couchbase_2_0_1

GNU gdb (Ubuntu/Linaro 7.4-2012.04-0ubuntu2.1) 7.4-2012.04
Copyright (C) 2012 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
For bug reporting instructions, please see:
<http://bugs.launchpad.net/gdb-linaro/>.
Attaching to process 21013
Reading symbols from /opt/couchbase/bin/memcached...done.
Reading symbols from /opt/couchbase/lib/memcached/libmemcached_utilities.so.0...done.
Loaded symbols for /opt/couchbase/lib/memcached/libmemcached_utilities.so.0
Reading symbols from /opt/couchbase/lib/libevent-2.0.so.5...done.
Loaded symbols for /opt/couchbase/lib/libevent-2.0.so.5
Reading symbols from /lib/x86_64-linux-gnu/libdl.so.2...(no debugging symbols found)...done.
Loaded symbols for /lib/x86_64-linux-gnu/libdl.so.2
Reading symbols from /lib/x86_64-linux-gnu/libm.so.6...(no debugging symbols found)...done.
Loaded symbols for /lib/x86_64-linux-gnu/libm.so.6
Reading symbols from /lib/x86_64-linux-gnu/librt.so.1...(no debugging symbols found)...done.
Loaded symbols for /lib/x86_64-linux-gnu/librt.so.1
Reading symbols from /opt/couchbase/lib/libtcmalloc_minimal.so.4...done.
Loaded symbols for /opt/couchbase/lib/libtcmalloc_minimal.so.4
Reading symbols from /lib/x86_64-linux-gnu/libpthread.so.0...(no debugging symbols found)...done.
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7f5f55b53700 (LWP 21075)]
[New Thread 0x7f5f56354700 (LWP 21074)]
[New Thread 0x7f5f56b55700 (LWP 21073)]
[New Thread 0x7f5f57356700 (LWP 21072)]
[New Thread 0x7f5f57b57700 (LWP 21071)]
[New Thread 0x7f5f58565700 (LWP 21070)]
[New Thread 0x7f5f59478700 (LWP 21042)]
[New Thread 0x7f5f59c79700 (LWP 21041)]
[New Thread 0x7f5f5a47a700 (LWP 21040)]
[New Thread 0x7f5f5ac7b700 (LWP 21039)]
[New Thread 0x7f5f5b47c700 (LWP 21038)]
[New Thread 0x7f5f5be8a700 (LWP 21032)]
[New Thread 0x7f5f5caa6700 (LWP 21031)]
Loaded symbols for /lib/x86_64-linux-gnu/libpthread.so.0
Reading symbols from /lib/x86_64-linux-gnu/libc.so.6...(no debugging symbols found)...done.
Loaded symbols for /lib/x86_64-linux-gnu/libc.so.6
Reading symbols from /lib64/ld-linux-x86-64.so.2...(no debugging symbols found)...done.
Loaded symbols for /lib64/ld-linux-x86-64.so.2
Reading symbols from /usr/lib/x86_64-linux-gnu/libstdc++.so.6...(no debugging symbols found)...done.
Loaded symbols for /usr/lib/x86_64-linux-gnu/libstdc++.so.6
Reading symbols from /lib/x86_64-linux-gnu/libgcc_s.so.1...(no debugging symbols found)...done.
Loaded symbols for /lib/x86_64-linux-gnu/libgcc_s.so.1
Reading symbols from /opt/couchbase/lib/memcached/stdin_term_handler.so...done.
Loaded symbols for /opt/couchbase/lib/memcached/stdin_term_handler.so
Reading symbols from /opt/couchbase/lib/memcached/file_logger.so...done.
Loaded symbols for /opt/couchbase/lib/memcached/file_logger.so
Reading symbols from /lib/x86_64-linux-gnu/libz.so.1...(no debugging symbols found)...done.
Loaded symbols for /lib/x86_64-linux-gnu/libz.so.1
Reading symbols from /opt/couchbase/lib/memcached/bucket_engine.so...done.
Loaded symbols for /opt/couchbase/lib/memcached/bucket_engine.so
Reading symbols from /opt/couchbase/lib/memcached/ep.so...done.
Loaded symbols for /opt/couchbase/lib/memcached/ep.so
Reading symbols from /opt/couchbase/lib/libcouchstore.so.1...done.
Loaded symbols for /opt/couchbase/lib/libcouchstore.so.1
Reading symbols from /opt/couchbase/lib/libsnappy.so.1...done.
Loaded symbols for /opt/couchbase/lib/libsnappy.so.1
Reading symbols from /lib/x86_64-linux-gnu/libnss_files.so.2...(no debugging symbols found)...done.
Loaded symbols for /lib/x86_64-linux-gnu/libnss_files.so.2
0x00007f5f5d2b4353 in epoll_wait () from /lib/x86_64-linux-gnu/libc.so.6
(gdb) set pagination off
(gdb) thread apply all bt

