(gdb) thread apply all bt

Thread 31 (Thread 0x7fefd5ef0440 (LWP 67462)):
#0  0x00007fefd11364ed in __lll_lock_wait () from /lib64/libpthread.so.0
#1  0x00007fefd1131dcb in _L_lock_883 () from /lib64/libpthread.so.0
#2  0x00007fefd1131c98 in pthread_mutex_lock () from /lib64/libpthread.so.0
#3  0x000000000041d417 in __gthread_mutex_lock (__mutex=0x8784c0 <buckets_lock>) at /usr/local/include/c++/7.3.0/x86_64-pc-linux-gnu/bits/gthr-default.h:748
#4  lock (this=0x8784c0 <buckets_lock>) at /usr/local/include/c++/7.3.0/bits/std_mutex.h:103
#5  lock_guard (__m=..., this=<synthetic pointer>) at /usr/local/include/c++/7.3.0/bits/std_mutex.h:162
#6  bucketsForEach(std::function<bool (Bucket&, void*)>, void*) (fn=..., arg=arg@entry=0x0) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/memcached.cc:96
#7  0x00000000004a519e in mc_gather_timing_samples () at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/mc_time.cc:259
#8  mc_time_clock_tick () at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/mc_time.cc:214
#9  0x00000000004a5385 in mc_time_clock_event_handler (fd=<optimized out>, which=<optimized out>, arg=<optimized out>) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/mc_time.cc:198
#10 0x00007fefd29c1f58 in event_process_active_single_queue (base=base@entry=0x7fefcf8b2000, max_to_process=max_to_process@entry=2147483647, endtime=endtime@entry=0x0, activeq=<optimized out>) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/event.c:1697
#11 0x00007fefd29c254f in event_process_active (base=0x7fefcf8b2000) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/event.c:1789
#12 event_base_loop (base=0x7fefcf8b2000, flags=flags@entry=0) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/event.c:2012
#13 0x0000000000423674 in memcached_main (argc=<optimized out>, argv=<optimized out>) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/memcached.cc:1547
#14 0x00007fefd0d7d3d5 in __libc_start_main () from /lib64/libc.so.6
#15 0x000000000041c6ce in _start ()

Thread 30 (Thread 0x7fef637fe700 (LWP 67668)):
#0  0x00007fefd0e59483 in epoll_wait () from /lib64/libc.so.6
#1  0x00007fefd29cb3c5 in epoll_dispatch (base=0x7fefc469c000, tv=<optimized out>) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/epoll.c:465
#2  0x00007fefd29c2376 in event_base_loop (base=0x7fefc469c000, flags=1) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/event.c:1998
#3  0x00007fefd52a04d7 in folly::EventBase::loopBody (this=this@entry=0x7fefc45fc780, 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  0x00007fefd52a09a6 in folly::EventBase::loop (this=this@entry=0x7fefc45fc780) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/io/async/EventBase.cpp:315
#5  0x00007fefd52a2366 in folly::EventBase::loopForever (this=0x7fefc45fc780) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/io/async/EventBase.cpp:538
#6  0x00007fefd528f989 in folly::IOThreadPoolExecutor::threadRun (this=0x7fefc4576780, thread=...) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/IOThreadPoolExecutor.cpp:195
#7  0x00007fefd529b119 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 0x00007fefd1916dcf in std::execute_native_thread_routine (__p=0x7fefcf774410) at /tmp/deploy/gcc-7.3.0/libstdc++-v3/src/c++11/thread.cc:83
#13 0x00007fefd112fdd5 in start_thread () from /lib64/libpthread.so.0
#14 0x00007fefd0e58ead in clone () from /lib64/libc.so.6

Thread 29 (Thread 0x7fef63fff700 (LWP 67667)):
#0  0x00007fefd0e531c9 in syscall () from /lib64/libc.so.6
#1  0x00007fefd527b04d 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  0x00007fefd528225a 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=0x7fef63fe598c)
    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=0x7fef63fe598c, 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  0x00007fefd529bd3f 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=0x7fef63fe598c, 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  0x00007fefd529f60f in wait (opt=..., this=0x7fef63fe598c) 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=0x7fefc45fc780, 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 0x00007fefd51187ac in FollyExecutorPool::schedule (this=<optimized out>, task=...) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/folly_executorpool.cc:937
#11 0x00007fefd514680e in KVBucket::visitAsync (this=this@entry=0x7fefc431b000, visitor=..., lbl=lbl@entry=0x7fefd52e0599 "DurabilityTimeoutVisitor", id=id@entry=DurabilityTimeoutVisitor, maxExpectedDuration=maxExpectedDuration@entry=...) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/kv_bucket.cc:2276
#12 0x00007fefd50bf081 in DurabilityTimeoutTask::run (this=0x7fefc42c8870) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/durability_timeout_task.cc:61
#13 0x00007fefd51230c3 in GlobalTask::execute (this=0x7fefc42c8870) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/globaltask.cc:74
#14 0x00007fefd511d3bf in operator() (__closure=0x7fef63fe6000) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/folly_executorpool.cc:196
#15 folly::detail::function::FunctionTraits<void ()>::callSmall<FollyExecutorPool::TaskProxy::scheduleViaCPUPool()::{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:387
#16 0x00007fefd5298160 in operator() (this=0x7fef63fe6000) 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=0x7fefc4601c00, thread=..., task=<unknown type in /usr/lib/debug/opt/couchbase/lib/libep.so.debug, CU 0x356507a, DIE 0x35ab511>)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/ThreadPoolExecutor.cpp:97
#18 0x00007fefd528063a in folly::CPUThreadPoolExecutor::threadRun (this=0x7fefc4601c00, thread=...) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/CPUThreadPoolExecutor.cpp:265
#19 0x00007fefd529b119 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 0x00007fefd511b928 in operator() (this=0x7fefc44c7e80) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/Function.h:416
#25 operator() (__closure=0x7fefc44c7e80) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/folly_executorpool.cc:54
#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 0x00007fefd511b803 in operator() (this=0x7fefcf9d1110) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/Function.h:416
#28 operator() (__closure=0x7fefcf9d1100) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/executors/thread_factory/PriorityThreadFactory.h:54
#29 folly::detail::function::FunctionTraits<void ()>::callBig<folly::PriorityThreadFactory::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
#30 0x00007fefd1916dcf in std::execute_native_thread_routine (__p=0x7fefcf7743a0) at /tmp/deploy/gcc-7.3.0/libstdc++-v3/src/c++11/thread.cc:83
#31 0x00007fefd112fdd5 in start_thread () from /lib64/libpthread.so.0
#32 0x00007fefd0e58ead in clone () from /lib64/libc.so.6

Thread 28 (Thread 0x7fef80ff9700 (LWP 67666)):
#0  0x00007fefd0e531c9 in syscall () from /lib64/libc.so.6
#1  0x00007fefd527b04d 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  0x00007fefd528225a 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  0x00007fefd5287ca7 in folly::SaturatingSemaphore<true, std::atomic>::tryWaitSlow<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x7fef947d7300, 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  0x00007fefd52881d6 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=0x7fef90002d40, deadline=...)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/SaturatingSemaphore.h:179
#7  0x00007fefd528b930 in folly::UnboundedBlockingQueue<folly::CPUThreadPoolExecutor::CPUTask>::try_take_for (this=0x7fef90002d00, time=...) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/LifoSem.h:498
#8  0x00007fefd52805c7 in folly::CPUThreadPoolExecutor::threadRun (this=0x7fefc4601c00, thread=...) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/CPUThreadPoolExecutor.cpp:243
#9  0x00007fefd529b119 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 0x00007fefd511b928 in operator() (this=0x7fefc44c7e40) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/Function.h:416
#15 operator() (__closure=0x7fefc44c7e40) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/folly_executorpool.cc:54
#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 0x00007fefd511b803 in operator() (this=0x7fefcf9d10c0) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/Function.h:416
#18 operator() (__closure=0x7fefcf9d10b0) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/executors/thread_factory/PriorityThreadFactory.h:54
#19 folly::detail::function::FunctionTraits<void ()>::callBig<folly::PriorityThreadFactory::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 0x00007fefd1916dcf in std::execute_native_thread_routine (__p=0x7fefcf774330) at /tmp/deploy/gcc-7.3.0/libstdc++-v3/src/c++11/thread.cc:83
#21 0x00007fefd112fdd5 in start_thread () from /lib64/libpthread.so.0
#22 0x00007fefd0e58ead in clone () from /lib64/libc.so.6

