(gdb) thread apply all bt

Thread 27 (LWP 20008):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225
#1  0x00007f14aeefbc2b in __gthread_cond_timedwait (__abs_timeout=0x7f146dff8dd0, __mutex=<optimized out>, __cond=0x7f14a72973a8) at /usr/include/x86_64-linux-gnu/c++/7/bits/gthr-default.h:871
#2  std::condition_variable::__wait_until_impl<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (__atime=..., __lock=..., this=<optimized out>) at /usr/include/c++/7/condition_variable:178
#3  std::condition_variable::wait_until<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (__atime=..., __lock=..., this=<optimized out>) at /usr/include/c++/7/condition_variable:106
#4  std::condition_variable::wait_for<long, std::ratio<1l, 1000000000l> > (__rtime=..., __lock=..., this=<optimized out>) at /usr/include/c++/7/condition_variable:143
#5  SyncObject::wait_for (nanoSecs=..., lock=..., this=<optimized out>) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/syncobject.h:53
#6  TaskQueue::_doSleep (this=this@entry=0x7f14a7297380, t=..., lock=...) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/taskqueue.cc:98
#7  0x00007f14aeefd09f in TaskQueue::_sleepThenFetchNextTask (t=..., this=0x7f14a7297380) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/taskqueue.cc:119
#8  TaskQueue::sleepThenFetchNextTask (this=this@entry=0x7f14a7297380, thread=...) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/taskqueue.cc:158
#9  0x00007f14aee8ceb7 in ExecutorPool::_nextTask (this=0x7f14a71cc800, t=..., tick=tick@entry=83 'S') at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/executorpool.cc:190
#10 0x00007f14aee8cf38 in ExecutorPool::nextTask (this=<optimized out>, t=..., tick=tick@entry=83 'S') at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/executorpool.cc:204
#11 0x00007f14aee968d6 in ExecutorThread::run (this=0x7f14a7221960) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/executorthread.cc:129
#12 0x00007f14ae26b3e7 in CouchbaseThread::run (this=0x7f14aa3ac810) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/platform/src/cb_pthreads.cc:58
#13 platform_thread_wrap (arg=0x7f14aa3ac810) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/platform/src/cb_pthreads.cc:71
#14 0x00007f14ac13e6ba in start_thread (arg=0x7f146dffb700) at pthread_create.c:333
#15 0x00007f14abe7441d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 26 (LWP 20007):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225
#1  0x00007f14aeefbc2b in __gthread_cond_timedwait (__abs_timeout=0x7f146e7f9dd0, __mutex=<optimized out>, __cond=0x7f14a72973a8) at /usr/include/x86_64-linux-gnu/c++/7/bits/gthr-default.h:871
#2  std::condition_variable::__wait_until_impl<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (__atime=..., __lock=..., this=<optimized out>) at /usr/include/c++/7/condition_variable:178
#3  std::condition_variable::wait_until<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (__atime=..., __lock=..., this=<optimized out>) at /usr/include/c++/7/condition_variable:106
#4  std::condition_variable::wait_for<long, std::ratio<1l, 1000000000l> > (__rtime=..., __lock=..., this=<optimized out>) at /usr/include/c++/7/condition_variable:143
#5  SyncObject::wait_for (nanoSecs=..., lock=..., this=<optimized out>) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/syncobject.h:53
#6  TaskQueue::_doSleep (this=this@entry=0x7f14a7297380, t=..., lock=...) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/taskqueue.cc:98
#7  0x00007f14aeefd09f in TaskQueue::_sleepThenFetchNextTask (t=..., this=0x7f14a7297380) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/taskqueue.cc:119
#8  TaskQueue::sleepThenFetchNextTask (this=this@entry=0x7f14a7297380, thread=...) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/taskqueue.cc:158
#9  0x00007f14aee8ceb7 in ExecutorPool::_nextTask (this=0x7f14a71cc800, t=..., tick=tick@entry=26 '\032') at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/executorpool.cc:190
#10 0x00007f14aee8cf38 in ExecutorPool::nextTask (this=<optimized out>, t=..., tick=tick@entry=26 '\032') at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/executorpool.cc:204
#11 0x00007f14aee968d6 in ExecutorThread::run (this=0x7f14a7221880) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/executorthread.cc:129
#12 0x00007f14ae26b3e7 in CouchbaseThread::run (this=0x7f14aa3ac7e0) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/platform/src/cb_pthreads.cc:58
#13 platform_thread_wrap (arg=0x7f14aa3ac7e0) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/platform/src/cb_pthreads.cc:71
#14 0x00007f14ac13e6ba in start_thread (arg=0x7f146e7fc700) at pthread_create.c:333
#15 0x00007f14abe7441d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 25 (LWP 20006):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225
#1  0x00007f14aeefbc2b in __gthread_cond_timedwait (__abs_timeout=0x7f146effadd0, __mutex=<optimized out>, __cond=0x7f14a7297228) at /usr/include/x86_64-linux-gnu/c++/7/bits/gthr-default.h:871
#2  std::condition_variable::__wait_until_impl<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (__atime=..., __lock=..., this=<optimized out>) at /usr/include/c++/7/condition_variable:178
#3  std::condition_variable::wait_until<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (__atime=..., __lock=..., this=<optimized out>) at /usr/include/c++/7/condition_variable:106
#4  std::condition_variable::wait_for<long, std::ratio<1l, 1000000000l> > (__rtime=..., __lock=..., this=<optimized out>) at /usr/include/c++/7/condition_variable:143
#5  SyncObject::wait_for (nanoSecs=..., lock=..., this=<optimized out>) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/syncobject.h:53
#6  TaskQueue::_doSleep (this=this@entry=0x7f14a7297200, t=..., lock=...) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/taskqueue.cc:98
#7  0x00007f14aeefd09f in TaskQueue::_sleepThenFetchNextTask (t=..., this=0x7f14a7297200) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/taskqueue.cc:119
#8  TaskQueue::sleepThenFetchNextTask (this=this@entry=0x7f14a7297200, thread=...) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/taskqueue.cc:158
#9  0x00007f14aee8ceb7 in ExecutorPool::_nextTask (this=0x7f14a71cc800, t=..., tick=tick@entry=50 '2') at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/executorpool.cc:190
#10 0x00007f14aee8cf38 in ExecutorPool::nextTask (this=<optimized out>, t=..., tick=tick@entry=50 '2') at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/executorpool.cc:204
