On 03/09/2018 16:04, Willem Jan Withagen wrote:
Hi,
Since about 2 week master is crashing on one of my new test servers.
And I can't seem to figure out why.
It looks even like it crashes before ceph-mon starts to fork off
threads, when I'm using vstart.sh to get a test cluster?
Log dump is below, but the last message stems from:
./src/mon/OSDMonitor.cc:859
creating_pgs_t
OSDMonitor::update_pending_pgs() {
........
........
dout(10) << __func__ << " queue remaining: " <<
pending_creatings.queue.size()
<< " pools" << dendl;
dout(10) << __func__
<< " " << (pending_creatings.pgs.size() - total)
<< "/" << pending_creatings.pgs.size()
<< " pgs added from queued pools" << dendl;
return pending_creatings;
}
Continue from there gives:
Thread 1 received signal SIGSEGV, Segmentation fault.
0x0000000803a2587b in OSDMap::check_health (this=0x7fffffff3c68,
checks=0x7fffffff3778)
at /home/wjw/wip/src/osd/OSDMap.cc:4999
4999 float fsr = g_conf()->osd_failsafe_full_ratio;
Which is on the lines:
4995 // OSD_OUT_OF_ORDER_FULL
4996 {
4997 // An osd could configure failsafe ratio, to something
different
4998 // but for now assume it is the same here.
4999 float fsr = g_conf()->osd_failsafe_full_ratio;
5000 if (fsr > 1.0) fsr /= 100;
5001 float fr = get_full_ratio();
5002 float br = get_backfillfull_ratio();
5003 float nr = get_nearfull_ratio();
And in the end the debugger tells me it crashed like:
#0 0x0000000803a2587b in OSDMap::check_health (this=0x7fffffff3c68,
checks=0x7fffffff3778)
at /home/wjw/wip/src/osd/OSDMap.cc:4999
#1 0x0000000000de2c71 in OSDMonitor::encode_pending (this=0x2e24000,
t=...) at /home/wjw/wip/src/mon/OSDMonitor.cc:1459
#2 0x00000000010399cf in PaxosService::propose_pending (this=0x2e24000)
at /home/wjw/wip/src/mon/PaxosService.cc:213
#3 0x000000000103b8b2 in PaxosService::_active (this=0x2e24000) at
/home/wjw/wip/src/mon/PaxosService.cc:334
#4 0x000000000103af96 in PaxosService::election_finished
(this=0x2e24000) at /home/wjw/wip/src/mon/PaxosService.cc:290
#5 0x0000000000bc5969 in Monitor::_finish_svc_election (this=0x2e11000)
at /home/wjw/wip/src/mon/Monitor.cc:1960
#6 0x0000000000bc4af7 in Monitor::win_election (this=0x2e11000,
epoch=7, active=..., features=4611087854031142911,
mon_features=..., metadata=...) at
/home/wjw/wip/src/mon/Monitor.cc:1994
#7 0x0000000000bb5e28 in Monitor::win_standalone_election
(this=0x2e11000) at /home/wjw/wip/src/mon/Monitor.cc:1935
#8 0x0000000000bb3360 in Monitor::bootstrap (this=0x2e11000) at
/home/wjw/wip/src/mon/Monitor.cc:1033
#9 0x0000000000bb28ed in Monitor::init (this=0x2e11000) at
/home/wjw/wip/src/mon/Monitor.cc:838
#10 0x0000000000b29898 in main (argc=10, argv=0x7fffffffe818) at
/home/wjw/wip/src/ceph_mon.cc:794
Suggesting that g_conf() return a pointer that is is not valid...????
And it is consistently at the location that it crashes...
As usual, any suggestions are welcome.
Did some more GDB tracing after a hunch, and I've now crudely augmented
src/common/config_proxy.h:
41 ConfigValues* operator->() noexcept {
42 assert((__uint64_t)(&values) != 0x0);
43 assert((__uint64_t)(&values) > 0xfffff);
44 return &values;
45 }
Turns out values = 0x8... Not much of an address.
Normally it is something like: 0x28f1008
Not sure if the 8 is the significant denominator here
--WjW