Thread 14 (Thread 0x7f5f5caa6700 (LWP 21031)):
#0  0x00007f5f5d2a68bd in read () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x00007f5f5d23aff8 in _IO_file_underflow () from /lib/x86_64-linux-gnu/libc.so.6
#2  0x00007f5f5d23c03e in _IO_default_uflow () from /lib/x86_64-linux-gnu/libc.so.6
#3  0x00007f5f5d23018a in _IO_getline_info () from /lib/x86_64-linux-gnu/libc.so.6
#4  0x00007f5f5d22f06b in fgets () from /lib/x86_64-linux-gnu/libc.so.6
#5  0x00007f5f5caa7b19 in fgets (__stream=<optimized out>, __n=<optimized out>, __s=<optimized out>) at /usr/include/bits/stdio2.h:255
#6  check_stdin_thread (arg=<optimized out>) at extensions/daemon/stdin_check.c:37
#7  0x00007f5f5d586e9a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#8  0x00007f5f5d2b3cbd in clone () from /lib/x86_64-linux-gnu/libc.so.6
#9  0x0000000000000000 in ?? ()

Thread 13 (Thread 0x7f5f5be8a700 (LWP 21032)):
#0  0x00007f5f5d58b0fe in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/x86_64-linux-gnu/libpthread.so.0
#1  0x00007f5f5c0a4176 in logger_thead_main (arg=<optimized out>) at extensions/loggers/file_logger.c:368
#2  0x00007f5f5d586e9a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#3  0x00007f5f5d2b3cbd in clone () from /lib/x86_64-linux-gnu/libc.so.6
#4  0x0000000000000000 in ?? ()

Thread 12 (Thread 0x7f5f5b47c700 (LWP 21038)):
#0  0x00007f5f5d2b4353 in epoll_wait () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x00007f5f5e114f36 in epoll_dispatch (base=0x5666500, tv=<optimized out>) at epoll.c:404
#2  0x00007f5f5e100394 in event_base_loop (base=0x5666500, flags=<optimized out>) at event.c:1558
#3  0x0000000000414b94 in worker_libevent (arg=0xdfd400) at daemon/thread.c:301
#4  0x00007f5f5d586e9a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f5f5d2b3cbd in clone () from /lib/x86_64-linux-gnu/libc.so.6
#6  0x0000000000000000 in ?? ()

Thread 11 (Thread 0x7f5f5ac7b700 (LWP 21039)):
#0  0x00007f5f5d2b4353 in epoll_wait () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x00007f5f5e114f36 in epoll_dispatch (base=0x5666280, tv=<optimized out>) at epoll.c:404
#2  0x00007f5f5e100394 in event_base_loop (base=0x5666280, flags=<optimized out>) at event.c:1558
#3  0x0000000000414b94 in worker_libevent (arg=0xdfd4f8) at daemon/thread.c:301
#4  0x00007f5f5d586e9a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f5f5d2b3cbd in clone () from /lib/x86_64-linux-gnu/libc.so.6
#6  0x0000000000000000 in ?? ()

Thread 10 (Thread 0x7f5f5a47a700 (LWP 21040)):
#0  0x00007f5f5d2b4353 in epoll_wait () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x00007f5f5e114f36 in epoll_dispatch (base=0x5666c80, tv=<optimized out>) at epoll.c:404
#2  0x00007f5f5e100394 in event_base_loop (base=0x5666c80, flags=<optimized out>) at event.c:1558
#3  0x0000000000414b94 in worker_libevent (arg=0xdfd5f0) at daemon/thread.c:301
#4  0x00007f5f5d586e9a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f5f5d2b3cbd in clone () from /lib/x86_64-linux-gnu/libc.so.6
#6  0x0000000000000000 in ?? ()