#11 0x00007f14aee968d6 in ExecutorThread::run (this=0x7f14a72217a0) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/executorthread.cc:129
#12 0x00007f14ae26b3e7 in CouchbaseThread::run (this=0x7f14aa3ac7b0) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/platform/src/cb_pthreads.cc:58
#13 platform_thread_wrap (arg=0x7f14aa3ac7b0) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/platform/src/cb_pthreads.cc:71
#14 0x00007f14ac13e6ba in start_thread (arg=0x7f146effd700) at pthread_create.c:333
#15 0x00007f14abe7441d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 24 (LWP 20004):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225
#1  0x00007f14aeefbc2b in __gthread_cond_timedwait (__abs_timeout=0x7f146fffcdd0, __mutex=<optimized out>, __cond=0x7f14a7296f28) at /usr/include/x86_64-linux-gnu/c++/7/bits/gthr-default.h:871
#2  std::condition_variable::__wait_until_impl<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (__atime=..., __lock=..., this=<optimized out>) at /usr/include/c++/7/condition_variable:178
#3  std::condition_variable::wait_until<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (__atime=..., __lock=..., this=<optimized out>) at /usr/include/c++/7/condition_variable:106
#4  std::condition_variable::wait_for<long, std::ratio<1l, 1000000000l> > (__rtime=..., __lock=..., this=<optimized out>) at /usr/include/c++/7/condition_variable:143
#5  SyncObject::wait_for (nanoSecs=..., lock=..., this=<optimized out>) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/syncobject.h:53
#6  TaskQueue::_doSleep (this=this@entry=0x7f14a7296f00, t=..., lock=...) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/taskqueue.cc:98
#7  0x00007f14aeefd09f in TaskQueue::_sleepThenFetchNextTask (t=..., this=0x7f14a7296f00) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/taskqueue.cc:119
#8  TaskQueue::sleepThenFetchNextTask (this=this@entry=0x7f14a7296f00, thread=...) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/taskqueue.cc:158
#9  0x00007f14aee8ceb7 in ExecutorPool::_nextTask (this=0x7f14a71cc800, t=..., tick=tick@entry=27 '\033') at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/executorpool.cc:190
#10 0x00007f14aee8cf38 in ExecutorPool::nextTask (this=<optimized out>, t=..., tick=tick@entry=27 '\033') at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/executorpool.cc:204
#11 0x00007f14aee968d6 in ExecutorThread::run (this=0x7f14a72215e0) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/executorthread.cc:129
#12 0x00007f14ae26b3e7 in CouchbaseThread::run (this=0x7f14aa3ac750) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/platform/src/cb_pthreads.cc:58
#13 platform_thread_wrap (arg=0x7f14aa3ac750) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/platform/src/cb_pthreads.cc:71
#14 0x00007f14ac13e6ba in start_thread (arg=0x7f146ffff700) at pthread_create.c:333
#15 0x00007f14abe7441d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 23 (LWP 20003):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225
#1  0x00007f14aeefbc2b in __gthread_cond_timedwait (__abs_timeout=0x7f1478ff6dd0, __mutex=<optimized out>, __cond=0x7f14a7296f28) at /usr/include/x86_64-linux-gnu/c++/7/bits/gthr-default.h:871
#2  std::condition_variable::__wait_until_impl<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (__atime=..., __lock=..., this=<optimized out>) at /usr/include/c++/7/condition_variable:178
#3  std::condition_variable::wait_until<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (__atime=..., __lock=..., this=<optimized out>) at /usr/include/c++/7/condition_variable:106
#4  std::condition_variable::wait_for<long, std::ratio<1l, 1000000000l> > (__rtime=..., __lock=..., this=<optimized out>) at /usr/include/c++/7/condition_variable:143
#5  SyncObject::wait_for (nanoSecs=..., lock=..., this=<optimized out>) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/syncobject.h:53
#6  TaskQueue::_doSleep (this=this@entry=0x7f14a7296f00, t=..., lock=...) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/taskqueue.cc:98
#7  0x00007f14aeefd09f in TaskQueue::_sleepThenFetchNextTask (t=..., this=0x7f14a7296f00) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/taskqueue.cc:119
#8  TaskQueue::sleepThenFetchNextTask (this=this@entry=0x7f14a7296f00, thread=...) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/taskqueue.cc:158
#9  0x00007f14aee8ceb7 in ExecutorPool::_nextTask (this=0x7f14a71cc800, t=..., tick=tick@entry=78 'N') at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/executorpool.cc:190
#10 0x00007f14aee8cf38 in ExecutorPool::nextTask (this=<optimized out>, t=..., tick=tick@entry=78 'N') at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/executorpool.cc:204
#11 0x00007f14aee968d6 in ExecutorThread::run (this=0x7f14a7221500) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/executorthread.cc:129
#12 0x00007f14ae26b3e7 in CouchbaseThread::run (this=0x7f14aa3ac720) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/platform/src/cb_pthreads.cc:58
#13 platform_thread_wrap (arg=0x7f14aa3ac720) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/platform/src/cb_pthreads.cc:71
#14 0x00007f14ac13e6ba in start_thread (arg=0x7f1478ff9700) at pthread_create.c:333
#15 0x00007f14abe7441d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 22 (LWP 20002):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225
#1  0x00007f14aeefbc2b in __gthread_cond_timedwait (__abs_timeout=0x7f14797f7dd0, __mutex=<optimized out>, __cond=0x7f14a7296f28) at /usr/include/x86_64-linux-gnu/c++/7/bits/gthr-default.h:871
#2  std::condition_variable::__wait_until_impl<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (__atime=..., __lock=..., this=<optimized out>) at /usr/include/c++/7/condition_variable:178
#3  std::condition_variable::wait_until<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (__atime=..., __lock=..., this=<optimized out>) at /usr/include/c++/7/condition_variable:106
#4  std::condition_variable::wait_for<long, std::ratio<1l, 1000000000l> > (__rtime=..., __lock=..., this=<optimized out>) at /usr/include/c++/7/condition_variable:143
#5  SyncObject::wait_for (nanoSecs=..., lock=..., this=<optimized out>) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/syncobject.h:53
#6  TaskQueue::_doSleep (this=this@entry=0x7f14a7296f00, t=..., lock=...) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/taskqueue.cc:98
