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 /lib64/libdl.so.2...(no debugging symbols found)...done.
Loaded symbols for /lib64/libdl.so.2
Reading symbols from /lib64/libm.so.6...(no debugging symbols found)...done.
Loaded symbols for /lib64/libm.so.6
Reading symbols from /lib64/librt.so.1...(no debugging symbols found)...done.
Loaded symbols for /lib64/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 /lib64/libpthread.so.0...(no debugging symbols found)...done.
[Thread debugging using libthread_db enabled]
[New Thread 0x45c8a940 (LWP 32287)]
[New Thread 0x40d36940 (LWP 32280)]
Loaded symbols for /lib64/libpthread.so.0
Reading symbols from /lib64/libc.so.6...(no debugging symbols found)...done.
Loaded symbols for /lib64/libc.so.6
Reading symbols from /lib64/ld-linux-x86-64.so.2...(no debugging symbols found)...done.
Loaded symbols for /lib64/ld-linux-x86-64.so.2
Reading symbols from /usr/lib64/libstdc++.so.6...(no debugging symbols found)...done.
Loaded symbols for /usr/lib64/libstdc++.so.6
Reading symbols from /lib64/libgcc_s.so.1...(no debugging symbols found)...done.
Loaded symbols for /lib64/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 /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 /lib64/libnss_files.so.2...(no debugging symbols found)...done.
Loaded symbols for /lib64/libnss_files.so.2

warning: no loadable sections found in added symbol-file system-supplied DSO at 0x7fff7acd8000
length (this=0x14619008, deactivate=<value optimized out>) at src/item.hh:78
78	src/item.hh: No such file or directory.
	in src/item.hh
(gdb) t a a bt

Thread 3 (Thread 0x40d36940 (LWP 32280)):
#0  0x000000386740b1c0 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00002aaaaaaae4d6 in logger_thead_main (arg=0xea78040) at extensions/loggers/file_logger.c:368
#2  0x000000386740677d in start_thread () from /lib64/libpthread.so.0
#3  0x0000003866cd325d in clone () from /lib64/libc.so.6

Thread 2 (Thread 0x45c8a940 (LWP 32287)):
#0  0x0000003866c99221 in nanosleep () from /lib64/libc.so.6
#1  0x0000003866cccba4 in usleep () from /lib64/libc.so.6
#2  0x00002aaaaaf302f5 in updateStatsThread (arg=0xea784c0) at src/memory_tracker.cc:31
#3  0x000000386740677d in start_thread () from /lib64/libpthread.so.0
#4  0x0000003866cd325d in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x2ab39b69b220 (LWP 32270)):
#0  length (this=0x14619008, deactivate=<value optimized out>) at src/item.hh:78
#1  size (this=0x14619008, deactivate=<value optimized out>) at src/stored-value.hh:514
#2  visit (this=0x14619008, deactivate=<value optimized out>) at src/stored-value.hh:837
#3  HashTable::clear (this=0x14619008, deactivate=<value optimized out>) at src/stored-value.cc:268
#4  0x00002aaaaaee241b in ~HashTable (this=0x14619000, __in_chrg=<value optimized out>) at src/stored-value.hh:975
#5  VBucket::~VBucket (this=0x14619000, __in_chrg=<value optimized out>) at src/vbucket.hh:140
#6  0x00002aaaaaf5282b in ~RCPtr (this=0x132d8508, __in_chrg=<value optimized out>) at src/atomic.hh:315
#7  VBucketMap::~VBucketMap (this=0x132d8508, __in_chrg=<value optimized out>) at src/vbucketmap.cc:23
#8  0x00002aaaaaf0308b in EventuallyPersistentStore::~EventuallyPersistentStore (this=0x132d8480, __in_chrg=<value optimized out>) at src/ep.cc:549
#9  0x00002aaaaaf2182f in EventuallyPersistentEngine::~EventuallyPersistentEngine() () from /opt/couchbase/lib/memcached/ep.so
#10 0x00002aaaaaf126f5 in EvpDestroy (handle=<value optimized out>, force=false) at src/ep_engine.cc:131
#11 0x00002aaaaacc1bb5 in bucket_shutdown_engine (key=<value optimized out>, nkey=<value optimized out>, val=0x132e62a0, nval=<value optimized out>, 
    args=<value optimized out>) at bucket_engine.c:1290
#12 0x00002aaaaacc866c in genhash_iter (h=0x132ea000, iterfunc=0x2aaaaacc1b80 <bucket_shutdown_engine>, arg=0x0) at genhash.c:275
#13 0x00002aaaaacc2f46 in bucket_destroy (handle=0x2aaaaaecb640, force=<value optimized out>) at bucket_engine.c:1327
#14 0x0000000000409777 in main (argc=<value optimized out>, argv=<value optimized out>) at daemon/memcached.c:7924