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-7.2.0-5067.x86_64.debug...done. done. [New LWP 66304] [New LWP 66253] [New LWP 66254] [New LWP 66264] [New LWP 66265] [New LWP 66266] [New LWP 66270] [New LWP 66273] [New LWP 66285] [New LWP 66286] [New LWP 66287] [New LWP 66288] [New LWP 66289] [New LWP 66290] [New LWP 66291] [New LWP 66292] [New LWP 66293] [New LWP 66294] [New LWP 66295] [New LWP 66296] [New LWP 66297] [New LWP 66298] [New LWP 66299] [New LWP 66300] [New LWP 66301] [New LWP 66302] [New LWP 66306] [New LWP 66307] [New LWP 66308] [New LWP 66309] [New LWP 66310] [New LWP 66311] [New LWP 66312] [New LWP 66313] [New LWP 66314] [New LWP 66315] [New LWP 66316] [New LWP 66317] [New LWP 66482] [New LWP 66483] [New LWP 66484] [New LWP 66485] [New LWP 66486] [New LWP 66487] [New LWP 66488] [New LWP 66489] [New LWP 66490] [New LWP 66491] [New LWP 66492] [New LWP 66493] [New LWP 66494] [New LWP 66495] [New LWP 66496] [New LWP 66497] [New LWP 66498] [New LWP 66499] [New LWP 66500] [New LWP 66501] [New LWP 66502] [New LWP 66583] [New LWP 66584] 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 0x00007fdf19e65387 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 61 LWP 66584 __lll_lock_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135 60 LWP 66583 0x0000000000884d65 in _Hash_node_base (this=) at /opt/gcc-10.2.0/include/c++/10.2.0/bits/hashtable.h:1173 59 LWP 66502 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 58 LWP 66501 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 57 LWP 66500 __lll_lock_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135 56 LWP 66499 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 55 LWP 66498 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 54 LWP 66497 __lll_lock_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135 53 LWP 66496 __lll_lock_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135 52 LWP 66495 __lll_lock_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135 51 LWP 66494 0x00007fdf1bb2b455 in je_extent_heap_remove_first (ph=ph@entry=0x7fdf14008648) at src/extent.c:283 50 LWP 66493 __lll_lock_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135 49 LWP 66492 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 48 LWP 66491 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 47 LWP 66490 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 46 LWP 66489 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 45 LWP 66488 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 44 LWP 66487 0x00000000009c84cd in _Function_base (this=) at /opt/gcc-10.2.0/include/c++/10.2.0/bits/std_function.h:88 43 LWP 66486 0x00007fdf1baf468d in extent_list_remove (extent=0x7fde5858ee40, list=0x7fdf14007fc0) at include/jemalloc/internal/extent_inlines.h:440 42 LWP 66485 __lll_lock_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135 41 LWP 66484 0x00000000009fc134 in __shared_ptr (__r=, this=) at /opt/gcc-10.2.0/include/c++/10.2.0/bits/stl_algobase.h:398 40 LWP 66483 pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238 39 LWP 66482 pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238 38 LWP 66317 0x00007fdf19f2e0e3 in epoll_wait () at ../sysdeps/unix/syscall-template.S:81 37 LWP 66316 syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38 36 LWP 66315 syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38 35 LWP 66314 syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38 34 LWP 66313 syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38 33 LWP 66312 syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38 32 LWP 66311 0x00007fdf1baf45f2 in bitmap_unset (binfo=, bit=, bitmap=0x7fde58a14780) at include/jemalloc/internal/bitmap.h:344 31 LWP 66310 syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38 30 LWP 66309 0x00007fdf19f24d7d in fdatasync () at ../sysdeps/unix/syscall-template.S:81 29 LWP 66308 syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38 28 LWP 66307 syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38 27 LWP 66306 0x00007fdf1c5f3fc3 in pread64 () at ../sysdeps/unix/syscall-template.S:81 26 LWP 66302 syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38 25 LWP 66301 syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38 24 LWP 66300 syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38 23 LWP 66299 syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38 22 LWP 66298 syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38 21 LWP 66297 syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38 20 LWP 66296 syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38 19 LWP 66295 syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38 18 LWP 66294 0x00007fdf19f2e0e3 in epoll_wait () at ../sysdeps/unix/syscall-template.S:81 17 LWP 66293 0x00007fdf19f2e0e3 in epoll_wait () at ../sysdeps/unix/syscall-template.S:81 16 LWP 66292 0x00007fdf19f2e0e3 in epoll_wait () at ../sysdeps/unix/syscall-template.S:81 15 LWP 66291 0x00007fdf19f2e0e3 in epoll_wait () at ../sysdeps/unix/syscall-template.S:81 14 LWP 66290 0x00007fdf19f2e0e3 in epoll_wait () at ../sysdeps/unix/syscall-template.S:81 13 LWP 66289 0x00007fdf19f2e0e3 in epoll_wait () at ../sysdeps/unix/syscall-template.S:81 12 LWP 66288 0x00007fdf19f2e0e3 in epoll_wait () at ../sysdeps/unix/syscall-template.S:81 11 LWP 66287 0x00007fdf19f22ddd in poll () at ../sysdeps/unix/syscall-template.S:81 10 LWP 66286 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 9 LWP 66285 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 8 LWP 66273 pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238 7 LWP 66270 pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238 6 LWP 66266 0x00007fdf19f22ddd in poll () at ../sysdeps/unix/syscall-template.S:81 5 LWP 66265 pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238 4 LWP 66264 pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238 3 LWP 66254 pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238 2 LWP 66253 0x00007fdf19f2e0e3 in epoll_wait () at ../sysdeps/unix/syscall-template.S:81 * 1 LWP 66304 0x00007fdf19e65387 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:55 No core file now.