--Type <RET> for more, q to quit, c to continue without paging--
#7  0x00007f14aeefd09f in TaskQueue::_sleepThenFetchNextTask (t=..., this=0x7f14a7296f00) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/taskqueue.cc:119
#8  TaskQueue::sleepThenFetchNextTask (this=this@entry=0x7f14a7296f00, thread=...) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/taskqueue.cc:158
#9  0x00007f14aee8ceb7 in ExecutorPool::_nextTask (this=0x7f14a71cc800, t=..., tick=tick@entry=28 '\034') at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/executorpool.cc:190
#10 0x00007f14aee8cf38 in ExecutorPool::nextTask (this=<optimized out>, t=..., tick=tick@entry=28 '\034') at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/executorpool.cc:204
#11 0x00007f14aee968d6 in ExecutorThread::run (this=0x7f14a7221420) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/executorthread.cc:129
#12 0x00007f14ae26b3e7 in CouchbaseThread::run (this=0x7f14aa3ac6c0) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/platform/src/cb_pthreads.cc:58
#13 platform_thread_wrap (arg=0x7f14aa3ac6c0) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/platform/src/cb_pthreads.cc:71
#14 0x00007f14ac13e6ba in start_thread (arg=0x7f14797fa700) at pthread_create.c:333
#15 0x00007f14abe7441d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 21 (LWP 20001):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225
#1  0x00007f14aeefbc2b in __gthread_cond_timedwait (__abs_timeout=0x7f1479ff8dd0, __mutex=<optimized out>, __cond=0x7f14a72970a8) at /usr/include/x86_64-linux-gnu/c++/7/bits/gthr-default.h:871
#2  std::condition_variable::__wait_until_impl<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (__atime=..., __lock=..., this=<optimized out>) at /usr/include/c++/7/condition_variable:178
#3  std::condition_variable::wait_until<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (__atime=..., __lock=..., this=<optimized out>) at /usr/include/c++/7/condition_variable:106
#4  std::condition_variable::wait_for<long, std::ratio<1l, 1000000000l> > (__rtime=..., __lock=..., this=<optimized out>) at /usr/include/c++/7/condition_variable:143
#5  SyncObject::wait_for (nanoSecs=..., lock=..., this=<optimized out>) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/syncobject.h:53
#6  TaskQueue::_doSleep (this=this@entry=0x7f14a7297080, t=..., lock=...) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/taskqueue.cc:98
#7  0x00007f14aeefd09f in TaskQueue::_sleepThenFetchNextTask (t=..., this=0x7f14a7297080) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/taskqueue.cc:119
#8  TaskQueue::sleepThenFetchNextTask (this=this@entry=0x7f14a7297080, thread=...) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/taskqueue.cc:158
#9  0x00007f14aee8ceb7 in ExecutorPool::_nextTask (this=0x7f14a71cc800, t=..., tick=tick@entry=22 '\026') at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/executorpool.cc:190
#10 0x00007f14aee8cf38 in ExecutorPool::nextTask (this=<optimized out>, t=..., tick=tick@entry=22 '\026') at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/executorpool.cc:204
#11 0x00007f14aee968d6 in ExecutorThread::run (this=0x7f14a7221340) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/executorthread.cc:129
#12 0x00007f14ae26b3e7 in CouchbaseThread::run (this=0x7f14aa3ac690) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/platform/src/cb_pthreads.cc:58
#13 platform_thread_wrap (arg=0x7f14aa3ac690) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/platform/src/cb_pthreads.cc:71
#14 0x00007f14ac13e6ba in start_thread (arg=0x7f1479ffb700) at pthread_create.c:333
#15 0x00007f14abe7441d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 20 (LWP 20000):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225
#1  0x00007f14aeefbc2b in __gthread_cond_timedwait (__abs_timeout=0x7f147a7f9dd0, __mutex=<optimized out>, __cond=0x7f14a72970a8) at /usr/include/x86_64-linux-gnu/c++/7/bits/gthr-default.h:871
#2  std::condition_variable::__wait_until_impl<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (__atime=..., __lock=..., this=<optimized out>) at /usr/include/c++/7/condition_variable:178
#3  std::condition_variable::wait_until<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (__atime=..., __lock=..., this=<optimized out>) at /usr/include/c++/7/condition_variable:106
#4  std::condition_variable::wait_for<long, std::ratio<1l, 1000000000l> > (__rtime=..., __lock=..., this=<optimized out>) at /usr/include/c++/7/condition_variable:143
#5  SyncObject::wait_for (nanoSecs=..., lock=..., this=<optimized out>) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/syncobject.h:53
#6  TaskQueue::_doSleep (this=this@entry=0x7f14a7297080, t=..., lock=...) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/taskqueue.cc:98
#7  0x00007f14aeefd09f in TaskQueue::_sleepThenFetchNextTask (t=..., this=0x7f14a7297080) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/taskqueue.cc:119
#8  TaskQueue::sleepThenFetchNextTask (this=this@entry=0x7f14a7297080, thread=...) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/taskqueue.cc:158
#9  0x00007f14aee8ceb7 in ExecutorPool::_nextTask (this=0x7f14a71cc800, t=..., tick=tick@entry=9 '\t') at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/executorpool.cc:190
#10 0x00007f14aee8cf38 in ExecutorPool::nextTask (this=<optimized out>, t=..., tick=tick@entry=9 '\t') at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/executorpool.cc:204
#11 0x00007f14aee968d6 in ExecutorThread::run (this=0x7f14a7221260) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/executorthread.cc:129
#12 0x00007f14ae26b3e7 in CouchbaseThread::run (this=0x7f14aa3ac660) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/platform/src/cb_pthreads.cc:58
#13 platform_thread_wrap (arg=0x7f14aa3ac660) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/platform/src/cb_pthreads.cc:71
#14 0x00007f14ac13e6ba in start_thread (arg=0x7f147a7fc700) at pthread_create.c:333
#15 0x00007f14abe7441d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 19 (LWP 19999):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225
#1  0x00007f14aeefbc2b in __gthread_cond_timedwait (__abs_timeout=0x7f147affadd0, __mutex=<optimized out>, __cond=0x7f14a72970a8) at /usr/include/x86_64-linux-gnu/c++/7/bits/gthr-default.h:871
#2  std::condition_variable::__wait_until_impl<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (__atime=..., __lock=..., this=<optimized out>) at /usr/include/c++/7/condition_variable:178