Thread 9 (Thread 0x7f5f59c79700 (LWP 21041)):
#0  0x00007f5f5d2b4353 in epoll_wait () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x00007f5f5e114f36 in epoll_dispatch (base=0x5666a00, tv=<optimized out>) at epoll.c:404
#2  0x00007f5f5e100394 in event_base_loop (base=0x5666a00, flags=<optimized out>) at event.c:1558
#3  0x0000000000414b94 in worker_libevent (arg=0xdfd6e8) at daemon/thread.c:301
#4  0x00007f5f5d586e9a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f5f5d2b3cbd in clone () from /lib/x86_64-linux-gnu/libc.so.6
#6  0x0000000000000000 in ?? ()

Thread 8 (Thread 0x7f5f59478700 (LWP 21042)):
#0  0x00007f5f5d2b4353 in epoll_wait () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x00007f5f5e114f36 in epoll_dispatch (base=0x5666780, tv=<optimized out>) at epoll.c:404
#2  0x00007f5f5e100394 in event_base_loop (base=0x5666780, flags=<optimized out>) at event.c:1558
#3  0x0000000000414b94 in worker_libevent (arg=0xdfd7e0) at daemon/thread.c:301
#4  0x00007f5f5d586e9a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f5f5d2b3cbd in clone () from /lib/x86_64-linux-gnu/libc.so.6
#6  0x0000000000000000 in ?? ()

Thread 7 (Thread 0x7f5f58565700 (LWP 21070)):
#0  0x00007f5f5d27f83d in nanosleep () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x00007f5f5d2ad774 in usleep () from /lib/x86_64-linux-gnu/libc.so.6
#2  0x00007f5f589e4055 in updateStatsThread (arg=<optimized out>) at src/memory_tracker.cc:31
#3  0x00007f5f5d586e9a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x00007f5f5d2b3cbd in clone () from /lib/x86_64-linux-gnu/libc.so.6
#5  0x0000000000000000 in ?? ()

Thread 6 (Thread 0x7f5f57b57700 (LWP 21071)):
#0  0x00007f5f5d58e6c3 in pwrite64 () from /lib/x86_64-linux-gnu/libpthread.so.0
#1  0x00007f5f58777228 in couch_pwrite (handle=<optimized out>, buf=0x9c29c031, nbyte=91, offset=14725120) at src/os.c:56
#2  0x00007f5f58a29d10 in cfs_pwrite (h=0x1f37f840, buf=0x9c29c031, sz=91, off=14725120) at src/couch-kvstore/couch-fs-stats.cc:75
#3  0x00007f5f58775960 in flush_buffer (buf=<optimized out>) at src/iobuffer.c:106
#4  buffered_sync (handle=<optimized out>) at src/iobuffer.c:366
#5  0x00007f5f587727df in couchstore_commit (db=0x65dbbf80) at src/couch_db.c:194
#6  0x00007f5f58a1e457 in CouchKVStore::saveDocs (this=0x56d2000, vbid=576, rev=<optimized out>, docs=<optimized out>, docinfos=0xdf6888, docCount=<optimized out>) at src/couch-kvstore/couch-kvstore.cc:1570
#7  0x00007f5f58a1eba1 in CouchKVStore::commit2couchstore (this=0x56d2000) at src/couch-kvstore/couch-kvstore.cc:1492
#8  0x00007f5f58a1f06c in queueItem (req=0xa6ed15c0, this=<optimized out>) at src/couch-kvstore/couch-kvstore.cc:1625
#9  CouchKVStore::del (this=0x56d2000, itm=..., cb=...) at src/couch-kvstore/couch-kvstore.cc:510
#10 0x00007f5f589acac1 in EventuallyPersistentStore::flushOneDelOrSet (this=0x56b8480, qi=..., rejectQueue=..., vb=...) at src/ep.cc:2446
#11 0x00007f5f589b4f65 in EventuallyPersistentStore::flushOne (this=0x56b8480, queue=..., rejectQueue=..., vb=...) at src/ep.cc:2468
#12 0x00007f5f589b54a5 in EventuallyPersistentStore::flushVBQueue (this=0x56b8480, vb=..., vb_queue=..., vbid=<optimized out>, data_age=<optimized out>) at src/ep.cc:2022
#13 0x00007f5f589b66dc in EventuallyPersistentStore::flushOutgoingQueue (this=0x56b8480, flushQueue=0x56b8748, flushPhase=<optimized out>, nextVbid=<optimized out>) at src/ep.cc:1964
#14 0x00007f5f589dde7c in Flusher::doFlush (this=0x56d05a0) at src/flusher.cc:245
#15 0x00007f5f589ded05 in Flusher::step (this=0x32, d=..., tid=...) at src/flusher.cc:158
#16 0x00007f5f589a44da in Dispatcher::run (this=0x56b2a80) at src/dispatcher.cc:173
#17 0x00007f5f589a4ddb in launch_dispatcher_thread (arg=0x32) at src/dispatcher.cc:28
#18 0x00007f5f5d586e9a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#19 0x00007f5f5d2b3cbd in clone () from /lib/x86_64-linux-gnu/libc.so.6
#20 0x0000000000000000 in ?? ()