Thread 27 (Thread 0x7fef817fa700 (LWP 67665)):
#0  0x00007fefd0e531c9 in syscall () from /lib64/libc.so.6
#1  0x00007fefd527b04d 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  0x00007fefd528225a 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  0x00007fefd5287b6d in folly::SaturatingSemaphore<true, std::atomic>::tryWaitSlow<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x7fef947d70d8, 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  0x00007fefd52881d6 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=0x7fef900027c0, deadline=...)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/SaturatingSemaphore.h:179
#7  0x00007fefd528b930 in folly::UnboundedBlockingQueue<folly::CPUThreadPoolExecutor::CPUTask>::try_take_for (this=0x7fef90002780, time=...) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/LifoSem.h:498
#8  0x00007fefd52805c7 in folly::CPUThreadPoolExecutor::threadRun (this=0x7fefc4601000, thread=...) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/CPUThreadPoolExecutor.cpp:243
#9  0x00007fefd529b119 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 0x00007fefd511b928 in operator() (this=0x7fefc44c7d40) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/Function.h:416
#15 operator() (__closure=0x7fefc44c7d40) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/folly_executorpool.cc:54
#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 0x00007fefd511b803 in operator() (this=0x7fefcf9d0fd0) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/Function.h:416
#18 operator() (__closure=0x7fefcf9d0fc0) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/executors/thread_factory/PriorityThreadFactory.h:54
#19 folly::detail::function::FunctionTraits<void ()>::callBig<folly::PriorityThreadFactory::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 0x00007fefd1916dcf in std::execute_native_thread_routine (__p=0x7fefcf7742c0) at /tmp/deploy/gcc-7.3.0/libstdc++-v3/src/c++11/thread.cc:83
#21 0x00007fefd112fdd5 in start_thread () from /lib64/libpthread.so.0
#22 0x00007fefd0e58ead in clone () from /lib64/libc.so.6

Thread 26 (Thread 0x7fef81ffb700 (LWP 67664)):
#0  0x00007fefd0e531c9 in syscall () from /lib64/libc.so.6
#1  0x00007fefd527b04d 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  0x00007fefd528225a 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  0x00007fefd5287b6d in folly::SaturatingSemaphore<true, std::atomic>::tryWaitSlow<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x7fef947d72e8, 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  0x00007fefd52881d6 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=0x7fef900018c0, deadline=...)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/SaturatingSemaphore.h:179
#7  0x00007fefd528b930 in folly::UnboundedBlockingQueue<folly::CPUThreadPoolExecutor::CPUTask>::try_take_for (this=0x7fef90001880, time=...) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/LifoSem.h:498
#8  0x00007fefd52805c7 in folly::CPUThreadPoolExecutor::threadRun (this=0x7fefc453d400, thread=...) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/CPUThreadPoolExecutor.cpp:243
#9  0x00007fefd529b119 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 0x00007fefd511b928 in operator() (this=0x7fefc44c7c80) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/Function.h:416
#15 operator() (__closure=0x7fefc44c7c80) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/folly_executorpool.cc:54
#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 0x00007fefd511b803 in operator() (this=0x7fefcf9d0f30) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/Function.h:416
#18 operator() (__closure=0x7fefcf9d0f20) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/executors/thread_factory/PriorityThreadFactory.h:54
#19 folly::detail::function::FunctionTraits<void ()>::callBig<folly::PriorityThreadFactory::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 0x00007fefd1916dcf in std::execute_native_thread_routine (__p=0x7fefcf774250) at /tmp/deploy/gcc-7.3.0/libstdc++-v3/src/c++11/thread.cc:83
#21 0x00007fefd112fdd5 in start_thread () from /lib64/libpthread.so.0
#22 0x00007fefd0e58ead in clone () from /lib64/libc.so.6

Thread 25 (Thread 0x7fef827fc700 (LWP 67662)):
#0  0x00007fefd0e531c9 in syscall () from /lib64/libc.so.6
#1  0x00007fefd527b04d 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  0x00007fefd528225a 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  0x00007fefd5287b6d in folly::SaturatingSemaphore<true, std::atomic>::tryWaitSlow<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x7fef947d73a8, 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  0x00007fefd52881d6 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=0x7fef900018c0, deadline=...)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/SaturatingSemaphore.h:179
#7  0x00007fefd528b930 in folly::UnboundedBlockingQueue<folly::CPUThreadPoolExecutor::CPUTask>::try_take_for (this=0x7fef90001880, time=...) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/LifoSem.h:498
#8  0x00007fefd52805c7 in folly::CPUThreadPoolExecutor::threadRun (this=0x7fefc453d400, thread=...) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/CPUThreadPoolExecutor.cpp:243
#9  0x00007fefd529b119 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 0x00007fefd511b928 in operator() (this=0x7fefc44c7c00) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/Function.h:416
#15 operator() (__closure=0x7fefc44c7c00) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/folly_executorpool.cc:54
#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 0x00007fefd511b803 in operator() (this=0x7fefcf9d0ee0) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/Function.h:416
#18 operator() (__closure=0x7fefcf9d0ed0) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/executors/thread_factory/PriorityThreadFactory.h:54
#19 folly::detail::function::FunctionTraits<void ()>::callBig<folly::PriorityThreadFactory::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 0x00007fefd1916dcf in std::execute_native_thread_routine (__p=0x7fefcf7741e0) at /tmp/deploy/gcc-7.3.0/libstdc++-v3/src/c++11/thread.cc:83
#21 0x00007fefd112fdd5 in start_thread () from /lib64/libpthread.so.0
#22 0x00007fefd0e58ead in clone () from /lib64/libc.so.6

Thread 24 (Thread 0x7fef82ffd700 (LWP 67661)):
#0  0x00007fefd0e531c9 in syscall () from /lib64/libc.so.6
#1  0x00007fefd527b04d 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  0x00007fefd528225a 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  0x00007fefd5287b6d in folly::SaturatingSemaphore<true, std::atomic>::tryWaitSlow<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x7fef947d70a8, 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  0x00007fefd52881d6 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=0x7fef900018c0, deadline=...)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/SaturatingSemaphore.h:179
#7  0x00007fefd528b930 in folly::UnboundedBlockingQueue<folly::CPUThreadPoolExecutor::CPUTask>::try_take_for (this=0x7fef90001880, time=...) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/LifoSem.h:498
#8  0x00007fefd52805c7 in folly::CPUThreadPoolExecutor::threadRun (this=0x7fefc453d400, thread=...) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/CPUThreadPoolExecutor.cpp:243
#9  0x00007fefd529b119 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 0x00007fefd511b928 in operator() (this=0x7fefc44c7bc0) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/Function.h:416
#15 operator() (__closure=0x7fefc44c7bc0) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/folly_executorpool.cc:54
#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 0x00007fefd511b803 in operator() (this=0x7fefcf9d0e90) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/Function.h:416
#18 operator() (__closure=0x7fefcf9d0e80) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/executors/thread_factory/PriorityThreadFactory.h:54
#19 folly::detail::function::FunctionTraits<void ()>::callBig<folly::PriorityThreadFactory::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 0x00007fefd1916dcf in std::execute_native_thread_routine (__p=0x7fefcf774170) at /tmp/deploy/gcc-7.3.0/libstdc++-v3/src/c++11/thread.cc:83
#21 0x00007fefd112fdd5 in start_thread () from /lib64/libpthread.so.0
#22 0x00007fefd0e58ead in clone () from /lib64/libc.so.6

Thread 23 (Thread 0x7fef837fe700 (LWP 67660)):
#0  0x00007fefd0e531c9 in syscall () from /lib64/libc.so.6
#1  0x00007fefd527b04d 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  0x00007fefd528225a 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  0x00007fefd5287b6d in folly::SaturatingSemaphore<true, std::atomic>::tryWaitSlow<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x7fef947d7390, 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  0x00007fefd52881d6 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=0x7fef900018c0, deadline=...)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/SaturatingSemaphore.h:179
#7  0x00007fefd528b930 in folly::UnboundedBlockingQueue<folly::CPUThreadPoolExecutor::CPUTask>::try_take_for (this=0x7fef90001880, time=...) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/LifoSem.h:498
#8  0x00007fefd52805c7 in folly::CPUThreadPoolExecutor::threadRun (this=0x7fefc453d400, thread=...) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/CPUThreadPoolExecutor.cpp:243
#9  0x00007fefd529b119 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 0x00007fefd511b928 in operator() (this=0x7fefc44c7b80) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/Function.h:416
#15 operator() (__closure=0x7fefc44c7b80) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/folly_executorpool.cc:54
#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 0x00007fefd511b803 in operator() (this=0x7fefcf9d0e40) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/Function.h:416
#18 operator() (__closure=0x7fefcf9d0e30) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/executors/thread_factory/PriorityThreadFactory.h:54
#19 folly::detail::function::FunctionTraits<void ()>::callBig<folly::PriorityThreadFactory::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 0x00007fefd1916dcf in std::execute_native_thread_routine (__p=0x7fefcf774100) at /tmp/deploy/gcc-7.3.0/libstdc++-v3/src/c++11/thread.cc:83
#21 0x00007fefd112fdd5 in start_thread () from /lib64/libpthread.so.0
#22 0x00007fefd0e58ead in clone () from /lib64/libc.so.6

