Ceph » CephFS

I started receiving this segfault in ceph-mds with the latest master today.

Core was generated by `./ceph-mds -i a -c ceph.conf'.
Program terminated with signal 11, Segmentation fault.
#0  0x00007f4d50c92b7b in raise (sig=<optimized out>) at ../nptl/sysdeps/unix/sysv/linux/pt-raise.c:42
42    ../nptl/sysdeps/unix/sysv/linux/pt-raise.c: No such file or directory.
(gdb) bt
#0  0x00007f4d50c92b7b in raise (sig=<optimized out>) at ../nptl/sysdeps/unix/sysv/linux/pt-raise.c:42
#1  0x0000000000852736 in reraise_fatal (signum=11) at global/signal_handler.cc:58
#2  handle_fatal_signal (signum=11) at global/signal_handler.cc:104
#3  <signal handler called>
#4  Mutex::Lock (this=0x10, no_lockdep=false) at common/Mutex.cc:80
#5  0x00000000007a1ee1 in Locker (m=..., this=<synthetic pointer>) at ./common/Mutex.h:120
#6  get_pipe (this=0x0) at msg/Message.h:211
#7  SimpleMessenger::mark_down (this=0x2a58000, con=0x0) at msg/SimpleMessenger.cc:589
#8  0x000000000054646c in Server::_session_logged (this=0x2a381c0, session=0x2a36b40, state_seq=<optimized out>, open=<optimized out>, pv=363, inos=..., piv=229) at mds/Server.cc:316
#9  0x00000000005888d7 in C_MDS_session_finish::finish (this=<optimized out>, r=<optimized out>) at mds/Server.cc:157
#10 0x00000000004dfc7a in Context::complete (this=0x358b5e0, r=<optimized out>) at ./include/Context.h:41
#11 0x00000000005047b4 in finish_contexts (cct=0x2a38000, finished=..., result=0) at ./include/Context.h:78
#12 0x00000000006e8f62 in Journaler::_finish_flush (this=0x2a80380, r=<optimized out>, start=5923952, stamp=...) at osdc/Journaler.cc:430
#13 0x0000000000704ef8 in Objecter::handle_osd_op_reply (this=0x2a80000, m=0x3595680) at osdc/Objecter.cc:1484
#14 0x00000000004fd987 in MDS::handle_core_message (this=this@entry=0x2a58b00, m=0x3595680) at mds/MDS.cc:1713
#15 0x00000000004fda83 in MDS::_dispatch (this=this@entry=0x2a58b00, m=m@entry=0x3595680) at mds/MDS.cc:1837
#16 0x00000000004ff87b in MDS::ms_dispatch (this=0x2a58b00, m=0x3595680) at mds/MDS.cc:1648
#17 0x000000000082642b in ms_deliver_dispatch (m=0x3595680, this=0x2a58000) at msg/Messenger.h:553
#18 DispatchQueue::entry (this=0x2a580e8) at msg/DispatchQueue.cc:107
#19 0x00000000007a984d in DispatchQueue::DispatchThread::entry (this=<optimized out>) at msg/DispatchQueue.h:85
#20 0x00007f4d50c8ae9a in start_thread (arg=0x7f4d4bb50700) at pthread_create.c:308
#21 0x00007f4d4f5e1cbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#22 0x0000000000000000 in ?? ()
(gdb)