Thread 5 (Thread 0x7f5f57356700 (LWP 21072)):
#0  0x00007fffc28a598f in clock_gettime ()
#1  0x00007f5f5d9ea15d in clock_gettime () from /lib/x86_64-linux-gnu/librt.so.1
#2  0x00007f5f58a0d6f1 in gethrtime () at src/gethrtime.c:77
#3  0x00007f5f589a44ee in Dispatcher::run (this=0x56b3880) at src/dispatcher.cc:187
#4  0x00007f5f589a4ddb in launch_dispatcher_thread (arg=0x1) at src/dispatcher.cc:28
#5  0x00007f5f5d586e9a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x00007f5f5d2b3cbd in clone () from /lib/x86_64-linux-gnu/libc.so.6
#7  0x0000000000000000 in ?? ()

Thread 4 (Thread 0x7f5f56b55700 (LWP 21073)):
#0  0x00007f5f5d58b0fe in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/x86_64-linux-gnu/libpthread.so.0
#1  0x00007f5f589a1528 in wait (tv=..., this=<optimized out>) at src/syncobject.hh:58
#2  IdleTask::run (this=0xe02360, d=...) at src/dispatcher.cc:336
#3  0x00007f5f589a44da in Dispatcher::run (this=0x56b36c0) at src/dispatcher.cc:173
#4  0x00007f5f589a4ddb in launch_dispatcher_thread (arg=0x56b3714) at src/dispatcher.cc:28
#5  0x00007f5f5d586e9a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x00007f5f5d2b3cbd in clone () from /lib/x86_64-linux-gnu/libc.so.6
#7  0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7f5f56354700 (LWP 21074)):
#0  0x00007f5f5d58b0fe in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/x86_64-linux-gnu/libpthread.so.0
#1  0x00007f5f589a1528 in wait (tv=..., this=<optimized out>) at src/syncobject.hh:58
#2  IdleTask::run (this=0xe022d0, d=...) at src/dispatcher.cc:336
#3  0x00007f5f589a44da in Dispatcher::run (this=0x56b3500) at src/dispatcher.cc:173
#4  0x00007f5f589a4ddb in launch_dispatcher_thread (arg=0x56b3554) at src/dispatcher.cc:28
#5  0x00007f5f5d586e9a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x00007f5f5d2b3cbd in clone () from /lib/x86_64-linux-gnu/libc.so.6
#7  0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f5f55b53700 (LWP 21075)):
#0  0x00007f5f5d58b0fe in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/x86_64-linux-gnu/libpthread.so.0
#1  0x00007f5f589c27ef in wait (tv=..., this=<optimized out>) at src/syncobject.hh:58
#2  wait (secs=<optimized out>, this=<optimized out>) at src/syncobject.hh:74
#3  wait (previousCounter=<optimized out>, howlong=<optimized out>, this=<optimized out>) at src/tapconnmap.hh:169
#4  EventuallyPersistentEngine::notifyPendingConnections (this=0x56bc000) at src/ep_engine.cc:3423
#5  0x00007f5f589c28d3 in EvpNotifyPendingConns (arg=0x56bc000) at src/ep_engine.cc:1145
#6  0x00007f5f5d586e9a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#7  0x00007f5f5d2b3cbd in clone () from /lib/x86_64-linux-gnu/libc.so.6
#8  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f5f5e750740 (LWP 21013)):
#0  0x00007f5f5d2b4353 in epoll_wait () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x00007f5f5e114f36 in epoll_dispatch (base=0x5666000, tv=<optimized out>) at epoll.c:404
#2  0x00007f5f5e100394 in event_base_loop (base=0x5666000, flags=<optimized out>) at event.c:1558
#3  0x000000000040c2e1 in main (argc=<optimized out>, argv=<optimized out>) at daemon/memcached.c:7918
(gdb) continue
Continuing.
^C
Program received signal SIGINT, Interrupt.
0x00007f5f5d2b4353 in epoll_wait () from /lib/x86_64-linux-gnu/libc.so.6
(gdb) thread apply all bt