Thread 22 (Thread 0x7fef83fff700 (LWP 67659)):
#0  0x00007fefd0e531c9 in syscall () from /lib64/libc.so.6
#1  0x00007fefd527b04d 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  0x00007fefd528225a 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  0x00007fefd5287b6d in folly::SaturatingSemaphore<true, std::atomic>::tryWaitSlow<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x7fef947d7120, 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  0x00007fefd52881d6 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=0x7fef90000a40, deadline=...)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/SaturatingSemaphore.h:179
#7  0x00007fefd528b930 in folly::UnboundedBlockingQueue<folly::CPUThreadPoolExecutor::CPUTask>::try_take_for (this=0x7fef90000a00, time=...) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/LifoSem.h:498
#8  0x00007fefd52805c7 in folly::CPUThreadPoolExecutor::threadRun (this=0x7fefc453c800, thread=...) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/CPUThreadPoolExecutor.cpp:243
#9  0x00007fefd529b119 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 0x00007fefd511b928 in operator() (this=0x7fefc44c7a80) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/Function.h:416
#15 operator() (__closure=0x7fefc44c7a80) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/folly_executorpool.cc:54
#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 0x00007fefd511b803 in operator() (this=0x7fefcf9d0620) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/Function.h:416
#18 operator() (__closure=0x7fefcf9d0610) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/executors/thread_factory/PriorityThreadFactory.h:54
#19 folly::detail::function::FunctionTraits<void ()>::callBig<folly::PriorityThreadFactory::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 0x00007fefd1916dcf in std::execute_native_thread_routine (__p=0x7fefcf774090) at /tmp/deploy/gcc-7.3.0/libstdc++-v3/src/c++11/thread.cc:83
#21 0x00007fefd112fdd5 in start_thread () from /lib64/libpthread.so.0
#22 0x00007fefd0e58ead in clone () from /lib64/libc.so.6

Thread 21 (Thread 0x7fef967fc700 (LWP 67658)):
#0  0x00007fefd0e531c9 in syscall () from /lib64/libc.so.6
#1  0x00007fefd527b04d 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  0x00007fefd528225a 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  0x00007fefd5287b6d in folly::SaturatingSemaphore<true, std::atomic>::tryWaitSlow<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x7fef947d7048, 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  0x00007fefd52881d6 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=0x7fef90000a40, deadline=...)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/SaturatingSemaphore.h:179
#7  0x00007fefd528b930 in folly::UnboundedBlockingQueue<folly::CPUThreadPoolExecutor::CPUTask>::try_take_for (this=0x7fef90000a00, time=...) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/LifoSem.h:498
#8  0x00007fefd52805c7 in folly::CPUThreadPoolExecutor::threadRun (this=0x7fefc453c800, thread=...) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/CPUThreadPoolExecutor.cpp:243
#9  0x00007fefd529b119 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 0x00007fefd511b928 in operator() (this=0x7fefc44c7a00) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/Function.h:416
#15 operator() (__closure=0x7fefc44c7a00) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/folly_executorpool.cc:54
#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 0x00007fefd511b803 in operator() (this=0x7fefcf9d05d0) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/Function.h:416
#18 operator() (__closure=0x7fefcf9d05c0) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/executors/thread_factory/PriorityThreadFactory.h:54
#19 folly::detail::function::FunctionTraits<void ()>::callBig<folly::PriorityThreadFactory::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 0x00007fefd1916dcf in std::execute_native_thread_routine (__p=0x7fefcf774020) at /tmp/deploy/gcc-7.3.0/libstdc++-v3/src/c++11/thread.cc:83
#21 0x00007fefd112fdd5 in start_thread () from /lib64/libpthread.so.0
#22 0x00007fefd0e58ead in clone () from /lib64/libc.so.6

Thread 20 (Thread 0x7fef96ffd700 (LWP 67657)):
#0  0x00007fefd0e531c9 in syscall () from /lib64/libc.so.6
#1  0x00007fefd527b04d 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  0x00007fefd528225a 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  0x00007fefd5287b6d in folly::SaturatingSemaphore<true, std::atomic>::tryWaitSlow<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x7fef947d7138, 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  0x00007fefd52881d6 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=0x7fef90000a40, deadline=...)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/SaturatingSemaphore.h:179
#7  0x00007fefd528b930 in folly::UnboundedBlockingQueue<folly::CPUThreadPoolExecutor::CPUTask>::try_take_for (this=0x7fef90000a00, time=...) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/LifoSem.h:498
#8  0x00007fefd52805c7 in folly::CPUThreadPoolExecutor::threadRun (this=0x7fefc453c800, thread=...) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/CPUThreadPoolExecutor.cpp:243
#9  0x00007fefd529b119 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 0x00007fefd511b928 in operator() (this=0x7fefc44c79c0) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/Function.h:416
#15 operator() (__closure=0x7fefc44c79c0) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/folly_executorpool.cc:54
#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 0x00007fefd511b803 in operator() (this=0x7fefcf9d0580) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/Function.h:416
#18 operator() (__closure=0x7fefcf9d0570) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/executors/thread_factory/PriorityThreadFactory.h:54
#19 folly::detail::function::FunctionTraits<void ()>::callBig<folly::PriorityThreadFactory::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 0x00007fefd1916dcf in std::execute_native_thread_routine (__p=0x7fefcf773fb0) at /tmp/deploy/gcc-7.3.0/libstdc++-v3/src/c++11/thread.cc:83
#21 0x00007fefd112fdd5 in start_thread () from /lib64/libpthread.so.0
#22 0x00007fefd0e58ead in clone () from /lib64/libc.so.6

Thread 19 (Thread 0x7fef977fe700 (LWP 67656)):
#0  0x00007fefd0e531c9 in syscall () from /lib64/libc.so.6
#1  0x00007fefd527b04d 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  0x00007fefd528225a 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  0x00007fefd5287b6d in folly::SaturatingSemaphore<true, std::atomic>::tryWaitSlow<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x7fef947d7018, 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  0x00007fefd52881d6 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=0x7fef90000a40, deadline=...)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/SaturatingSemaphore.h:179
#7  0x00007fefd528b930 in folly::UnboundedBlockingQueue<folly::CPUThreadPoolExecutor::CPUTask>::try_take_for (this=0x7fef90000a00, time=...) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/synchronization/LifoSem.h:498
#8  0x00007fefd52805c7 in folly::CPUThreadPoolExecutor::threadRun (this=0x7fefc453c800, thread=...) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/folly/folly-prefix/src/folly/folly/executors/CPUThreadPoolExecutor.cpp:243
#9  0x00007fefd529b119 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 0x00007fefd511b928 in operator() (this=0x7fefc44c7980) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/Function.h:416
#15 operator() (__closure=0x7fefc44c7980) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/folly_executorpool.cc:54
#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 0x00007fefd511b803 in operator() (this=0x7fefcf9d0530) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/Function.h:416
#18 operator() (__closure=0x7fefcf9d0520) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/executors/thread_factory/PriorityThreadFactory.h:54
#19 folly::detail::function::FunctionTraits<void ()>::callBig<folly::PriorityThreadFactory::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 0x00007fefd1916dcf in std::execute_native_thread_routine (__p=0x7fefcf773f40) at /tmp/deploy/gcc-7.3.0/libstdc++-v3/src/c++11/thread.cc:83
#21 0x00007fefd112fdd5 in start_thread () from /lib64/libpthread.so.0
#22 0x00007fefd0e58ead in clone () from /lib64/libc.so.6

