GNU gdb (GDB) Red Hat Enterprise Linux 7.6.1-114.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 10119] [New LWP 9893] [New LWP 9894] [New LWP 9895] [New LWP 9896] [New LWP 9897] [New LWP 9898] [New LWP 9899] [New LWP 9900] [New LWP 9901] [New LWP 9902] [New LWP 9903] [New LWP 9904] [New LWP 9905] [New LWP 9906] [New LWP 9907] [New LWP 9908] [New LWP 9909] [New LWP 9910] [New LWP 10117] [New LWP 10118] [New LWP 10120] [New LWP 10121] [New LWP 10122] [New LWP 10123] [New LWP 10124] [New LWP 10125] [New LWP 10126] [New LWP 10127] [New LWP 10128] [New LWP 10129] [New LWP 10136] 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 0x00007f51691a3387 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:55 55 return INLINE_SYSCALL (tgkill, 3, pid, selftid, sig); Id Target Id Frame 32 LWP 10136 pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238 31 LWP 10129 0x00007f516926beb3 in epoll_wait () at ../sysdeps/unix/syscall-template.S:81 30 LWP 10128 __atomic_add (__val=1, __mem=0x7f511457bf08) at /usr/local/include/c++/7.3.0/ext/atomicity.h:53 29 LWP 10127 __atomic_add (__val=1, __mem=0x7f50e9b61188) at /usr/local/include/c++/7.3.0/ext/atomicity.h:53 28 LWP 10126 syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38 27 LWP 10125 syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38 26 LWP 10124 syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38 25 LWP 10123 syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38 24 LWP 10122 syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38 23 LWP 10121 syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38 22 LWP 10120 syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38 21 LWP 10118 syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38 20 LWP 10117 pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238 19 LWP 9910 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 18 LWP 9909 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 17 LWP 9908 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 16 LWP 9907 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 15 LWP 9906 0x00007f516926beb3 in epoll_wait () at ../sysdeps/unix/syscall-template.S:81 14 LWP 9905 0x00007f516926beb3 in epoll_wait () at ../sysdeps/unix/syscall-template.S:81 13 LWP 9904 0x00007f516926beb3 in epoll_wait () at ../sysdeps/unix/syscall-template.S:81 12 LWP 9903 0x00007f516926beb3 in epoll_wait () at ../sysdeps/unix/syscall-template.S:81 11 LWP 9902 pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238 10 LWP 9901 pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238 9 LWP 9900 0x00007f5169260c3d in poll () at ../sysdeps/unix/syscall-template.S:81 8 LWP 9899 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 7 LWP 9898 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 6 LWP 9897 0x00007f5169260c3d in poll () at ../sysdeps/unix/syscall-template.S:81 5 LWP 9896 pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238 4 LWP 9895 pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238 3 LWP 9894 pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238 2 LWP 9893 0x00007f516926beb3 in epoll_wait () at ../sysdeps/unix/syscall-template.S:81 * 1 LWP 10119 0x00007f51691a3387 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:55 No core file now.