#3  std::condition_variable::wait_until<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (__atime=..., __lock=..., this=<optimized out>) at /usr/include/c++/7/condition_variable:106
#4  std::condition_variable::wait_for<long, std::ratio<1l, 1000000000l> > (__rtime=..., __lock=..., this=<optimized out>) at /usr/include/c++/7/condition_variable:143
#5  SyncObject::wait_for (nanoSecs=..., lock=..., this=<optimized out>) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/syncobject.h:53
#6  TaskQueue::_doSleep (this=this@entry=0x7f14a7297080, t=..., lock=...) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/taskqueue.cc:98
#7  0x00007f14aeefd09f in TaskQueue::_sleepThenFetchNextTask (t=..., this=0x7f14a7297080) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/taskqueue.cc:119
#8  TaskQueue::sleepThenFetchNextTask (this=this@entry=0x7f14a7297080, thread=...) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/taskqueue.cc:158
#9  0x00007f14aee8ceb7 in ExecutorPool::_nextTask (this=0x7f14a71cc800, t=..., tick=tick@entry=9 '\t') at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/executorpool.cc:190
#10 0x00007f14aee8cf38 in ExecutorPool::nextTask (this=<optimized out>, t=..., tick=tick@entry=9 '\t') at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/executorpool.cc:204
#11 0x00007f14aee968d6 in ExecutorThread::run (this=0x7f14a7221180) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/executorthread.cc:129
#12 0x00007f14ae26b3e7 in CouchbaseThread::run (this=0x7f14aa3ac630) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/platform/src/cb_pthreads.cc:58
#13 platform_thread_wrap (arg=0x7f14aa3ac630) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/platform/src/cb_pthreads.cc:71
#14 0x00007f14ac13e6ba in start_thread (arg=0x7f147affd700) at pthread_create.c:333
#15 0x00007f14abe7441d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 18 (LWP 19998):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225
#1  0x00007f14aeefbc2b in __gthread_cond_timedwait (__abs_timeout=0x7f147b7fbdd0, __mutex=<optimized out>, __cond=0x7f14a72970a8) at /usr/include/x86_64-linux-gnu/c++/7/bits/gthr-default.h:871
#2  std::condition_variable::__wait_until_impl<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (__atime=..., __lock=..., this=<optimized out>) at /usr/include/c++/7/condition_variable:178
#3  std::condition_variable::wait_until<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (__atime=..., __lock=..., this=<optimized out>) at /usr/include/c++/7/condition_variable:106
#4  std::condition_variable::wait_for<long, std::ratio<1l, 1000000000l> > (__rtime=..., __lock=..., this=<optimized out>) at /usr/include/c++/7/condition_variable:143
#5  SyncObject::wait_for (nanoSecs=..., lock=..., this=<optimized out>) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/syncobject.h:53
#6  TaskQueue::_doSleep (this=this@entry=0x7f14a7297080, t=..., lock=...) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/taskqueue.cc:98
#7  0x00007f14aeefd09f in TaskQueue::_sleepThenFetchNextTask (t=..., this=0x7f14a7297080) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/taskqueue.cc:119
#8  TaskQueue::sleepThenFetchNextTask (this=this@entry=0x7f14a7297080, thread=...) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/taskqueue.cc:158
#9  0x00007f14aee8ceb7 in ExecutorPool::_nextTask (this=0x7f14a71cc800, t=..., tick=tick@entry=9 '\t') at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/executorpool.cc:190
#10 0x00007f14aee8cf38 in ExecutorPool::nextTask (this=<optimized out>, t=..., tick=tick@entry=9 '\t') at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/executorpool.cc:204
#11 0x00007f14aee968d6 in ExecutorThread::run (this=0x7f14a72210a0) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/executorthread.cc:129
#12 0x00007f14ae26b3e7 in CouchbaseThread::run (this=0x7f14aa3ac600) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/platform/src/cb_pthreads.cc:58
#13 platform_thread_wrap (arg=0x7f14aa3ac600) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/platform/src/cb_pthreads.cc:71
#14 0x00007f14ac13e6ba in start_thread (arg=0x7f147b7fe700) at pthread_create.c:333
#15 0x00007f14abe7441d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 17 (LWP 19997):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225
#1  0x00007f14aaa7ddd1 in background_thread_sleep (tsdn=<optimized out>, interval=10000000000, info=<optimized out>) at src/background_thread.c:255
#2  background_work_sleep_once (ind=<optimized out>, info=<optimized out>, tsdn=<optimized out>) at src/background_thread.c:307
#3  background_work (ind=<optimized out>, tsd=0x7f147bffd7c8) at src/background_thread.c:497
#4  background_thread_entry (ind_arg=<optimized out>) at src/background_thread.c:522
#5  0x00007f14ac13e6ba in start_thread (arg=0x7f147bfff700) at pthread_create.c:333
#6  0x00007f14abe7441d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 16 (LWP 19947):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f14ac93e1ec in std::condition_variable::wait(std::unique_lock<std::mutex>&) () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#2  0x00000000004a8dc1 in Executor::run (this=0x7f14a7145540) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/daemon/executor.cc:44
#3  0x00007f14ae2765bf in Couchbase::Thread::thread_entry (this=0x7f14a7145540) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/platform/src/thread.cc:45
#4  0x00007f14ae26b3e7 in CouchbaseThread::run (this=0x7f14a70acf70) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/platform/src/cb_pthreads.cc:58
#5  platform_thread_wrap (arg=0x7f14a70acf70) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/platform/src/cb_pthreads.cc:71
#6  0x00007f14ac13e6ba in start_thread (arg=0x7f14a3072700) at pthread_create.c:333
--Type <RET> for more, q to quit, c to continue without paging--
#7  0x00007f14abe7441d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 15 (LWP 19946):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f14ac93e1ec in std::condition_variable::wait(std::unique_lock<std::mutex>&) () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#2  0x00000000004a8dc1 in Executor::run (this=0x7f14a7145380) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/daemon/executor.cc:44
#3  0x00007f14ae2765bf in Couchbase::Thread::thread_entry (this=0x7f14a7145380) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/platform/src/thread.cc:45