Thread 18 (Thread 0x7fef97fff700 (LWP 67655)):
#0  0x00007fefd1133965 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007fefd2c03fa2 in background_thread_sleep (tsdn=<optimized out>, interval=<optimized out>, info=<optimized out>) at src/background_thread.c:232
#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=0x7fef97fe6a30) at src/background_thread.c:497
#4  background_thread_entry (ind_arg=<optimized out>) at src/background_thread.c:522
#5  0x00007fefd112fdd5 in start_thread () from /lib64/libpthread.so.0
#6  0x00007fefd0e58ead in clone () from /lib64/libc.so.6

Thread 17 (Thread 0x7fefbeffd700 (LWP 67491)):
#0  0x00007fefd1133965 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007fefd19111bc in __gthread_cond_wait (__mutex=<optimized out>, __cond=__cond@entry=0x7fefcf720698) at /tmp/deploy/objdir/x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu/bits/gthr-default.h:864
#2  std::condition_variable::wait (this=this@entry=0x7fefcf720698, __lock=...) at /tmp/deploy/gcc-7.3.0/libstdc++-v3/src/c++11/condition_variable.cc:53
#3  0x00000000004a2351 in Executor::run (this=0x7fefcf720540) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/executor.cc:44
#4  0x00007fefd390ecdf in Couchbase::Thread::thread_entry (this=0x7fefcf720540) at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/thread.cc:45
#5  0x00007fefd38f8767 in run (this=0x7fefd061ed10) at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:58
#6  platform_thread_wrap (arg=0x7fefd061ed10) at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:71
#7  0x00007fefd112fdd5 in start_thread () from /lib64/libpthread.so.0
#8  0x00007fefd0e58ead in clone () from /lib64/libc.so.6

Thread 16 (Thread 0x7fefbf7fe700 (LWP 67490)):
#0  0x00007fefd1133965 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007fefd19111bc in __gthread_cond_wait (__mutex=<optimized out>, __cond=__cond@entry=0x7fefcf7204d8) at /tmp/deploy/objdir/x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu/bits/gthr-default.h:864
#2  std::condition_variable::wait (this=this@entry=0x7fefcf7204d8, __lock=...) at /tmp/deploy/gcc-7.3.0/libstdc++-v3/src/c++11/condition_variable.cc:53
#3  0x00000000004a2351 in Executor::run (this=0x7fefcf720380) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/executor.cc:44
#4  0x00007fefd390ecdf in Couchbase::Thread::thread_entry (this=0x7fefcf720380) at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/thread.cc:45
#5  0x00007fefd38f8767 in run (this=0x7fefd061eb30) at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:58
#6  platform_thread_wrap (arg=0x7fefd061eb30) at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:71
#7  0x00007fefd112fdd5 in start_thread () from /lib64/libpthread.so.0
#8  0x00007fefd0e58ead in clone () from /lib64/libc.so.6

Thread 15 (Thread 0x7fefbffff700 (LWP 67489)):
#0  0x00007fefd1133965 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007fefd19111bc in __gthread_cond_wait (__mutex=<optimized out>, __cond=__cond@entry=0x7fefcf720318) at /tmp/deploy/objdir/x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu/bits/gthr-default.h:864
#2  std::condition_variable::wait (this=this@entry=0x7fefcf720318, __lock=...) at /tmp/deploy/gcc-7.3.0/libstdc++-v3/src/c++11/condition_variable.cc:53
#3  0x00000000004a2351 in Executor::run (this=0x7fefcf7201c0) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/executor.cc:44
#4  0x00007fefd390ecdf in Couchbase::Thread::thread_entry (this=0x7fefcf7201c0) at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/thread.cc:45
#5  0x00007fefd38f8767 in run (this=0x7fefd061ed70) at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:58
#6  platform_thread_wrap (arg=0x7fefd061ed70) at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:71
#7  0x00007fefd112fdd5 in start_thread () from /lib64/libpthread.so.0
#8  0x00007fefd0e58ead in clone () from /lib64/libc.so.6

Thread 14 (Thread 0x7fefc4ff9700 (LWP 67488)):
#0  0x00007fefd1133965 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007fefd19111bc in __gthread_cond_wait (__mutex=<optimized out>, __cond=__cond@entry=0x7fefcf720158) at /tmp/deploy/objdir/x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu/bits/gthr-default.h:864
#2  std::condition_variable::wait (this=this@entry=0x7fefcf720158, __lock=...) at /tmp/deploy/gcc-7.3.0/libstdc++-v3/src/c++11/condition_variable.cc:53
#3  0x00000000004a2351 in Executor::run (this=0x7fefcf720000) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/executor.cc:44
#4  0x00007fefd390ecdf in Couchbase::Thread::thread_entry (this=0x7fefcf720000) at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/thread.cc:45
#5  0x00007fefd38f8767 in run (this=0x7fefd061ed40) at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:58
#6  platform_thread_wrap (arg=0x7fefd061ed40) at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:71
#7  0x00007fefd112fdd5 in start_thread () from /lib64/libpthread.so.0
#8  0x00007fefd0e58ead in clone () from /lib64/libc.so.6

Thread 13 (Thread 0x7fefc57fa700 (LWP 67486)):
#0  0x00007fefd0e531c9 in syscall () from /lib64/libc.so.6
#1  0x00007fefd527b04d 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  0x00007fefd503f767 in folly::SharedMutexImpl<false, void, std::atomic, false, false>::waitForZeroBits<folly::SharedMutexImpl<false, void, std::atomic, false, false>::WaitForever> (this=0x7fefc42794e8, state=@0x7fefc57e09dc: 4294965633, goal=4294965248, waitMask=16, ctx=...)
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/detail/Futex-inl.h:101
#4  0x00007fefd5057998 in lockExclusiveImpl<folly::SharedMutexImpl<false>::WaitForever> (ctx=..., preconditionGoalMask=<optimized out>, state=<optimized out>, this=<optimized out>) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/SharedMutex.h:1002
#5  folly::SharedMutexImpl<false, void, std::atomic, false, false>::lockExclusiveImpl<folly::SharedMutexImpl<false, void, std::atomic, false, false>::WaitForever> (this=this@entry=0x7fefc42794e8, preconditionGoalMask=preconditionGoalMask@entry=224, ctx=...)
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/SharedMutex.h:955
#6  0x00007fefd525de6f in lock (this=0x7fefc42794e8) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/SharedMutex.h:371
#7  lock (mutex=...) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/LockTraits.h:124
#8  lock<folly::SharedMutexImpl<false> > (mutex=...) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/LockTraits.h:479
#9  LockedPtrBase (parent=0x7fefc42794e0, this=<optimized out>) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/Synchronized.h:1097
#10 LockedPtr (parent=0x7fefc42794e0, this=<optimized out>) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/Synchronized.h:1402
#11 wlock (this=0x7fefc42794e0) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/Synchronized.h:115
#12 HdrHistogram::reset (this=0x7fefc42794d8) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/utilities/hdrhistogram.cc:118
#13 0x00007fefd5169139 in EPStats::reset (this=this@entry=0x7fefc4279018) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/stats.cc:320
#14 0x00007fefd50d5464 in resetStats (this=0x7fefc4279000) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/ep_engine.cc:4788
#15 EventuallyPersistentEngine::reset_stats (this=0x7fefc4279000, cookie=...) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/ep_engine.cc:475
#16 0x00000000004d5348 in stat_reset_executor (arg=..., cookie=...) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/protocol/mcbp/stats_context.cc:158
#17 0x00000000004d4e9d in StatsCommandContext::doStats (this=this@entry=0x7fefcf8777d0) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/protocol/mcbp/stats_context.cc:727
#18 0x00000000004d5fc8 in StatsCommandContext::step (this=0x7fefcf8777d0) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/protocol/mcbp/stats_context.cc:649
#19 0x00000000004d8cc0 in SteppableCommandContext::drive (this=this@entry=0x7fefcf8777d0) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/protocol/mcbp/steppable_command_context.cc:42
#20 0x00000000004acb96 in stat_executor (cookie=...) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/mcbp_executors.cc:192
#21 0x00000000004afad6 in operator() (__args#0=..., this=<optimized out>) at /usr/local/include/c++/7.3.0/bits/std_function.h:706
#22 execute_client_request_packet (cookie=..., request=...) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/mcbp_executors.cc:919
#23 0x000000000049d094 in Cookie::doExecute (this=this@entry=0x7fefcf98e180) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/cookie.cc:157
#24 0x000000000049d1af in Cookie::execute (this=0x7fefcf98e180, useStartTime=<optimized out>) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/cookie.cc:170
#25 0x00000000004810c1 in Connection::executeCommandPipeline (this=this@entry=0x7fefcf98df00) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/connection.cc:568
#26 0x00000000004882d5 in Connection::executeCommandsCallback (this=this@entry=0x7fefcf98df00) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/connection.cc:695
#27 0x0000000000488a9f in Connection::rw_callback (bev=<optimized out>, ctx=0x7fefcf98df00) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/connection.cc:892
#28 0x00007fefd29b8d8e in bufferevent_run_deferred_callbacks_unlocked (cb=<optimized out>, arg=0x7fefcf98e400) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/bufferevent.c:208
#29 0x00007fefd29c1d01 in event_process_active_single_queue (base=base@entry=0x7fefcf8b2c00, max_to_process=max_to_process@entry=2147483647, endtime=endtime@entry=0x0, activeq=<optimized out>) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/event.c:1726
#30 0x00007fefd29c254f in event_process_active (base=0x7fefcf8b2c00) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/event.c:1789
#31 event_base_loop (base=0x7fefcf8b2c00, flags=flags@entry=0) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/event.c:2012
#32 0x0000000000468ad9 in worker_libevent (arg=0x7fefcf8e8ff8) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/thread.cc:195
#33 0x00007fefd38f8767 in run (this=0x7fefd061eb60) at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:58
#34 platform_thread_wrap (arg=0x7fefd061eb60) at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:71
#35 0x00007fefd112fdd5 in start_thread () from /lib64/libpthread.so.0
#36 0x00007fefd0e58ead in clone () from /lib64/libc.so.6