Thread 14 (Thread 0x7f5f5caa6700 (LWP 21031)):
#0  0x00007f5f5d2a68bd in read () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x00007f5f5d23aff8 in _IO_file_underflow () from /lib/x86_64-linux-gnu/libc.so.6
#2  0x00007f5f5d23c03e in _IO_default_uflow () from /lib/x86_64-linux-gnu/libc.so.6
#3  0x00007f5f5d23018a in _IO_getline_info () from /lib/x86_64-linux-gnu/libc.so.6
#4  0x00007f5f5d22f06b in fgets () from /lib/x86_64-linux-gnu/libc.so.6
#5  0x00007f5f5caa7b19 in fgets (__stream=<optimized out>, __n=<optimized out>, __s=<optimized out>) at /usr/include/bits/stdio2.h:255
#6  check_stdin_thread (arg=<optimized out>) at extensions/daemon/stdin_check.c:37
#7  0x00007f5f5d586e9a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#8  0x00007f5f5d2b3cbd in clone () from /lib/x86_64-linux-gnu/libc.so.6
#9  0x0000000000000000 in ?? ()

Thread 13 (Thread 0x7f5f5be8a700 (LWP 21032)):
#0  0x00007f5f5d58b0fe in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/x86_64-linux-gnu/libpthread.so.0
#1  0x00007f5f5c0a4176 in logger_thead_main (arg=<optimized out>) at extensions/loggers/file_logger.c:368
#2  0x00007f5f5d586e9a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#3  0x00007f5f5d2b3cbd in clone () from /lib/x86_64-linux-gnu/libc.so.6
#4  0x0000000000000000 in ?? ()

Thread 12 (Thread 0x7f5f5b47c700 (LWP 21038)):
#0  0x00007f5f5d2b4353 in epoll_wait () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x00007f5f5e114f36 in epoll_dispatch (base=0x5666500, tv=<optimized out>) at epoll.c:404
#2  0x00007f5f5e100394 in event_base_loop (base=0x5666500, flags=<optimized out>) at event.c:1558
#3  0x0000000000414b94 in worker_libevent (arg=0xdfd400) at daemon/thread.c:301
#4  0x00007f5f5d586e9a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f5f5d2b3cbd in clone () from /lib/x86_64-linux-gnu/libc.so.6
#6  0x0000000000000000 in ?? ()

Thread 11 (Thread 0x7f5f5ac7b700 (LWP 21039)):
#0  0x00007f5f5d2b4353 in epoll_wait () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x00007f5f5e114f36 in epoll_dispatch (base=0x5666280, tv=<optimized out>) at epoll.c:404
#2  0x00007f5f5e100394 in event_base_loop (base=0x5666280, flags=<optimized out>) at event.c:1558
#3  0x0000000000414b94 in worker_libevent (arg=0xdfd4f8) at daemon/thread.c:301
#4  0x00007f5f5d586e9a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f5f5d2b3cbd in clone () from /lib/x86_64-linux-gnu/libc.so.6
#6  0x0000000000000000 in ?? ()

Thread 10 (Thread 0x7f5f5a47a700 (LWP 21040)):
#0  0x00007f5f5d2b4353 in epoll_wait () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x00007f5f5e114f36 in epoll_dispatch (base=0x5666c80, tv=<optimized out>) at epoll.c:404
#2  0x00007f5f5e100394 in event_base_loop (base=0x5666c80, flags=<optimized out>) at event.c:1558
#3  0x0000000000414b94 in worker_libevent (arg=0xdfd5f0) at daemon/thread.c:301
#4  0x00007f5f5d586e9a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f5f5d2b3cbd in clone () from /lib/x86_64-linux-gnu/libc.so.6
#6  0x0000000000000000 in ?? ()