#4  0x00007f14ae26b3e7 in CouchbaseThread::run (this=0x7f14a70acf40) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/platform/src/cb_pthreads.cc:58
#5  platform_thread_wrap (arg=0x7f14a70acf40) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/platform/src/cb_pthreads.cc:71
#6  0x00007f14ac13e6ba in start_thread (arg=0x7f14a3873700) at pthread_create.c:333
#7  0x00007f14abe7441d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 14 (LWP 19945):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f14ac93e1ec in std::condition_variable::wait(std::unique_lock<std::mutex>&) () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#2  0x00000000004a8dc1 in Executor::run (this=0x7f14a71451c0) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/daemon/executor.cc:44
#3  0x00007f14ae2765bf in Couchbase::Thread::thread_entry (this=0x7f14a71451c0) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/platform/src/thread.cc:45
#4  0x00007f14ae26b3e7 in CouchbaseThread::run (this=0x7f14a70acf10) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/platform/src/cb_pthreads.cc:58
#5  platform_thread_wrap (arg=0x7f14a70acf10) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/platform/src/cb_pthreads.cc:71
#6  0x00007f14ac13e6ba in start_thread (arg=0x7f14a4074700) at pthread_create.c:333
#7  0x00007f14abe7441d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 13 (LWP 19944):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f14ac93e1ec in std::condition_variable::wait(std::unique_lock<std::mutex>&) () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#2  0x00000000004a8dc1 in Executor::run (this=0x7f14a7145000) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/daemon/executor.cc:44
#3  0x00007f14ae2765bf in Couchbase::Thread::thread_entry (this=0x7f14a7145000) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/platform/src/thread.cc:45
#4  0x00007f14ae26b3e7 in CouchbaseThread::run (this=0x7f14a70acfa0) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/platform/src/cb_pthreads.cc:58
#5  platform_thread_wrap (arg=0x7f14a70acfa0) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/platform/src/cb_pthreads.cc:71
#6  0x00007f14ac13e6ba in start_thread (arg=0x7f14a4875700) at pthread_create.c:333
#7  0x00007f14abe7441d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 12 (LWP 19943):
#0  0x00007f14abe74a13 in epoll_wait () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f14ada21365 in epoll_dispatch (base=0x7f14aa3e4c00, tv=<optimized out>) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/epoll.c:465
#2  0x00007f14ada18306 in event_base_loop (base=0x7f14aa3e4c00, flags=flags@entry=0) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/event.c:1998
#3  0x00000000004720d9 in worker_libevent (arg=0x7f14a7086ff8) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/daemon/thread.cc:187
#4  0x00007f14ae26b3e7 in CouchbaseThread::run (this=0x7f14a70c91b0) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/platform/src/cb_pthreads.cc:58
#5  platform_thread_wrap (arg=0x7f14a70c91b0) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/platform/src/cb_pthreads.cc:71
#6  0x00007f14ac13e6ba in start_thread (arg=0x7f14a5076700) at pthread_create.c:333
#7  0x00007f14abe7441d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 11 (LWP 19942):
#0  0x00007f14abe74a13 in epoll_wait () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f14ada21365 in epoll_dispatch (base=0x7f14aa3e4900, tv=<optimized out>) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/epoll.c:465
#2  0x00007f14ada18306 in event_base_loop (base=0x7f14aa3e4900, flags=flags@entry=0) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/event.c:1998
#3  0x00000000004720d9 in worker_libevent (arg=0x7f14a7086550) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/daemon/thread.cc:187
#4  0x00007f14ae26b3e7 in CouchbaseThread::run (this=0x7f14a70c9000) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/platform/src/cb_pthreads.cc:58
#5  platform_thread_wrap (arg=0x7f14a70c9000) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/platform/src/cb_pthreads.cc:71
#6  0x00007f14ac13e6ba in start_thread (arg=0x7f14a5877700) at pthread_create.c:333
#7  0x00007f14abe7441d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 10 (LWP 19941):
#0  0x00007f14abe74a13 in epoll_wait () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f14ada21365 in epoll_dispatch (base=0x7f14aa3e4600, tv=<optimized out>) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/epoll.c:465
#2  0x00007f14ada18306 in event_base_loop (base=0x7f14aa3e4600, flags=flags@entry=0) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/event.c:1998
#3  0x00000000004720d9 in worker_libevent (arg=0x7f14a7085aa8) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/daemon/thread.cc:187
#4  0x00007f14ae26b3e7 in CouchbaseThread::run (this=0x7f14a70acd90) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/platform/src/cb_pthreads.cc:58
#5  platform_thread_wrap (arg=0x7f14a70acd90) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/platform/src/cb_pthreads.cc:71
#6  0x00007f14ac13e6ba in start_thread (arg=0x7f14a6078700) at pthread_create.c:333
#7  0x00007f14abe7441d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 9 (LWP 19940):
#0  0x00007f14abe74a13 in epoll_wait () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f14ada21365 in epoll_dispatch (base=0x7f14aa3e4300, tv=<optimized out>) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/epoll.c:465
#2  0x00007f14ada18306 in event_base_loop (base=0x7f14aa3e4300, flags=flags@entry=0) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/event.c:1998
#3  0x00000000004720d9 in worker_libevent (arg=0x7f14a7085000) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/daemon/thread.cc:187
#4  0x00007f14ae26b3e7 in CouchbaseThread::run (this=0x7f14a70c9060) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/platform/src/cb_pthreads.cc:58
#5  platform_thread_wrap (arg=0x7f14a70c9060) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/platform/src/cb_pthreads.cc:71
#6  0x00007f14ac13e6ba in start_thread (arg=0x7f14a6879700) at pthread_create.c:333
#7  0x00007f14abe7441d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 8 (LWP 19939):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225
#1  0x00000000004f2926 in __gthread_cond_timedwait (__abs_timeout=0x7f14a7078020, __mutex=<optimized out>, __cond=0x7f14aa3c03f8) at /usr/include/x86_64-linux-gnu/c++/7/bits/gthr-default.h:871