Thread 12 (Thread 0x7fefc5ffb700 (LWP 67485)):
#0  0x00007fefd0e531c9 in syscall () from /lib64/libc.so.6
#1  0x00007fefd527b04d 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  0x00007fefd503f767 in folly::SharedMutexImpl<false, void, std::atomic, false, false>::waitForZeroBits<folly::SharedMutexImpl<false, void, std::atomic, false, false>::WaitForever> (this=0x7fefc42794e8, state=@0x7fefc5fe1898: 4294965649, goal=128, waitMask=1, ctx=...)
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/detail/Futex-inl.h:101
#4  0x00007fefd525caa4 in lockSharedImpl<folly::SharedMutexImpl<false>::WaitForever> (ctx=..., token=0x0, state=@0x7fefc5fe1898: 4294965649, this=0x7fefc42794e8) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/SharedMutex.h:1669
#5  folly::SharedMutexImpl<false, void, std::atomic, false, false>::lockSharedImpl<folly::SharedMutexImpl<false, void, std::atomic, false, false>::WaitForever> (this=this@entry=0x7fefc42794e8, ctx=..., token=0x0) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/SharedMutex.h:1298
#6  0x00007fefd525cc34 in lock_shared (this=0x7fefc42794e8) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/SharedMutex.h:413
#7  lock_shared (mutex=...) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/LockTraits.h:157
#8  lock<folly::SharedMutexImpl<false> > (mutex=...) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/LockTraits.h:499
#9  LockedPtrBase (parent=0x7fefc42794e0, this=<optimized out>) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/Synchronized.h:1097
#10 LockedPtr (parent=0x7fefc42794e0, this=<optimized out>) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/Synchronized.h:1402
#11 rlock (this=0x7fefc42794e0) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/Synchronized.h:141
#12 HdrHistogram::addValueAndCount (this=0x7fefc42794d8, v=5, count=1) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/utilities/hdrhistogram.cc:102
#13 0x00007fefd50dafee in ~ScopeTimer2 (this=0x7fefc5fe1950, __in_chrg=<optimized out>) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/utilities/hdrhistogram.h:407
#14 EventuallyPersistentEngine::getInner (this=this@entry=0x7fefc4279000, cookie=0x7fef621a4400, key=..., vbucket=..., options=options@entry=(TRACK_STATISTICS | QUEUE_BG_FETCH | HONOR_STATES | TRACK_REFERENCE | DELETE_TEMP | HIDE_LOCKED_CAS)) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/ep_engine.cc:2233
#15 0x00007fefd50db0f5 in EventuallyPersistentEngine::get (this=0x7fefc4279000, cookie=..., key=..., vbucket=..., documentStateFilter=<optimized out>) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/ep_engine.cc:296
#16 0x000000000044e6c9 in bucket_get (cookie=..., key=..., vbucket=..., documentStateFilter=<optimized out>, documentStateFilter@entry=Alive) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/protocol/mcbp/engine_wrapper.cc:197
#17 0x00000000004c98e4 in GetCommandContext::getItem (this=this@entry=0x7fefc46aa8e0) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/protocol/mcbp/get_context.cc:32
#18 0x00000000004c9bc8 in GetCommandContext::step (this=0x7fefc46aa8e0) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/protocol/mcbp/get_context.cc:161
#19 0x00000000004d8cc0 in SteppableCommandContext::drive (this=this@entry=0x7fefc46aa8e0) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/protocol/mcbp/steppable_command_context.cc:42
#20 0x00000000004ade6c in process_bin_get (cookie=...) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/mcbp_executors.cc:86
#21 get_executor (cookie=...) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/mcbp_executors.cc:184
#22 0x00000000004afad6 in operator() (__args#0=..., this=<optimized out>) at /usr/local/include/c++/7.3.0/bits/std_function.h:706
#23 execute_client_request_packet (cookie=..., request=...) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/mcbp_executors.cc:919
#24 0x000000000049d094 in Cookie::doExecute (this=this@entry=0x7fef621a4400) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/cookie.cc:157
#25 0x000000000049d1af in Cookie::execute (this=0x7fef621a4400, useStartTime=<optimized out>) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/cookie.cc:170
#26 0x00000000004810c1 in Connection::executeCommandPipeline (this=this@entry=0x7fef6219b580) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/connection.cc:568
#27 0x00000000004882d5 in Connection::executeCommandsCallback (this=this@entry=0x7fef6219b580) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/connection.cc:695
#28 0x0000000000488a9f in Connection::rw_callback (bev=<optimized out>, ctx=0x7fef6219b580) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/connection.cc:892
#29 0x00007fefd29b8d8e in bufferevent_run_deferred_callbacks_unlocked (cb=<optimized out>, arg=0x7fef621a4680) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/bufferevent.c:208
#30 0x00007fefd29c1d01 in event_process_active_single_queue (base=base@entry=0x7fefcf8b2900, max_to_process=max_to_process@entry=2147483647, endtime=endtime@entry=0x0, activeq=<optimized out>) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/event.c:1726
#31 0x00007fefd29c254f in event_process_active (base=0x7fefcf8b2900) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/event.c:1789
#32 event_base_loop (base=0x7fefcf8b2900, flags=flags@entry=0) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/event.c:2012
#33 0x0000000000468ad9 in worker_libevent (arg=0x7fefcf8e8550) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/thread.cc:195
#34 0x00007fefd38f8767 in run (this=0x7fefd061ece0) at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:58
#35 platform_thread_wrap (arg=0x7fefd061ece0) at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:71
#36 0x00007fefd112fdd5 in start_thread () from /lib64/libpthread.so.0
#37 0x00007fefd0e58ead in clone () from /lib64/libc.so.6

