Ceph

bt
#0 0x00000000005b65d4 in AO_fetch_and_add_full (p=0x8, incr=18446744073709551615) at /usr/include/atomic_ops/sysdeps/gcc/x86_64.h:61
#1 0x00000000005b783d in ceph::atomic_t::dec (this=0x8) at ./include/atomic.h:36
#2 0x00000000005b7feb in RefCountedObject::put (this=0x0) at ./msg/Message.h:154
#3 0x00000000005ed164 in PaxosServiceMessage::get_session (this=0x7faca000e120) at ./messages/PaxosServiceMessage.h:54
#4 0x0000000000641127 in MDSMonitor::preprocess_beacon (this=0x27a2f90, m=0x7faca000e120) at mon/MDSMonitor.cc:162
#5 0x0000000000641a37 in MDSMonitor::preprocess_query (this=0x27a2f90, m=0x7faca000e120) at mon/MDSMonitor.cc:128
#6 0x000000000060dc17 in PaxosService::dispatch (this=0x27a2f90, m=0x7faca000e120) at mon/PaxosService.cc:53
#7 0x000000000060e3d6 in PaxosService::C_RetryMessage::finish (this=0x7fac98018b20, r=0) at mon/PaxosService.h:36
#8 0x000000000060d0c3 in finish_contexts (finished=..., result=0) at ./include/Context.h:56
#9 0x0000000000606cab in Paxos::handle_accept (this=0x27a2d70, accept=0x27de5b0) at mon/Paxos.cc:438
#10 0x0000000000608f60 in Paxos::dispatch (this=0x27a2d70, m=0x27de5b0) at mon/Paxos.cc:799
#11 0x00000000005dea67 in Monitor::_ms_dispatch (this=0x27a1e30, m=0x27de5b0) at mon/Monitor.cc:700
#12 0x00000000005fef89 in Monitor::ms_dispatch(Message*) ()
#13 0x00000000005d7e39 in Messenger::ms_deliver_dispatch(Message*) ()
#14 0x00000000005c5afe in SimpleMessenger::dispatch_entry (this=0x27a11e0) at msg/SimpleMessenger.cc:321
#15 0x00000000005c1e05 in SimpleMessenger::DispatchThread::entry (this=0x27a1558) at msg/SimpleMessenger.h:492
#16 0x00000000005cf461 in Thread::_entry_func (arg=0x27a1558) at ./common/Thread.h:39
#17 0x00007faca994a73a in start_thread (arg=<value optimized out>) at pthread_create.c:300
#18 0x00007faca8b736dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112

10.04.28 16:44:20.617991 7faca7e8b910 mon0(leader).paxos(mdsmap active lc 6) stash_latest v6 len 578
10.04.28 16:44:20.618001 7faca7e8b910 store(dev/mon0) put_bl mdsmap/latest = 590 bytes
10.04.28 16:44:20.746676 7faca7e8b910 mon0(leader).mds e6 new map
10.04.28 16:44:20.746695 7faca7e8b910 mon0(leader).mds e6 print_map
epoch 6

client_epoch 0
created 10.04.28 16:07:40.757900
modified 10.04.28 16:44:19.236215
tableserver 0
root 0
session_timeout 60
session_autoclose 300

compat compat={},rocompat={},incompat={1=base v0.20}

max_mds 1
in <0>
up <0>
failed <>
stopped <>
4101: 10.0.1.252:6802/18330 'a' mds0.1 up:active seq 3
4102: 10.0.1.252:6802/30729 'a' mds-1.0 up:standby seq 1

10.04.28 16:44:20.746766 7faca7e8b910 -- 10.0.1.252:6789/0 --> unknown0 10.0.1.200:0/3039492723 -- mdsmap(e 6) -- ?+0 0x27e2600
10.04.28 16:44:20.746797 7faca7e8b910 mon0(leader).paxosservice(mdsmap) _commit creating new pending
10.04.28 16:44:20.746838 7faca7e8b910 mon0(leader).mds e6 create_pending e7
10.04.28 16:44:20.746846 7faca7e8b910 mon0(leader).mds e6 e6: 1/1/1 up, 1 up:standby, 1 up:active
10.04.28 16:44:20.746871 7faca7e8b910 mon0(leader).mds e6 _updated mds? mdsbeacon(4102/a up:boot seq 1 v0)
10.04.28 16:44:20.746897 7faca7e8b910 log [INF] : mds? 10.0.1.252:6802/30729 up:boot
10.04.28 16:44:20.746923 7faca7e8b910 -- 10.0.1.252:6789/0 --> mon0 10.0.1.252:6789/0 -- log(19 entries) -- ?+0 0x27e2b00
10.04.28 16:44:20.746950 7faca7e8b910 7faca7e8b910 ~MonSession 0x27def50
10.04.28 16:44:20.746964 7faca7e8b910 mon0(leader).paxosservice(mdsmap) dispatch mdsbeacon(4101/a up:active seq 107 v5) from mds0 10.0.1.252:6802/18330
10.04.28 16:44:20.746973 7faca7e8b910 mon0(leader).paxos(mdsmap active lc 6) is_readable now=10.04.28 16:44:20.746973 lease_expire=10.04.28 16:44:25.617802 has v5 lc 6
10.04.28 16:44:20.746982 7faca7e8b910 mon0(leader).mds e6 preprocess_query mdsbeacon(4101/a up:active seq 107 v5) from mds0 10.0.1.252:6802/18330