#2  std::condition_variable::__wait_until_impl<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (__atime=..., __lock=..., this=0x7f14aa3c03f8) at /usr/include/c++/7/condition_variable:178
#3  std::condition_variable::wait_until<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (__atime=..., __lock=..., this=0x7f14aa3c03f8) at /usr/include/c++/7/condition_variable:106
#4  std::condition_variable::wait_for<long, std::ratio<1l, 1l> > (__rtime=..., __lock=..., this=0x7f14aa3c03f8) at /usr/include/c++/7/condition_variable:143
#5  AuditImpl::consume_events (this=0x7f14aa3c0000) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/auditd/src/audit.cc:412
#6  0x00007f14ae26b3e7 in CouchbaseThread::run (this=0x7f14aa3ac180) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/platform/src/cb_pthreads.cc:58
#7  platform_thread_wrap (arg=0x7f14aa3ac180) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/platform/src/cb_pthreads.cc:71
#8  0x00007f14ac13e6ba in start_thread (arg=0x7f14a707a700) at pthread_create.c:333
#9  0x00007f14abe7441d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (LWP 19938):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225
#1  0x00000000004981b0 in __gthread_cond_timedwait (__abs_timeout=0x7f14a7b79000, __mutex=<optimized out>, __cond=0x7f14aa249378) at /usr/include/x86_64-linux-gnu/c++/7/bits/gthr-default.h:871
#2  std::condition_variable::__wait_until_impl<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (__atime=..., __lock=<synthetic pointer>..., this=0x7f14aa249378) at /usr/include/c++/7/condition_variable:178
#3  std::condition_variable::wait_until<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (__atime=..., __lock=<synthetic pointer>..., this=0x7f14aa249378) at /usr/include/c++/7/condition_variable:106
#4  std::condition_variable::wait_for<long, std::ratio<1l, 1000000000l> > (__rtime=<synthetic pointer>..., __lock=<synthetic pointer>..., this=0x7f14aa249378) at /usr/include/c++/7/condition_variable:143
#5  ExternalAuthManagerThread::run (this=0x7f14aa249280) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/daemon/external_auth_manager_thread.cc:229
#6  0x00007f14ae2765bf in Couchbase::Thread::thread_entry (this=0x7f14aa249280) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/platform/src/thread.cc:45
#7  0x00007f14ae26b3e7 in CouchbaseThread::run (this=0x7f14aa3ac6f0) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/platform/src/cb_pthreads.cc:58
#8  platform_thread_wrap (arg=0x7f14aa3ac6f0) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/platform/src/cb_pthreads.cc:71
#9  0x00007f14ac13e6ba in start_thread (arg=0x7f14a7b7b700) at pthread_create.c:333
#10 0x00007f14abe7441d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (LWP 19937):
#0  0x00007f14abe6874d in poll () at ../sysdeps/unix/syscall-template.S:84
--Type <RET> for more, q to quit, c to continue without paging--
#1  0x000000000047147e in poll (__timeout=60000, __nfds=1, __fds=0x7f14a8379ff8) at /usr/include/x86_64-linux-gnu/bits/poll2.h:46
#2  get_command (buffsize=80, buffer=0x7f14a837a000 "(U\356\347\376\177") at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/daemon/stdin_check.cc:49
#3  check_stdin_thread (arg=<optimized out>) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/daemon/stdin_check.cc:90
#4  0x00007f14ae26b3e7 in CouchbaseThread::run (this=0x7f14aa3ac090) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/platform/src/cb_pthreads.cc:58
#5  platform_thread_wrap (arg=0x7f14aa3ac090) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/platform/src/cb_pthreads.cc:71
#6  0x00007f14ac13e6ba in start_thread (arg=0x7f14a837c700) at pthread_create.c:333
#7  0x00007f14abe7441d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (LWP 19936):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225
#1  0x00007f14aeb270ea in __gthread_cond_timedwait (__abs_timeout=0x7f14a8b7b020, __mutex=<optimized out>, __cond=<optimized out>) at /usr/include/x86_64-linux-gnu/c++/7/bits/gthr-default.h:871
#2  std::condition_variable::__wait_until_impl<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (__atime=..., __lock=..., this=<optimized out>) at /usr/include/c++/7/condition_variable:178
#3  std::condition_variable::wait_until<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (__atime=..., __lock=..., this=<optimized out>) at /usr/include/c++/7/condition_variable:106
#4  std::condition_variable::wait_until<std::chrono::_V2::system_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> >, spdlog::details::periodic_worker::periodic_worker(std::function<void ()> const&, std::chrono::duration<long, std::ratio<1l, 1l> >)::{lambda()#1}::operator()() const::{lambda()#1}>(std::unique_lock<std::mutex>&, std::chrono::time_point<std::chrono::_V2::system_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > const&, spdlog::details::periodic_worker::periodic_worker(std::function<void ()> const&, std::chrono::duration<long, std::ratio<1l, 1l> >)::{lambda()#1}::operator()() const::{lambda()#1}) (__p=..., __atime=..., __lock=..., this=<optimized out>)
    at /usr/include/c++/7/condition_variable:129
#5  std::condition_variable::wait_for<long, std::ratio<1l, 1l>, spdlog::details::periodic_worker::periodic_worker(std::function<void ()> const&, std::chrono::duration<long, std::ratio<1l, 1l> >)::{lambda()#1}::operator()() const::{lambda()#1}>(std::unique_lock<std::mutex>&, std::chrono::duration<long, std::ratio<1l, 1l> > const&, spdlog::details::periodic_worker::periodic_worker(std::function<void ()> const&, std::chrono::duration<long, std::ratio<1l, 1l> >)::{lambda()#1}::operator()() const::{lambda()#1}) (__p=..., __rtime=..., __lock=..., this=<optimized out>) at /usr/include/c++/7/condition_variable:156
#6  spdlog::details::periodic_worker::periodic_worker(std::function<void ()> const&, std::chrono::duration<long, std::ratio<1l, 1l> >)::{lambda()#1}::operator()() const (__closure=0x7f14aa283d08) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/third_party/spdlog/include/spdlog/details/periodic_worker.h:38
#7  std::__invoke_impl<void, spdlog::details::periodic_worker::periodic_worker(std::function<void ()> const&, std::chrono::duration<long, std::ratio<1l, 1l> >)::{lambda()#1}>(std::__invoke_other, spdlog::details::periodic_worker::periodic_worker(std::function<void ()> const&, std::chrono::duration<long, std::ratio<1l, 1l> >)::{lambda()#1}&&) (__f=...)