Thread 11 (Thread 0x7fefc67fc700 (LWP 67484)):
#0  0x00007fefd0e531c9 in syscall () from /lib64/libc.so.6
#1  0x00007fefd527b04d 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  0x00007fefd503f767 in folly::SharedMutexImpl<false, void, std::atomic, false, false>::waitForZeroBits<folly::SharedMutexImpl<false, void, std::atomic, false, false>::WaitForever> (this=0x7fefc42794e8, state=@0x7fefc67e2898: 4294965632, goal=128, waitMask=1, ctx=...)
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/detail/Futex-inl.h:101
#4  0x00007fefd525caa4 in lockSharedImpl<folly::SharedMutexImpl<false>::WaitForever> (ctx=..., token=0x0, state=@0x7fefc67e2898: 4294965632, this=0x7fefc42794e8) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/SharedMutex.h:1669
#5  folly::SharedMutexImpl<false, void, std::atomic, false, false>::lockSharedImpl<folly::SharedMutexImpl<false, void, std::atomic, false, false>::WaitForever> (this=this@entry=0x7fefc42794e8, ctx=..., token=0x0) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/SharedMutex.h:1298
#6  0x00007fefd525cc34 in lock_shared (this=0x7fefc42794e8) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/SharedMutex.h:413
#7  lock_shared (mutex=...) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/LockTraits.h:157
#8  lock<folly::SharedMutexImpl<false> > (mutex=...) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/LockTraits.h:499
#9  LockedPtrBase (parent=0x7fefc42794e0, this=<optimized out>) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/Synchronized.h:1097
#10 LockedPtr (parent=0x7fefc42794e0, this=<optimized out>) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/Synchronized.h:1402
#11 rlock (this=0x7fefc42794e0) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/Synchronized.h:141
#12 HdrHistogram::addValueAndCount (this=0x7fefc42794d8, v=5, count=1) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/utilities/hdrhistogram.cc:102
#13 0x00007fefd50dafee in ~ScopeTimer2 (this=0x7fefc67e2950, __in_chrg=<optimized out>) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/utilities/hdrhistogram.h:407
#14 EventuallyPersistentEngine::getInner (this=this@entry=0x7fefc4279000, cookie=0x7fef6219cc00, key=..., vbucket=..., options=options@entry=(TRACK_STATISTICS | QUEUE_BG_FETCH | HONOR_STATES | TRACK_REFERENCE | DELETE_TEMP | HIDE_LOCKED_CAS)) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/ep_engine.cc:2233
#15 0x00007fefd50db0f5 in EventuallyPersistentEngine::get (this=0x7fefc4279000, cookie=..., key=..., vbucket=..., documentStateFilter=<optimized out>) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/ep_engine.cc:296
#16 0x000000000044e6c9 in bucket_get (cookie=..., key=..., vbucket=..., documentStateFilter=<optimized out>, documentStateFilter@entry=Alive) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/protocol/mcbp/engine_wrapper.cc:197
#17 0x00000000004c98e4 in GetCommandContext::getItem (this=this@entry=0x7fefcf8829e0) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/protocol/mcbp/get_context.cc:32
#18 0x00000000004c9bc8 in GetCommandContext::step (this=0x7fefcf8829e0) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/protocol/mcbp/get_context.cc:161
#19 0x00000000004d8cc0 in SteppableCommandContext::drive (this=this@entry=0x7fefcf8829e0) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/protocol/mcbp/steppable_command_context.cc:42
#20 0x00000000004ade6c in process_bin_get (cookie=...) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/mcbp_executors.cc:86
#21 get_executor (cookie=...) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/mcbp_executors.cc:184
#22 0x00000000004afad6 in operator() (__args#0=..., this=<optimized out>) at /usr/local/include/c++/7.3.0/bits/std_function.h:706
#23 execute_client_request_packet (cookie=..., request=...) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/mcbp_executors.cc:919
#24 0x000000000049d094 in Cookie::doExecute (this=this@entry=0x7fef6219cc00) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/cookie.cc:157
#25 0x000000000049d1af in Cookie::execute (this=0x7fef6219cc00, useStartTime=<optimized out>) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/cookie.cc:170
#26 0x00000000004810c1 in Connection::executeCommandPipeline (this=this@entry=0x7fef6219c980) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/connection.cc:568
#27 0x00000000004882d5 in Connection::executeCommandsCallback (this=this@entry=0x7fef6219c980) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/connection.cc:695
#28 0x0000000000488a9f in Connection::rw_callback (bev=<optimized out>, ctx=0x7fef6219c980) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/connection.cc:892
#29 0x00007fefd29b8d8e in bufferevent_run_deferred_callbacks_unlocked (cb=<optimized out>, arg=0x7fef6219ce80) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/bufferevent.c:208
#30 0x00007fefd29c1d01 in event_process_active_single_queue (base=base@entry=0x7fefcf8b2600, max_to_process=max_to_process@entry=2147483647, endtime=endtime@entry=0x0, activeq=<optimized out>) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/event.c:1726
#31 0x00007fefd29c254f in event_process_active (base=0x7fefcf8b2600) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/event.c:1789
#32 event_base_loop (base=0x7fefcf8b2600, flags=flags@entry=0) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/event.c:2012
#33 0x0000000000468ad9 in worker_libevent (arg=0x7fefcf8e7aa8) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/thread.cc:195
#34 0x00007fefd38f8767 in run (this=0x7fefd061ebc0) at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:58
#35 platform_thread_wrap (arg=0x7fefd061ebc0) at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:71
#36 0x00007fefd112fdd5 in start_thread () from /lib64/libpthread.so.0
#37 0x00007fefd0e58ead in clone () from /lib64/libc.so.6

Thread 10 (Thread 0x7fefc6ffd700 (LWP 67483)):
#0  0x00007fefd0e531c9 in syscall () from /lib64/libc.so.6
#1  0x00007fefd527b04d 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  0x00007fefd503f767 in folly::SharedMutexImpl<false, void, std::atomic, false, false>::waitForZeroBits<folly::SharedMutexImpl<false, void, std::atomic, false, false>::WaitForever> (this=0x7fefc42794e8, state=@0x7fefc6fe3898: 4294965649, goal=128, waitMask=1, ctx=...)
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/detail/Futex-inl.h:101
#4  0x00007fefd525caa4 in lockSharedImpl<folly::SharedMutexImpl<false>::WaitForever> (ctx=..., token=0x0, state=@0x7fefc6fe3898: 4294965649, this=0x7fefc42794e8) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/SharedMutex.h:1669
#5  folly::SharedMutexImpl<false, void, std::atomic, false, false>::lockSharedImpl<folly::SharedMutexImpl<false, void, std::atomic, false, false>::WaitForever> (this=this@entry=0x7fefc42794e8, ctx=..., token=0x0) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/SharedMutex.h:1298
#6  0x00007fefd525cc34 in lock_shared (this=0x7fefc42794e8) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/SharedMutex.h:413
#7  lock_shared (mutex=...) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/LockTraits.h:157
#8  lock<folly::SharedMutexImpl<false> > (mutex=...) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/LockTraits.h:499
#9  LockedPtrBase (parent=0x7fefc42794e0, this=<optimized out>) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/Synchronized.h:1097
#10 LockedPtr (parent=0x7fefc42794e0, this=<optimized out>) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/Synchronized.h:1402
#11 rlock (this=0x7fefc42794e0) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/Synchronized.h:141
#12 HdrHistogram::addValueAndCount (this=0x7fefc42794d8, v=5, count=1) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/utilities/hdrhistogram.cc:102
#13 0x00007fefd50dafee in ~ScopeTimer2 (this=0x7fefc6fe3950, __in_chrg=<optimized out>) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/utilities/hdrhistogram.h:407
#14 EventuallyPersistentEngine::getInner (this=this@entry=0x7fefc4279000, cookie=0x7fef6219ba80, key=..., vbucket=..., options=options@entry=(TRACK_STATISTICS | QUEUE_BG_FETCH | HONOR_STATES | TRACK_REFERENCE | DELETE_TEMP | HIDE_LOCKED_CAS)) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/ep_engine.cc:2233
#15 0x00007fefd50db0f5 in EventuallyPersistentEngine::get (this=0x7fefc4279000, cookie=..., key=..., vbucket=..., documentStateFilter=<optimized out>) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/ep_engine.cc:296
#16 0x000000000044e6c9 in bucket_get (cookie=..., key=..., vbucket=..., documentStateFilter=<optimized out>, documentStateFilter@entry=Alive) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/protocol/mcbp/engine_wrapper.cc:197
#17 0x00000000004c98e4 in GetCommandContext::getItem (this=this@entry=0x7fefcf881f60) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/protocol/mcbp/get_context.cc:32
#18 0x00000000004c9bc8 in GetCommandContext::step (this=0x7fefcf881f60) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/protocol/mcbp/get_context.cc:161
#19 0x00000000004d8cc0 in SteppableCommandContext::drive (this=this@entry=0x7fefcf881f60) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/protocol/mcbp/steppable_command_context.cc:42
#20 0x00000000004ade6c in process_bin_get (cookie=...) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/mcbp_executors.cc:86
#21 get_executor (cookie=...) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/mcbp_executors.cc:184
#22 0x00000000004afad6 in operator() (__args#0=..., this=<optimized out>) at /usr/local/include/c++/7.3.0/bits/std_function.h:706
#23 execute_client_request_packet (cookie=..., request=...) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/mcbp_executors.cc:919
#24 0x000000000049d094 in Cookie::doExecute (this=this@entry=0x7fef6219ba80) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/cookie.cc:157
#25 0x000000000049d1af in Cookie::execute (this=0x7fef6219ba80, useStartTime=<optimized out>) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/cookie.cc:170
#26 0x00000000004810c1 in Connection::executeCommandPipeline (this=this@entry=0x7fef6219b800) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/connection.cc:568
#27 0x00000000004882d5 in Connection::executeCommandsCallback (this=this@entry=0x7fef6219b800) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/connection.cc:695
#28 0x0000000000488a9f in Connection::rw_callback (bev=<optimized out>, ctx=0x7fef6219b800) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/connection.cc:892
#29 0x00007fefd29b8d8e in bufferevent_run_deferred_callbacks_unlocked (cb=<optimized out>, arg=0x7fef6219bd00) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/bufferevent.c:208
#30 0x00007fefd29c1d01 in event_process_active_single_queue (base=base@entry=0x7fefcf8b2300, max_to_process=max_to_process@entry=2147483647, endtime=endtime@entry=0x0, activeq=<optimized out>) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/event.c:1726
#31 0x00007fefd29c254f in event_process_active (base=0x7fefcf8b2300) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/event.c:1789
#32 event_base_loop (base=0x7fefcf8b2300, flags=flags@entry=0) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/event.c:2012
#33 0x0000000000468ad9 in worker_libevent (arg=0x7fefcf8e7000) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/thread.cc:195
#34 0x00007fefd38f8767 in run (this=0x7fefd061e9e0) at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:58
#35 platform_thread_wrap (arg=0x7fefd061e9e0) at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:71
#36 0x00007fefd112fdd5 in start_thread () from /lib64/libpthread.so.0
#37 0x00007fefd0e58ead in clone () from /lib64/libc.so.6

