GNU gdb (GDB) Red Hat Enterprise Linux 7.6.1-119.el7 Copyright (C) 2013 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later 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-redhat-linux-gnu". For bug reporting instructions, please see: ... Reading symbols from /opt/couchbase/bin/memcached...Reading symbols from /usr/lib/debug/opt/couchbase/bin/memcached.debug...done. done. [New LWP 37980] [New LWP 37948] [New LWP 37949] [New LWP 37950] [New LWP 37951] [New LWP 37952] [New LWP 37956] [New LWP 37957] [New LWP 37958] [New LWP 37959] [New LWP 37960] [New LWP 37961] [New LWP 37962] [New LWP 37963] [New LWP 37964] [New LWP 37965] [New LWP 37966] [New LWP 37967] [New LWP 37968] [New LWP 37969] [New LWP 37970] [New LWP 37971] [New LWP 37972] [New LWP 37973] [New LWP 37974] [New LWP 37975] [New LWP 37976] [New LWP 37977] [New LWP 37978] [New LWP 37979] [New LWP 37981] [New LWP 37982] [New LWP 37983] [New LWP 40784] [New LWP 40786] [New LWP 40787] [New LWP 40788] [New LWP 40789] [New LWP 40790] [New LWP 40791] [New LWP 40792] [New LWP 40793] [New LWP 40795] [New LWP 40796] [New LWP 40797] [New LWP 40798] [New LWP 40799] [New LWP 40800] [New LWP 40801] [New LWP 40802] [New LWP 40803] [New LWP 40804] [New LWP 40805] [New LWP 40806] [New LWP 40812] [New LWP 40817] To enable execution of this file add add-auto-load-safe-path /usr/lib64/libthread_db-1.0.so line to your configuration file "/root/.gdbinit". To completely disable this security protection add set auto-load safe-path / line to your configuration file "/root/.gdbinit". For more information about this security protection see the "Auto-loading safe path" section in the GDB manual. E.g., run from the shell: info "(gdb)Auto-loading safe path" Core was generated by `/opt/couchbase/bin/memcached -C /opt/couchbase/var/lib/couchbase/config/memcach'. #0 0x00007f66e420b387 in raise () from /lib64/libc.so.6 Id Target Id Frame 56 LWP 40817 0x00007f66e69aade2 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0 55 LWP 40812 0x00007f66e69aade2 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0 54 LWP 40806 0x00007f66e69aaa35 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0 53 LWP 40805 0x00007f66e69aaa35 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0 52 LWP 40804 0x00007f66e69aaa35 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0 51 LWP 40803 0x00007f66e69aaa35 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0 50 LWP 40802 0x00007f66e69aaa35 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0 49 LWP 40801 0x00007f66e69aaa35 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0 48 LWP 40800 0x00007f66e69aaa35 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0 47 LWP 40799 0x00007f66e69aaa35 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0 46 LWP 40798 0x00007f66e69aaa35 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0 45 LWP 40797 0x00007f66e69aaa35 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0 44 LWP 40796 0x00007f66e69aaa35 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0 43 LWP 40795 0x00007f66e69aaa35 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0 42 LWP 40793 0x00007f66e69aaa35 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0 41 LWP 40792 0x00007f66e69aaa35 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0 40 LWP 40791 0x00007f66e69aaa35 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0 39 LWP 40790 0x00007f66e69aaa35 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0 38 LWP 40789 0x00007f66e69aade2 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0 37 LWP 40788 0x00007f66e69aade2 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0 36 LWP 40787 0x00007f66e69aade2 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0 35 LWP 40786 0x00007f66e69aade2 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0 34 LWP 40784 0x00007f66e69aade2 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0 33 LWP 37983 0x00007f66e42d3eb3 in epoll_wait () from /lib64/libc.so.6 32 LWP 37982 0x00007f66e42cdbf9 in syscall () from /lib64/libc.so.6 31 LWP 37981 0x00007f66e42cdbf9 in syscall () from /lib64/libc.so.6 30 LWP 37979 0x0000000000a980f2 in counts_inc_normalised (value=1, index=, h=0x7f664f3d6680) at /home/couchbase/jenkins/workspace/couchbase-server-unix/third_party/HdrHistogram_c/src/hdr_histogram.c:77 29 LWP 37978 0x00007ffea95ae6c2 in ?? () 28 LWP 37977 __atomic_add (__val=1, __mem=0x7f66500ed608) at /opt/gcc-10.2.0/include/c++/10.2.0/ext/atomicity.h:96 27 LWP 37976 0x0000000000809efb in basic_json (other=, this=0x7f664d465040) at /opt/gcc-10.2.0/include/c++/10.2.0/bits/stl_uninitialized.h:90 26 LWP 37975 0x00007f66e42cdbf9 in syscall () from /lib64/libc.so.6 25 LWP 37974 0x00007f66e42cdbf9 in syscall () from /lib64/libc.so.6 24 LWP 37973 0x00007f66e42cdbf9 in syscall () from /lib64/libc.so.6 23 LWP 37972 0x00007f66e42cdbf9 in syscall () from /lib64/libc.so.6 22 LWP 37971 0x00007f66e42cdbf9 in syscall () from /lib64/libc.so.6 21 LWP 37970 0x00007f66e42cdbf9 in syscall () from /lib64/libc.so.6 20 LWP 37969 0x00007f66e42cdbf9 in syscall () from /lib64/libc.so.6 19 LWP 37968 0x00007f66e42cdbf9 in syscall () from /lib64/libc.so.6 18 LWP 37967 0x00007f66e69ad54d in __lll_lock_wait () from /lib64/libpthread.so.0 17 LWP 37966 0x00007f66e5ee0455 in je_extent_heap_remove_first (ph=ph@entry=0x7f664b208530) at src/extent.c:283 16 LWP 37965 0x00007f66e69a8da4 in pthread_mutex_lock () from /lib64/libpthread.so.0 15 LWP 37964 0x00007f66e69a8d5d in pthread_mutex_lock () from /lib64/libpthread.so.0 14 LWP 37963 __atomic_add (__val=1, __mem=0x7f6653b8d268) at /opt/gcc-10.2.0/include/c++/10.2.0/ext/atomicity.h:96 13 LWP 37962 0x00007f66e42d3eb3 in epoll_wait () from /lib64/libc.so.6 12 LWP 37961 0x000000000059dbc9 in Timings::get_or_create_timing_histogram(unsigned char) () at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/timings.cc:149 11 LWP 37960 0x00007f66e42c8c3d in poll () from /lib64/libc.so.6 10 LWP 37959 0x00007f66e69aaa35 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0 9 LWP 37958 0x00007f66e69aaa35 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0 8 LWP 37957 0x00007f66e69aade2 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0 7 LWP 37956 0x00007f66e69aade2 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0 6 LWP 37952 0x00007f66e42c8c3d in poll () from /lib64/libc.so.6 5 LWP 37951 0x00007f66e69aade2 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0 4 LWP 37950 0x00007f66e69aade2 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0 3 LWP 37949 0x00007f66e69aade2 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0 2 LWP 37948 0x00007f66e42d3eb3 in epoll_wait () from /lib64/libc.so.6 * 1 LWP 37980 0x00007f66e420b387 in raise () from /lib64/libc.so.6 No core file now.