root@ceph01:~# gdb /usr/lib/debug/usr/bin/cmon /core GNU gdb (GDB) 7.1-ubuntu Copyright (C) 2010 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-linux-gnu". For bug reporting instructions, please see: ... Reading symbols from /usr/lib/debug/usr/bin/cmon...done. [New Thread 1497] [New Thread 1590] [New Thread 1474] [New Thread 1475] [New Thread 1477] [New Thread 1489] [New Thread 1490] [New Thread 1591] [New Thread 1478] warning: Unable to find dynamic linker breakpoint function. GDB will be unable to debug shared library initializers and track explicitly loaded dynamic code. Core was generated by `/usr/bin/cmon -i 0 -c /etc/ceph/ceph.conf'. Program terminated with signal 11, Segmentation fault. #0 0x0000000000451b43 in Message::set_throttler (this=0x1fb7490) at msg/Message.h:286 286 msg/Message.h: No such file or directory. in msg/Message.h (gdb) bt #0 0x0000000000451b43 in Message::set_throttler (this=0x1fb7490) at msg/Message.h:286 #1 SimpleMessenger::Pipe::read_message (this=0x1fb7490) at msg/SimpleMessenger.cc:1833 #2 0x0000000000000000 in ?? () (gdb) quit