for<spdlog::details::async_msg>::<lambda()> > (
    __rtime=<synthetic pointer>, __rtime=<synthetic pointer>, __p=..., __lock=..., this=0x7f8955212638)
    at /opt/gcc-10.2.0/include/c++/10.2.0/condition_variable:185
#6  dequeue_for (wait_duration=..., popped_item=..., this=0x7f8955212610)
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/third_party/spdlog/include/spdlog/details/mpmc_blocking_q.h:61
#7  spdlog::details::thread_pool::process_next_msg_ (this=this@entry=0x7f8955212610)
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/third_party/spdlog/include/spdlog/details/thread_pool.h:193
#8  0x0000000000a83b10 in spdlog::details::thread_pool::worker_loop_ (this=0x7f8955212610)
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/third_party/spdlog/include/spdlog/details/thread_pool.h:184
#9  0x00007f895643cd40 in execute_native_thread_routine () at /tmp/deploy/objdir/../gcc-10.2.0/libstdc++-v3/src/c++11/thread.cc:80
#10 0x00007f8955c40dd5 in start_thread () from /lib64/libpthread.so.0
#11 0x00007f8955969ead in clone () from /lib64/libc.so.6

Thread 3 (LWP 84690):
#0  0x00007f8955c44d12 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f89577615a7 in background_thread_sleep (tsdn=<optimized out>, interval=1925000000, 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=0x7f8954dee000) at src/background_thread.c:452
#4  background_work (ind=<optimized out>, tsd=0x7f8954dee000) at src/background_thread.c:490
#5  background_thread_entry (ind_arg=<optimized out>) at src/background_thread.c:522
#6  0x00007f8955c40dd5 in start_thread () from /lib64/libpthread.so.0
#7  0x00007f8955969ead in clone () from /lib64/libc.so.6

Thread 2 (LWP 84689):
#0  0x00007f895596a483 in epoll_wait () from /lib64/libc.so.6
#1  0x00007f89575283c5 in epoll_dispatch (base=0x7f89544ac000, tv=<optimized out>)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/epoll.c:465
#2  0x00007f895751f376 in event_base_loop (base=0x7f89544ac000, flags=0)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/event.c:1998
#3  0x00000000005363a6 in memcached_main(int, char**) () at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/memcached.cc:1525
#4  0x00007f895588e3d5 in __libc_start_main () from /lib64/libc.so.6
#5  0x000000000052c67b in _start () at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/include/platform/compression/allocator.h:75

Thread 1 (LWP 85591):
#0  0x00000000008efce0 in pread_bin_internal (max_header_size=0, ret_ptr=0x7f88fe7e9ba8, pos=<optimized out>, file=0x7f88d588ec60)
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/couchstore/src/couch_file_read.cc:185
#1  pread_bin (file=file@entry=0x7f88d588ec60, pos=<optimized out>, ret_ptr=ret_ptr@entry=0x7f88fe7e9ba8)
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/couchstore/src/couch_file_read.cc:239
#2  0x00000000008e8669 in bp_to_doc (options=<optimized out>, bp=<optimized out>, db=0x7f88d588ec60, pDoc=0x7f88fe7e9c60)
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/couchstore/src/couch_db.cc:850
#3  couchstore_open_doc_with_docinfo () at /home/couchbase/jenkins/workspace/couchbase-server-unix/couchstore/src/couch_db.cc:996
#4  0x000000000082ef9f in bySeqnoScanCallback(Db*, DocInfo*, void*) ()
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/couch-kvstore/couch-kvstore.cc:2740
#5  0x00000000008e7519 in lookup_callback (rq=<optimized out>, k=0x7f88fe7e9df0, v=0x7f88fe7e9e00)
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/couchstore/src/couch_db.cc:1095
#6  0x00000000008fc349 in btree_lookup_inner(couchfile_lookup_request*, unsigned long, int, int) ()
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/couchstore/src/btree_read.cc:122
#7  0x00000000008fc04e in btree_lookup_inner(couchfile_lookup_request*, unsigned long, int, int) ()
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/couchstore/src/btree_read.cc:75
#8  0x00000000008fc4b1 in btree_lookup (rq=rq@entry=0x7f88fe7e9f90, root_pointer=<optimized out>)
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/couchstore/src/btree_read.cc:162
#9  0x00000000008e9726 in couchstore_changes_since () at /home/couchbase/jenkins/workspace/couchbase-server-unix/couchstore/src/couch_db.cc:1148
#10 0x000000000082d8c1 in CouchKVStore::scan(BySeqnoScanContext&) ()
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/couch-kvstore/couch-kvstore-db-holder.h:50
#11 0x000000000088a933 in DCPBackfillBySeqnoDisk::scan() ()
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/dcp/backfill_by_seqno_disk.cc:180
#12 0x000000000088d54a in DCPBackfillDisk::run() ()
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/dcp/backfill_disk.cc:134
#13 0x000000000088f891 in BackfillManager::backfill() ()
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/dcp/backfill-manager.cc:332
#14 0x000000000088fb04 in BackfillManagerTask::run() ()
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/dcp/backfill-manager.cc:70
#15 0x000000000069bee7 in GlobalTask::execute() () at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/globaltask.cc:68
#16 0x0000000000697030 in FollyExecutorPool::TaskProxy::scheduleViaCPUPool()::{lambda()#1}::operator()() const (__closure=0x7f88fe7ea630)
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/folly_executorpool.cc:190
#17 0x0000000000697030 in FollyExecutorPool::TaskProxy::timeoutExpired (this=<optimized out>)
#18 0x0000000000ad7290 in operator() (this=0x7f88fe7ea630)
    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=0x7f895454b800, thread=..., task=<unknown type in /usr/lib/debug/opt/couchbase/bin/memcached.debug, CU 0x82da4ea, DIE 0x8320944>)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/ThreadPoolExecutor.cpp:97
#20 0x0000000000abef6a in folly::CPUThreadPoolExecutor::threadRun (this=0x7f895454b800, thread=...)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/CPUThreadPoolExecutor.cpp:265
#21 0x0000000000ada249 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 0x00000000006955bd in operator() (this=0x7f89482eb440)
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/folly_executorpool.cc:48
#27 operator() (__closure=0x7f89482eb440) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/folly_executorpool.cc:48
#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 0x00007f895643cd40 in execute_native_thread_routine () at /tmp/deploy/objdir/../gcc-10.2.0/libstdc++-v3/src/c++11/thread.cc:80
#30 0x00007f8955c40dd5 in start_thread () from /lib64/libpthread.so.0
#31 0x00007f8955969ead in clone () from /lib64/libc.so.6
No core file now.