Thread 9 (Thread 0x7f5f59c79700 (LWP 21041)):
#0  0x00007f5f5d2b4353 in epoll_wait () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x00007f5f5e114f36 in epoll_dispatch (base=0x5666a00, tv=<optimized out>) at epoll.c:404
#2  0x00007f5f5e100394 in event_base_loop (base=0x5666a00, flags=<optimized out>) at event.c:1558
#3  0x0000000000414b94 in worker_libevent (arg=0xdfd6e8) at daemon/thread.c:301
#4  0x00007f5f5d586e9a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f5f5d2b3cbd in clone () from /lib/x86_64-linux-gnu/libc.so.6
#6  0x0000000000000000 in ?? ()

Thread 8 (Thread 0x7f5f59478700 (LWP 21042)):
#0  0x00007f5f5d2b4353 in epoll_wait () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x00007f5f5e114f36 in epoll_dispatch (base=0x5666780, tv=<optimized out>) at epoll.c:404
#2  0x00007f5f5e100394 in event_base_loop (base=0x5666780, flags=<optimized out>) at event.c:1558
#3  0x0000000000414b94 in worker_libevent (arg=0xdfd7e0) at daemon/thread.c:301
#4  0x00007f5f5d586e9a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#5  0x00007f5f5d2b3cbd in clone () from /lib/x86_64-linux-gnu/libc.so.6
#6  0x0000000000000000 in ?? ()

Thread 7 (Thread 0x7f5f58565700 (LWP 21070)):
#0  0x00007f5f5d27f83d in nanosleep () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x00007f5f5d2ad774 in usleep () from /lib/x86_64-linux-gnu/libc.so.6
#2  0x00007f5f589e4055 in updateStatsThread (arg=<optimized out>) at src/memory_tracker.cc:31
#3  0x00007f5f5d586e9a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x00007f5f5d2b3cbd in clone () from /lib/x86_64-linux-gnu/libc.so.6
#5  0x0000000000000000 in ?? ()

Thread 6 (Thread 0x7f5f57b57700 (LWP 21071)):
#0  0x00007f5f5d2ad25d in fdatasync () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x00007f5f587771cf in couch_sync (handle=<optimized out>) at src/os.c:117
#2  0x00007f5f58a29adf in cfs_sync (h=0xcbf88960) at src/couch-kvstore/couch-fs-stats.cc:86
#3  0x00007f5f587727df in couchstore_commit (db=0xf49204d0) at src/couch_db.c:194
#4  0x00007f5f58a1e457 in CouchKVStore::saveDocs (this=0x56d2000, vbid=35, rev=<optimized out>, docs=<optimized out>, docinfos=0xdf6458, docCount=<optimized out>) at src/couch-kvstore/couch-kvstore.cc:1570
#5  0x00007f5f58a1eba1 in CouchKVStore::commit2couchstore (this=0x56d2000) at src/couch-kvstore/couch-kvstore.cc:1492
#6  0x00007f5f58a1f06c in queueItem (req=0xb7fbf440, this=<optimized out>) at src/couch-kvstore/couch-kvstore.cc:1625
#7  CouchKVStore::del (this=0x56d2000, itm=..., cb=...) at src/couch-kvstore/couch-kvstore.cc:510
#8  0x00007f5f589acac1 in EventuallyPersistentStore::flushOneDelOrSet (this=0x56b8480, qi=..., rejectQueue=..., vb=...) at src/ep.cc:2446
#9  0x00007f5f589b4f65 in EventuallyPersistentStore::flushOne (this=0x56b8480, queue=..., rejectQueue=..., vb=...) at src/ep.cc:2468
#10 0x00007f5f589b54a5 in EventuallyPersistentStore::flushVBQueue (this=0x56b8480, vb=..., vb_queue=..., vbid=<optimized out>, data_age=<optimized out>) at src/ep.cc:2022
#11 0x00007f5f589b66dc in EventuallyPersistentStore::flushOutgoingQueue (this=0x56b8480, flushQueue=0x56b8748, flushPhase=<optimized out>, nextVbid=<optimized out>) at src/ep.cc:1964
#12 0x00007f5f589dde7c in Flusher::doFlush (this=0x56d05a0) at src/flusher.cc:245
#13 0x00007f5f589ded05 in Flusher::step (this=0x32, d=..., tid=...) at src/flusher.cc:158
#14 0x00007f5f589a44da in Dispatcher::run (this=0x56b2a80) at src/dispatcher.cc:173
#15 0x00007f5f589a4ddb in launch_dispatcher_thread (arg=0x32) at src/dispatcher.cc:28
#16 0x00007f5f5d586e9a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#17 0x00007f5f5d2b3cbd in clone () from /lib/x86_64-linux-gnu/libc.so.6
#18 0x0000000000000000 in ?? ()