    at /usr/include/c++/7/bits/invoke.h:60
#8  std::__invoke<spdlog::details::periodic_worker::periodic_worker(std::function<void ()> const&, std::chrono::duration<long, std::ratio<1l, 1l> >)::{lambda()#1}>(std::__invoke_result&&, (spdlog::details::periodic_worker::periodic_worker(std::function<void ()> const&, std::chrono::duration<long, std::ratio<1l, 1l> >)::{lambda()#1}&&)...) (__fn=...)
    at /usr/include/c++/7/bits/invoke.h:95
#9  std::thread::_Invoker<std::tuple<spdlog::details::periodic_worker::periodic_worker(std::function<void ()> const&, std::chrono::duration<long, std::ratio<1l, 1l> >)::{lambda()#1}> >::_M_invoke<0ul>(std::_Index_tuple<0ul>) (this=0x7f14aa283d08) at /usr/include/c++/7/thread:234
#10 std::thread::_Invoker<std::tuple<spdlog::details::periodic_worker::periodic_worker(std::function<void ()> const&, std::chrono::duration<long, std::ratio<1l, 1l> >)::{lambda()#1}> >::operator()() (this=0x7f14aa283d08) at /usr/include/c++/7/thread:243
#11 std::thread::_State_impl<std::thread::_Invoker<std::tuple<spdlog::details::periodic_worker::periodic_worker(std::function<void ()> const&, std::chrono::duration<long, std::ratio<1l, 1l> >)::{lambda()#1}> > >::_M_run() (this=0x7f14aa283d00) at /usr/include/c++/7/thread:186
#12 0x00007f14ac943b10 in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#13 0x00007f14ac13e6ba in start_thread (arg=0x7f14a8b7d700) at pthread_create.c:333
#14 0x00007f14abe7441d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (LWP 19935):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225
#1  0x00007f14aeb27aba in __gthread_cond_timedwait (__abs_timeout=0x7f14a937bca0, __mutex=<optimized out>, __cond=0x7f14aa25c438) at /usr/include/x86_64-linux-gnu/c++/7/bits/gthr-default.h:871
#2  std::condition_variable::__wait_until_impl<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (__atime=..., __lock=..., this=0x7f14aa25c438) at /usr/include/c++/7/condition_variable:178
#3  std::condition_variable::wait_until<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (__atime=..., __lock=..., this=0x7f14aa25c438) at /usr/include/c++/7/condition_variable:106
#4  std::condition_variable::wait_until<std::chrono::_V2::system_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> >, spdlog::details::mpmc_blocking_queue<spdlog::details::async_msg>::dequeue_for(spdlog::details::async_msg&, std::chrono::duration<long, std::ratio<1l, 1000l> >)::{lambda()#1}>(std::unique_lock<std::mutex>&, std::chrono::time_point<std::chrono::_V2::system_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > > const&, spdlog::details::mpmc_blocking_queue<spdlog::details::async_msg>::dequeue_for(spdlog::details::async_msg&, std::chrono::duration<long, std::ratio<1l, 1000l> >)::{lambda()#1}) (__p=..., __atime=..., __lock=..., this=0x7f14aa25c438)
    at /usr/include/c++/7/condition_variable:129
#5  std::condition_variable::wait_for<long, std::ratio<1l, 1000l>, spdlog::details::mpmc_blocking_queue<spdlog::details::async_msg>::dequeue_for(spdlog::details::async_msg&, std::chrono::duration<long, std::ratio<1l, 1000l> >)::{lambda()#1}>(std::unique_lock<std::mutex>&, std::chrono::duration<long, std::ratio<1l, 1000l> > const&, spdlog::details::mpmc_blocking_queue<spdlog::details::async_msg>::dequeue_for(spdlog::details::async_msg&, std::chrono::duration<long, std::ratio<1l, 1000l> >)::{lambda()#1}) (__p=..., __rtime=<synthetic pointer>..., __lock=..., this=0x7f14aa25c438) at /usr/include/c++/7/condition_variable:156
#6  spdlog::details::mpmc_blocking_queue<spdlog::details::async_msg>::dequeue_for (wait_duration=..., popped_item=..., this=0x7f14aa25c410) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/third_party/spdlog/include/spdlog/details/mpmc_blocking_q.h:61
#7  spdlog::details::thread_pool::process_next_msg_ (this=this@entry=0x7f14aa25c410) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/third_party/spdlog/include/spdlog/details/thread_pool.h:193
#8  0x00007f14aeb28040 in spdlog::details::thread_pool::worker_loop_ (this=0x7f14aa25c410) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/third_party/spdlog/include/spdlog/details/thread_pool.h:184
#9  0x00007f14ac943b10 in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#10 0x00007f14ac13e6ba in start_thread (arg=0x7f14a937e700) at pthread_create.c:333
#11 0x00007f14abe7441d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (LWP 19934):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225
#1  0x00007f14aaa7e527 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=0x7f14a9dfd7c8) at src/background_thread.c:452
#4  background_work (ind=<optimized out>, tsd=0x7f14a9dfd7c8) at src/background_thread.c:490
#5  background_thread_entry (ind_arg=<optimized out>) at src/background_thread.c:522
#6  0x00007f14ac13e6ba in start_thread (arg=0x7f14a9dff700) at pthread_create.c:333
#7  0x00007f14abe7441d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (LWP 19933):
#0  0x00007f14abe74a13 in epoll_wait () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f14ada21365 in epoll_dispatch (base=0x7f14aa3e4000, tv=<optimized out>) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/epoll.c:465
#2  0x00007f14ada18306 in event_base_loop (base=0x7f14aa3e4000, flags=flags@entry=0) at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/event.c:1998
#3  0x000000000042c74d in memcached_main (argc=<optimized out>, argv=<optimized out>) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/daemon/memcached.cc:1945
#4  0x00007f14abd8d830 in __libc_start_main (main=0x41fd90 <main(int, char**)>, argc=3, argv=0x7ffee7ee57f8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffee7ee57e8) at ../csu/libc-start.c:291
#5  0x00000000004230e9 in _start ()

Thread 1 (LWP 20005):
#0  0x00007f14abda2428 in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:54
