GNU gdb (GDB) Red Hat Enterprise Linux 7.6.1-120.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 99458] [New LWP 94900] [New LWP 94901] [New LWP 94909] [New LWP 94910] [New LWP 94911] [New LWP 94915] [New LWP 94916] [New LWP 94937] [New LWP 94938] [New LWP 94939] [New LWP 94940] [New LWP 94941] [New LWP 94942] [New LWP 94943] [New LWP 94944] [New LWP 94945] [New LWP 94946] [New LWP 94947] [New LWP 94948] [New LWP 94949] [New LWP 94950] [New LWP 94951] [New LWP 94952] [New LWP 94953] [New LWP 94954] [New LWP 94957] [New LWP 94959] [New LWP 94960] [New LWP 94961] [New LWP 94962] [New LWP 95453] [New LWP 95454] [New LWP 95455] [New LWP 95456] [New LWP 95457] [New LWP 95458] [New LWP 95459] [New LWP 95460] [New LWP 95461] [New LWP 95462] [New LWP 95463] [New LWP 95464] [New LWP 95465] [New LWP 95466] [New LWP 95467] [New LWP 95468] [New LWP 95469] [New LWP 95470] [New LWP 95471] [New LWP 95472] [New LWP 95473] [New LWP 95474] [New LWP 95485] [New LWP 99331] [New LWP 99336] [New LWP 99337] [New LWP 99457] [New LWP 99459] 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 __atomic_add (__val=1, __mem=0x235ca) at /opt/gcc-10.2.0/include/c++/10.2.0/ext/atomicity.h:96 Id Target Id Frame 59 LWP 99459 0x00007fb3560b6fc3 in pread64 () at ../sysdeps/unix/syscall-template.S:81 58 LWP 99457 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 57 LWP 99337 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 56 LWP 99336 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 55 LWP 99331 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 54 LWP 95485 pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238 53 LWP 95474 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 52 LWP 95473 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 51 LWP 95472 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 50 LWP 95471 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 49 LWP 95470 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 48 LWP 95469 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 47 LWP 95468 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 46 LWP 95467 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 45 LWP 95466 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 44 LWP 95465 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 43 LWP 95464 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 42 LWP 95463 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 41 LWP 95462 0x00000000008601b3 in MagmaKVStore::compactionCore(MagmaKVStore::MagmaCompactionCB&, magma::Slice const&, magma::Slice const&, magma::Slice const&, std::basic_string_view >) () at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/kvstore/magma-kvstore/magma-kvstore.cc:315 40 LWP 95461 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 39 LWP 95460 magma::MergeIterator::Valid (this=0x7fb2cdfe8ff0) at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/lsm/iterator.cc:78 38 LWP 95459 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 37 LWP 95458 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 36 LWP 95457 __atomic_add (__val=1, __mem=0x7fb2a1733d88) at /opt/gcc-10.2.0/include/c++/10.2.0/ext/atomicity.h:96 35 LWP 95456 __atomic_add (__val=1, __mem=0x7fb2872d9008) at /opt/gcc-10.2.0/include/c++/10.2.0/ext/atomicity.h:96 34 LWP 95455 __atomic_add (__val=1, __mem=0x7fb29be12348) at /opt/gcc-10.2.0/include/c++/10.2.0/ext/atomicity.h:96 33 LWP 95454 0x00000000009b02c6 in make_unique () at /home/couchbase/jenkins/workspace/couchbase-server-unix/magma/lsm/tree_snapshot.cc:58 32 LWP 95453 pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238 31 LWP 94962 0x00007fb3539f0eb3 in create_module () at ../sysdeps/unix/syscall-template.S:81 30 LWP 94961 0x00007fb3539eabf9 in closelog_internal () at ../misc/syslog.c:433 29 LWP 94960 __lll_lock_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135 28 LWP 94959 0x00007fb3539eabf9 in closelog_internal () at ../misc/syslog.c:433 27 LWP 94957 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 26 LWP 94954 0x00007fb3539eabf9 in closelog_internal () at ../misc/syslog.c:433 25 LWP 94953 0x00007fb3539eabf9 in closelog_internal () at ../misc/syslog.c:433 24 LWP 94952 0x00007fb3539eabf9 in closelog_internal () at ../misc/syslog.c:433 23 LWP 94951 0x00007fb3539eabf9 in closelog_internal () at ../misc/syslog.c:433 22 LWP 94950 0x00007fb3539eabf9 in closelog_internal () at ../misc/syslog.c:433 21 LWP 94949 0x00007fb3539eabf9 in closelog_internal () at ../misc/syslog.c:433 20 LWP 94948 0x00007fb3539eabf9 in closelog_internal () at ../misc/syslog.c:433 19 LWP 94947 0x00007fb3539eabf9 in closelog_internal () at ../misc/syslog.c:433 18 LWP 94946 0x00007fb3539f0eb3 in create_module () at ../sysdeps/unix/syscall-template.S:81 17 LWP 94945 0x00007fb3539f0eb3 in create_module () at ../sysdeps/unix/syscall-template.S:81 16 LWP 94944 0x00007fb3539f0eb3 in create_module () at ../sysdeps/unix/syscall-template.S:81 15 LWP 94943 0x00007fb3539f0eb3 in create_module () at ../sysdeps/unix/syscall-template.S:81 14 LWP 94942 0x00007fb3539f0eb3 in create_module () at ../sysdeps/unix/syscall-template.S:81 13 LWP 94941 0x00007fb3539f0eb3 in create_module () at ../sysdeps/unix/syscall-template.S:81 12 LWP 94940 0x00007fb3539f0eb3 in create_module () at ../sysdeps/unix/syscall-template.S:81 11 LWP 94939 0x00007fb3539e5c3d in fts_children (sp=0x2ce0608, instr=47047712) at fts.c:546 10 LWP 94938 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 9 LWP 94937 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 8 LWP 94916 pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238 7 LWP 94915 pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238 6 LWP 94911 0x00007fb3539e5c3d in fts_children (sp=0x1, instr=1953851507) at fts.c:546 5 LWP 94910 pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238 4 LWP 94909 pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238 3 LWP 94901 pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238 2 LWP 94900 0x00007fb3539f0eb3 in create_module () at ../sysdeps/unix/syscall-template.S:81 * 1 LWP 99458 __atomic_add (__val=1, __mem=0x235ca) at /opt/gcc-10.2.0/include/c++/10.2.0/ext/atomicity.h:96 No core file now.