Hi,
sorry as all my mons were down with the same error - i was in a hurry
made sadly no copy of the mons and workaround by hack ;-( but i posted a
log to pastebin with debug mon 20. (see last email)
Stefan
Mit freundlichen Grüßen
Stefan Priebe
Bachelor of Science in Computer Science (BSCS)
Vorstand (CTO)
-------------------------------
Profihost AG
Am Mittelfelde 29
30519 Hannover
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Tel.: +49 (511) 5151 8181 | Fax.: +49 (511) 5151 8282
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Vorstand: Cristoph Bluhm, Sebastian Bluhm, Stefan Priebe
Aufsichtsrat: Prof. Dr. iur. Winfried Huck (Vorsitzender)
Am 19.07.2013 14:54, schrieb Joao Eduardo Luis:
On 07/19/2013 09:31 AM, Stefan Priebe wrote:
this fixes a failure like:
0> 2013-07-19 09:29:16.803918 7f7fb5f31780 -1 mon/OSDMonitor.cc:
In function 'virtual void OSDMonitor::update_from_paxos(bool*)' thread
7f7fb5f31780 time 2013-07-19 09:29:16.803439
mon/OSDMonitor.cc: 132: FAILED assert(latest_bl.length() != 0)
ceph version 0.61.5-15-g72c7c74
(72c7c74e1f160e6be39b6edf30bce09b770fa777)
1: (OSDMonitor::update_from_paxos(bool*)+0x16e1) [0x51d121]
2: (PaxosService::refresh(bool*)+0xe6) [0x4f2a46]
3: (Monitor::refresh_from_paxos(bool*)+0x57) [0x48f7b7]
4: (Monitor::init_paxos()+0xe5) [0x48f955]
5: (Monitor::preinit()+0x679) [0x4b1cf9]
6: (main()+0x36b0) [0x484bb0]
7: (__libc_start_main()+0xfd) [0x7f7fb408dc8d]
8: /usr/bin/ceph-mon() [0x4801e9]
NOTE: a copy of the executable, or `objdump -rdS <executable>` is
needed to interpret this.
---
src/mon/OSDMonitor.cc | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/src/mon/OSDMonitor.cc b/src/mon/OSDMonitor.cc
index 9c854cd..ab3b8ec 100644
--- a/src/mon/OSDMonitor.cc
+++ b/src/mon/OSDMonitor.cc
@@ -129,6 +129,12 @@ void OSDMonitor::update_from_paxos(bool
*need_bootstrap)
if ((latest_full > 0) && (latest_full > osdmap.epoch)) {
bufferlist latest_bl;
get_version_full(latest_full, latest_bl);
+
+ if (latest_bl.length() == 0 && latest_full != 0 &&
get_first_committed() > 1) {
latest_full is always > 0 here, following the previous if check.
+ dout(0) << __func__ << " latest_bl.length() == 0 use
first_commited instead of latest_full" << dendl;
+ latest_full = get_first_committed();
+ get_version_full(latest_full, latest_bl);
+ }
assert(latest_bl.length() != 0);
dout(7) << __func__ << " loading latest full map e" <<
latest_full << dendl;
osdmap.decode(latest_bl);
Although appreciated, this patch fixes the symptom leading to the crash.
The bug itself seems to be that there is a latest_full version that is
empty. Until we know for sure what is happening and what is leading to
such state, fixing the symptom is not advisable, as it is not only
masking the real issue but it may also have unforeseen long-term effects.
Stefan, do you still have the store state on which this was triggered?
If so, can you share it with us (or dig a bit into it yourself if you
can't share the store, in which case I'll let you know what to look for).
-Joao
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