Thread 9 (Thread 0x7fefc77fe700 (LWP 67480)):
#0  0x00007fefd1133d12 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00000000004f10f6 in __gthread_cond_timedwait (__abs_timeout=0x7fefc77e51b0, __mutex=<optimized out>, __cond=0x7fefcf8698f8) 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=0x7fefcf8698f8) 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=0x7fefcf8698f8) at /usr/local/include/c++/7.3.0/condition_variable:106
#4  wait_for<long, std::ratio<1> > (__rtime=..., __lock=..., this=0x7fefcf8698f8) at /usr/local/include/c++/7.3.0/condition_variable:138
#5  AuditImpl::consume_events (this=0x7fefcf869500) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/auditd/src/audit.cc:408
#6  0x00007fefd38f8767 in run (this=0x7fefd0781720) at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:58
#7  platform_thread_wrap (arg=0x7fefd0781720) at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:71
#8  0x00007fefd112fdd5 in start_thread () from /lib64/libpthread.so.0
#9  0x00007fefd0e58ead in clone () from /lib64/libc.so.6

Thread 8 (Thread 0x7fefc7fff700 (LWP 67471)):
#0  0x00007fefd1133d12 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00000000004918e0 in __gthread_cond_timedwait (__abs_timeout=0x7fefc7fe6190, __mutex=<optimized out>, __cond=0x7fefd06280f8) 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=<synthetic pointer>, this=0x7fefd06280f8) at /usr/local/include/c++/7.3.0/condition_variable:166
#3  wait_until<std::chrono::duration<long, std::ratio<1, 1000000000> > > (__atime=..., __lock=<synthetic pointer>, this=0x7fefd06280f8) at /usr/local/include/c++/7.3.0/condition_variable:106
#4  wait_for<long, std::ratio<1, 1000000000> > (__rtime=<synthetic pointer>, __lock=<synthetic pointer>, this=0x7fefd06280f8) at /usr/local/include/c++/7.3.0/condition_variable:138
#5  ExternalAuthManagerThread::run (this=0x7fefd0628000) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/external_auth_manager_thread.cc:229
#6  0x00007fefd390ecdf in Couchbase::Thread::thread_entry (this=0x7fefd0628000) at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/thread.cc:45
#7  0x00007fefd38f8767 in run (this=0x7fefd07819c0) at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:58
#8  platform_thread_wrap (arg=0x7fefd07819c0) at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:71
#9  0x00007fefd112fdd5 in start_thread () from /lib64/libpthread.so.0
#10 0x00007fefd0e58ead in clone () from /lib64/libc.so.6

Thread 7 (Thread 0x7fefccc79700 (LWP 67470)):
#0  0x00007fefd1133965 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007fefd4ce469b in produce_socket (sp=0x7fefccc60100, ctx=0x1e571a0) 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:18890
#2  accept_new_connection (ctx=0x1e571a0, listener=<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:19232
#3  master_thread_run (ctx=0x1e571a0) 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:19300
#4  master_thread (thread_func_param=0x1e571a0) 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
#5  0x00007fefd112fdd5 in start_thread () from /lib64/libpthread.so.0
#6  0x00007fefd0e58ead in clone () from /lib64/libc.so.6

Thread 6 (Thread 0x7fefcd47a700 (LWP 67469)):
#0  0x00007fefd11364ed in __lll_lock_wait () from /lib64/libpthread.so.0
#1  0x00007fefd1131dcb in _L_lock_883 () from /lib64/libpthread.so.0
#2  0x00007fefd1131c98 in pthread_mutex_lock () from /lib64/libpthread.so.0
#3  0x000000000041d417 in __gthread_mutex_lock (__mutex=0x8784c0 <buckets_lock>) at /usr/local/include/c++/7.3.0/x86_64-pc-linux-gnu/bits/gthr-default.h:748
#4  lock (this=0x8784c0 <buckets_lock>) at /usr/local/include/c++/7.3.0/bits/std_mutex.h:103
#5  lock_guard (__m=..., this=<synthetic pointer>) at /usr/local/include/c++/7.3.0/bits/std_mutex.h:162
#6  bucketsForEach(std::function<bool (Bucket&, void*)>, void*) (fn=..., arg=arg@entry=0x0) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/memcached.cc:96
#7  0x00000000004649fe in server_prometheus_stats (collector=..., cardinality=cb::prometheus::Low) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/stats.cc:192
#8  0x00007fefd4cd41d2 in cb::prometheus::MetricServer::KVCollectable::Collect (this=0x7fefcf863010) at /usr/local/include/c++/7.3.0/bits/std_function.h:706
#9  0x00007fefd4cf2ffb in prometheus::detail::CollectMetrics (collectables=...) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/prometheus-cpp/prometheus-cpp-prefix/src/prometheus-cpp/pull/src/metrics_collector.cc:18
#10 0x00007fefd4cf1e78 in prometheus::detail::MetricsHandler::handleGet (this=0x7fefd0627780, conn=0x1e587b8) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/prometheus-cpp/prometheus-cpp-prefix/src/prometheus-cpp/pull/src/handler.cc:129
#11 0x00007fefd4cdfec7 in CivetServer::requestHandler (conn=0x1e587b8, cbdata=0x7fefd0627780) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/prometheus-cpp/prometheus-cpp-prefix/src/prometheus-cpp/3rdparty/civetweb/src/CivetServer.cpp:152
#12 0x00007fefd4cecdbd in handle_request (conn=conn@entry=0x1e587b8) 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:14657
#13 0x00007fefd4cede19 in process_new_connection (conn=0x1e587b8) 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:18673
#14 worker_thread_run (conn=0x1e587b8) 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:19090
#15 worker_thread (thread_func_param=0x1e587b8) 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
#16 0x00007fefd112fdd5 in start_thread () from /lib64/libpthread.so.0
#17 0x00007fefd0e58ead in clone () from /lib64/libc.so.6