Thread 5 (Thread 0x7f5f57356700 (LWP 21072)):
#0  SpinLock::acquire (this=0x56e35f0) at src/atomic.cc:32
#1  0x00007f5f58a06f85 in lock (this=<optimized out>) at src/atomic.hh:259
#2  SpinLockHolder (theLock=<optimized out>, this=<optimized out>) at src/atomic.hh:251
#3  gimme (this=<optimized out>) at src/atomic.hh:373
#4  RCPtr (other=..., this=<optimized out>) at src/atomic.hh:311
#5  VBucketMap::getBucket (this=0x56b8508, id=606) at src/vbucketmap.cc:32
#6  0x00007f5f58996363 in BgFetcher::run (this=0xe02240, tid=...) at src/bgfetcher.cc:107
#7  0x00007f5f589a44da in Dispatcher::run (this=0x56b3880) at src/dispatcher.cc:173
#8  0x00007f5f589a4ddb in launch_dispatcher_thread (arg=0x56e35f0) at src/dispatcher.cc:28
#9  0x00007f5f5d586e9a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#10 0x00007f5f5d2b3cbd in clone () from /lib/x86_64-linux-gnu/libc.so.6
#11 0x0000000000000000 in ?? ()

Thread 4 (Thread 0x7f5f56b55700 (LWP 21073)):
#0  0x00007f5f5d58b0fe in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/x86_64-linux-gnu/libpthread.so.0
#1  0x00007f5f589a1528 in wait (tv=..., this=<optimized out>) at src/syncobject.hh:58
#2  IdleTask::run (this=0xe02360, d=...) at src/dispatcher.cc:336
#3  0x00007f5f589a44da in Dispatcher::run (this=0x56b36c0) at src/dispatcher.cc:173
#4  0x00007f5f589a4ddb in launch_dispatcher_thread (arg=0x56b3714) at src/dispatcher.cc:28
#5  0x00007f5f5d586e9a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x00007f5f5d2b3cbd in clone () from /lib/x86_64-linux-gnu/libc.so.6
#7  0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7f5f56354700 (LWP 21074)):
#0  0x00007f5f5d58b0fe in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/x86_64-linux-gnu/libpthread.so.0
#1  0x00007f5f589a1528 in wait (tv=..., this=<optimized out>) at src/syncobject.hh:58
#2  IdleTask::run (this=0xe022d0, d=...) at src/dispatcher.cc:336
#3  0x00007f5f589a44da in Dispatcher::run (this=0x56b3500) at src/dispatcher.cc:173
#4  0x00007f5f589a4ddb in launch_dispatcher_thread (arg=0x56b3554) at src/dispatcher.cc:28
#5  0x00007f5f5d586e9a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x00007f5f5d2b3cbd in clone () from /lib/x86_64-linux-gnu/libc.so.6
#7  0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f5f55b53700 (LWP 21075)):
#0  0x00007f5f5d58b0fe in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/x86_64-linux-gnu/libpthread.so.0
#1  0x00007f5f589c27ef in wait (tv=..., this=<optimized out>) at src/syncobject.hh:58
#2  wait (secs=<optimized out>, this=<optimized out>) at src/syncobject.hh:74
#3  wait (previousCounter=<optimized out>, howlong=<optimized out>, this=<optimized out>) at src/tapconnmap.hh:169
#4  EventuallyPersistentEngine::notifyPendingConnections (this=0x56bc000) at src/ep_engine.cc:3423
#5  0x00007f5f589c28d3 in EvpNotifyPendingConns (arg=0x56bc000) at src/ep_engine.cc:1145
#6  0x00007f5f5d586e9a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#7  0x00007f5f5d2b3cbd in clone () from /lib/x86_64-linux-gnu/libc.so.6
#8  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f5f5e750740 (LWP 21013)):
#0  0x00007f5f5d2b4353 in epoll_wait () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x00007f5f5e114f36 in epoll_dispatch (base=0x5666000, tv=<optimized out>) at epoll.c:404
#2  0x00007f5f5e100394 in event_base_loop (base=0x5666000, flags=<optimized out>) at event.c:1558
#3  0x000000000040c2e1 in main (argc=<optimized out>, argv=<optimized out>) at daemon/memcached.c:7918