#1  0x00007f14abda402a in __GI_abort () at abort.c:89
#2  0x00007f14ac90cdde in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#3  0x000000000055b002 in backtrace_terminate_handler () at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/utilities/terminate_handler.cc:86
#4  0x00007f14ac918896 in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#5  0x00007f14ac918901 in std::terminate() () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#6  0x00007f14ac918b55 in __cxa_throw () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#7  0x00007f14aeda4567 in cb::ThrowExceptionUnderflowPolicy<unsigned long>::underflow (this=<optimized out>, desired=<optimized out>, current=<optimized out>, arg=<optimized out>) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/platform/include/platform/non_negative_counter.h:48
#8  0x00007f14aef88108 in cb::NonNegativeCounter<unsigned long, cb::ThrowExceptionUnderflowPolicy>::fetch_add (arg=-1, this=<optimized out>) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/platform/include/platform/non_negative_counter.h:125
#9  cb::NonNegativeCounter<unsigned long, cb::ThrowExceptionUnderflowPolicy>::operator+= (rhs=18446744073709551615, this=<optimized out>) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/platform/include/platform/non_negative_counter.h:182
#10 Collections::VB::ManifestEntry::updateDiskSize (delta=-1, this=<optimized out>) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/collections/vbucket_manifest_entry.h:107
#11 Collections::VB::Manifest::updateDiskSize (delta=-1, entry=..., this=<optimized out>) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/collections/vbucket_manifest.h:1055
#12 Collections::VB::Manifest::CachingReadHandle::updateDiskSize (delta=-1, this=0x7f146f7fafc0) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/collections/vbucket_manifest.h:393
#13 Collections::VB::Flush::updateDiskSize (this=<optimized out>, key=..., delta=-1) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/collections/flush.cc:58
#14 0x00007f14aef5617a in saveDocsCallback (oldInfo=0x7f14a01a9940, newInfo=0x7f146cc71680, context=0x7f146f7fb7a0) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/couch-kvstore/couch-kvstore.cc:2111
#15 0x00007f14abb1a6ab in do_save_callback (valueNew=<optimized out>, valueOld=0x7f146f7fb180, key=0x7f14a02305a0, rq=0x7f146f7fb360) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/couchstore/src/btree_modify.cc:431
#16 modify_node (rq=rq@entry=0x7f146f7fb360, nptr=nptr@entry=0x7f146ca68f00, start=start@entry=0, end=1, dst=dst@entry=0x7f14a0335010) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/couchstore/src/btree_modify.cc:537
#17 0x00007f14abb1b019 in modify_btree (rq=rq@entry=0x7f146f7fb360, root=0x7f146ca68f00, errcode=errcode@entry=0x7f146f7fb294) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/couchstore/src/btree_modify.cc:809
#18 0x00007f14abb301cc in update_indexes (save_callback_ctx=<optimized out>, save_callback=<optimized out>, numdocs=<optimized out>, idvals=<optimized out>, ids=<optimized out>, seqvals=<optimized out>, seqs=0x7f14a0230590, db=<optimized out>, this=<optimized out>, this=<optimized out>)
    at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/couchstore/src/couch_save.cc:238
#19 couchstore_save_documents_and_callback (db=<optimized out>, docs=<optimized out>, infos=<optimized out>, numdocs=<optimized out>, options=options@entry=3, save_cb=save_cb@entry=0x7f14aef56040 <saveDocsCallback(DocInfo const*, DocInfo const*, void*)>, save_cb_ctx=<optimized out>)
    at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/couchstore/src/couch_save.cc:424
#20 0x00007f14aef624d0 in CouchKVStore::saveDocs (this=this@entry=0x7f14a04b4000, vbid=..., docs=std::vector of length 1, capacity 1 = {...}, docinfos=std::vector of length 1, capacity 1 = {...}, kvctx=...) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/couch-kvstore/couch-kvstore.cc:2161
#21 0x00007f14aef63423 in CouchKVStore::commit2couchstore (this=0x7f14a04b4000, commitData=...) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/couch-kvstore/couch-kvstore.cc:2016
#22 0x00007f14aef63ac5 in CouchKVStore::commit (this=0x7f14a04b4000, commitData=...) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/couch-kvstore/couch-kvstore.cc:1295
#23 0x00007f14aee3f9c2 in EPBucket::commit (this=this@entry=0x7f14a04a0000, vbid=..., kvstore=..., commitData=...) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/ep_bucket.cc:875
#24 0x00007f14aee4372a in EPBucket::flushVBucket (this=0x7f14a04a0000, vbid=...) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/ep_bucket.cc:744
#25 0x00007f14aee9c4bc in Flusher::flushVB (this=this@entry=0x7f14a04ed700) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/flusher.cc:306
#26 0x00007f14aee9d7c1 in Flusher::step (this=0x7f14a04ed700, task=0x7f14a0457110) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/flusher.cc:207
#27 0x00007f14aeea0a41 in GlobalTask::execute (this=0x7f14a0457110) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/globaltask.cc:73
#28 0x00007f14aee96a4f in ExecutorThread::run (this=0x7f14a72216c0) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/kv_engine/engines/ep/src/executorthread.cc:188
#29 0x00007f14ae26b3e7 in CouchbaseThread::run (this=0x7f14aa3ac780) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/platform/src/cb_pthreads.cc:58
#30 platform_thread_wrap (arg=0x7f14aa3ac780) at /home/couchbase/jenkins/workspace/kv-engine-jepsen-post-commit/platform/src/cb_pthreads.cc:71
--Type <RET> for more, q to quit, c to continue without paging--
#31 0x00007f14ac13e6ba in start_thread (arg=0x7f146f7fe700) at pthread_create.c:333
#32 0x00007f14abe7441d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109