Thread 5 (Thread 0x7fefcdc7b700 (LWP 67468)):
#0  0x00007fefd0e531c9 in syscall () from /lib64/libc.so.6
#1  0x00007fefd4d17b2d 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  0x00007fefd4cd1cb7 in folly::SharedMutexImpl<false, void, std::atomic, false, false>::waitForZeroBits<folly::SharedMutexImpl<false, void, std::atomic, false, false>::WaitForever> (this=0x7fefc42794e8, state=@0x7fefcdc5d658: 4294965649, goal=128, waitMask=1, ctx=...)
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/detail/Futex-inl.h:101
#4  0x00007fefd4cd8db4 in lockSharedImpl<folly::SharedMutexImpl<false>::WaitForever> (ctx=..., token=0x0, state=@0x7fefcdc5d658: 4294965649, this=0x7fefc42794e8) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/SharedMutex.h:1669
#5  folly::SharedMutexImpl<false, void, std::atomic, false, false>::lockSharedImpl<folly::SharedMutexImpl<false, void, std::atomic, false, false>::WaitForever> (this=this@entry=0x7fefc42794e8, ctx=..., token=0x0) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/SharedMutex.h:1298
#6  0x00007fefd4cd8f9c in lock_shared (this=0x7fefc42794e8) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/SharedMutex.h:413
#7  lock_shared (mutex=...) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/LockTraits.h:157
#8  lock<folly::SharedMutexImpl<false> > (mutex=...) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/LockTraits.h:499
#9  LockedPtrBase (parent=0x7fefc42794e0, this=<optimized out>) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/Synchronized.h:1097
#10 LockedPtr (parent=0x7fefc42794e0, this=<optimized out>) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/Synchronized.h:1402
#11 rlock (this=0x7fefc42794e0) at /home/couchbase/jenkins/workspace/couchbase-server-unix/server_build/tlm/deps/folly.exploded/include/folly/Synchronized.h:144
#12 HdrHistogram::getValueCount (this=this@entry=0x7fefc42794d8) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/utilities/hdrhistogram.cc:106
#13 0x00007fefd4cd4dd5 in PrometheusStatCollector::addStat (this=0x7fefcdc5dc10, spec=..., v=..., labels=...) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/statistics/prometheus_collector.cc:60
#14 0x00007fefd4cc9da1 in LabelledStatCollector::addStat (this=0x7fefcdc5da70, k=..., v=..., labels=...) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/include/statistics/labelled_collector.h:134
#15 0x00007fefd50da350 in StatCollector::addStat<cb::stats::Key, Hdr1sfMicroSecHistogram&>(cb::stats::Key&&, Hdr1sfMicroSecHistogram&) const (this=this@entry=0x7fefcdc5da70, v=..., k=<optimized out>) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/include/statistics/collector.h:323
#16 0x00007fefd50da440 in EventuallyPersistentEngine::doTimingStats (this=0x7fefc4279000, collector=...) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/ep_engine.cc:4035
#17 0x00007fefd50f20b5 in EventuallyPersistentEngine::get_prometheus_stats (this=0x7fefc4279000, collector=..., cardinality=<optimized out>) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/ep_engine.cc:379
#18 0x0000000000467ae8 in operator() (bucket=..., __closure=0x7fefcdc5db30) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/stats.cc:201
#19 std::_Function_handler<bool(Bucket&, void*), server_prometheus_stats(const StatCollector&, cb::prometheus::Cardinality)::<lambda(Bucket&, void*)> >::_M_invoke(const std::_Any_data &, Bucket &, <unknown type in /usr/lib/debug/opt/couchbase/bin/memcached.debug, CU 0x5bc22f, DIE 0x5d71b7>) (__functor=..., __args#0=..., __args#1=<optimized out>)
    at /usr/local/include/c++/7.3.0/bits/std_function.h:302
#20 0x000000000041d4d2 in operator() (__args#1=<optimized out>, __args#0=..., this=0x7fefcdc5db30) at /usr/local/include/c++/7.3.0/bits/std_function.h:706
#21 bucketsForEach(std::function<bool (Bucket&, void*)>, void*) (fn=..., arg=arg@entry=0x0) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/memcached.cc:118
#22 0x00000000004649fe in server_prometheus_stats (collector=..., cardinality=cb::prometheus::High) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/stats.cc:192
#23 0x00007fefd4cd41d2 in cb::prometheus::MetricServer::KVCollectable::Collect (this=0x7fefcf863590) at /usr/local/include/c++/7.3.0/bits/std_function.h:706
#24 0x00007fefd4cf2ffb in prometheus::detail::CollectMetrics (collectables=...) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/prometheus-cpp/prometheus-cpp-prefix/src/prometheus-cpp/pull/src/metrics_collector.cc:18
#25 0x00007fefd4cf1e78 in prometheus::detail::MetricsHandler::handleGet (this=0x7fefd0627080, conn=0x1e57dd0) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/prometheus-cpp/prometheus-cpp-prefix/src/prometheus-cpp/pull/src/handler.cc:129
#26 0x00007fefd4cdfec7 in CivetServer::requestHandler (conn=0x1e57dd0, cbdata=0x7fefd0627080) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/prometheus-cpp/prometheus-cpp-prefix/src/prometheus-cpp/3rdparty/civetweb/src/CivetServer.cpp:152
#27 0x00007fefd4cecdbd in handle_request (conn=conn@entry=0x1e57dd0) 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:14657
#28 0x00007fefd4cede19 in process_new_connection (conn=0x1e57dd0) 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:18673
#29 worker_thread_run (conn=0x1e57dd0) 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:19090
#30 worker_thread (thread_func_param=0x1e57dd0) 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
#31 0x00007fefd112fdd5 in start_thread () from /lib64/libpthread.so.0
#32 0x00007fefd0e58ead in clone () from /lib64/libc.so.6

Thread 4 (Thread 0x7fefce47c700 (LWP 67467)):
#0  0x00007fefd0e4e20d in poll () from /lib64/libc.so.6
#1  0x0000000000467d4e in get_command (buffsize=80, buffer=0x7fefce463190 "") at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/stdin_check.cc:49
#2  check_stdin_thread (arg=<optimized out>) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/stdin_check.cc:90
#3  0x00007fefd38f8767 in run (this=0x7fefd0781270) at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:58
#4  platform_thread_wrap (arg=0x7fefd0781270) at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:71
#5  0x00007fefd112fdd5 in start_thread () from /lib64/libpthread.so.0
#6  0x00007fefd0e58ead in clone () from /lib64/libc.so.6

Thread 3 (Thread 0x7fefcec7d700 (LWP 67466)):
#0  0x00007fefd1133d12 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007fefd442df7a in __gthread_cond_timedwait (__abs_timeout=0x7fefcec641b0, __mutex=<optimized out>, __cond=<optimized out>) 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=<optimized out>) 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=<optimized out>) 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=<optimized out>) 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=<optimized out>) at /usr/local/include/c++/7.3.0/condition_variable:145
#6  operator() (__closure=0x7fefcf855a88) 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=<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=0x7fefcf855a88) at /usr/local/include/c++/7.3.0/thread:234
#10 operator() (this=0x7fefcf855a88) at /usr/local/include/c++/7.3.0/thread:243
#11 _ZNSt6thread11_State_implINS_8_InvokerISt5tupleIJZN6spdlog7details15periodic_workerC4ERKSt8functionIFvvEENSt6chrono8durationIlSt5ratioILl1ELl1EEEEEUlvE_EEEEE6_M_runEv (this=0x7fefcf855a80) at /usr/local/include/c++/7.3.0/thread:186
#12 0x00007fefd1916dcf in std::execute_native_thread_routine (__p=0x7fefcf855a80) at /tmp/deploy/gcc-7.3.0/libstdc++-v3/src/c++11/thread.cc:83
#13 0x00007fefd112fdd5 in start_thread () from /lib64/libpthread.so.0
#14 0x00007fefd0e58ead in clone () from /lib64/libc.so.6

Thread 2 (Thread 0x7fefcf47e700 (LWP 67465)):
#0  0x00007fefd1133d12 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007fefd442e8bd in __gthread_cond_timedwait (__abs_timeout=0x7fefcf464f60, __mutex=<optimized out>, __cond=0x7fefd0612538) 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=0x7fefd0612538) 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=0x7fefd0612538) 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=0x7fefd0612538) 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=0x7fefd0612538) at /usr/local/include/c++/7.3.0/condition_variable:145
#6  dequeue_for (wait_duration=..., popped_item=..., this=0x7fefd0612510) 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=0x7fefd0612510) at /home/couchbase/jenkins/workspace/couchbase-server-unix/third_party/spdlog/include/spdlog/details/thread_pool.h:193
#8  0x00007fefd442ee10 in spdlog::details::thread_pool::worker_loop_ (this=0x7fefd0612510) at /home/couchbase/jenkins/workspace/couchbase-server-unix/third_party/spdlog/include/spdlog/details/thread_pool.h:184
#9  0x00007fefd1916dcf in std::execute_native_thread_routine (__p=0x7fefd0645140) at /tmp/deploy/gcc-7.3.0/libstdc++-v3/src/c++11/thread.cc:83
#10 0x00007fefd112fdd5 in start_thread () from /lib64/libpthread.so.0
#11 0x00007fefd0e58ead in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x7fefd01ff700 (LWP 67463)):
#0  0x00007fefd1133d12 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007fefd2c045a7 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=0x7fefd01e6a30) at src/background_thread.c:452
#4  background_work (ind=<optimized out>, tsd=0x7fefd01e6a30) at src/background_thread.c:490
#5  background_thread_entry (ind_arg=<optimized out>) at src/background_thread.c:522
#6  0x00007fefd112fdd5 in start_thread () from /lib64/libpthread.so.0
#7  0x00007fefd0e58ead in clone () from /lib64/libc.so.6