On Mon, Jun 4, 2012 at 1:44 AM, Yann Dupont <yann.dup...@univ-nantes.fr> wrote:
> Results : Worked like a charm during two days, apart btrfs warn messages
> then OSD begin to crash 1 after all 'domino style'.

Sorry to hear that. Reading through your message, there seem to be
several problems; whether they are because of the same root cause, I
can't tell.

Quick triage to benefit the other devs:

#1: kernel crash, no details available
> 1 of the physical machine was in kernel oops state - Nothing was remote

#2: leveldb corruption? may be memory corruption that started
elsewhere.. Sam, does this look like the leveldb issue you saw?
>  [push] v 1438'9416 snapset=0=[]:[] snapc=0=[]) v6 currently started
>     0> 2012-06-03 12:55:33.088034 7ff1237f6700 -1 *** Caught signal
> (Aborted) **
...
>  13: (leveldb::InternalKeyComparator::FindShortestSeparator(std::string*,
> leveldb::Slice const&) const+0x4d) [0x6ef69d]
>  14: (leveldb::TableBuilder::Add(leveldb::Slice const&, leveldb::Slice
> const&)+0x9f) [0x6fdd9f]

#3: PG::merge_log assertion while recovering from the above; Sam, any ideas?
>     0> 2012-06-03 13:36:48.147020 7f74f58b6700 -1 osd/PG.cc: In function
> 'void PG::merge_log(ObjectStore::Transaction&, pg_info_t&, pg_log_t&, int)'
> thread 7f74f58b6700 time 2012-06-03 13:36:48.100157
> osd/PG.cc: 402: FAILED assert(log.head >= olog.tail && olog.head >=
> log.tail)

#4: unknown btrfs warnings, there should an actual message above this
traceback; believed fixed in latest kernel
> Jun  2 23:40:03 chichibu.u14.univ-nantes.prive kernel: [200652.479278]
> [<ffffffffa026fca5>] ? btrfs_orphan_commit_root+0x105/0x110 [btrfs]
> Jun  2 23:40:03 chichibu.u14.univ-nantes.prive kernel: [200652.479328]
> [<ffffffffa026965a>] ? commit_fs_roots.isra.22+0xaa/0x170 [btrfs]
> Jun  2 23:40:03 chichibu.u14.univ-nantes.prive kernel: [200652.479379]
> [<ffffffffa02bc9a0>] ? btrfs_scrub_pause+0xf0/0x100 [btrfs]
> Jun  2 23:40:03 chichibu.u14.univ-nantes.prive kernel: [200652.479415]
> [<ffffffffa026a6f1>] ? btrfs_commit_transaction+0x521/0x9d0 [btrfs]
> Jun  2 23:40:03 chichibu.u14.univ-nantes.prive kernel: [200652.479460]
> [<ffffffff8105a9f0>] ? add_wait_queue+0x60/0x60
> Jun  2 23:40:03 chichibu.u14.univ-nantes.prive kernel: [200652.479493]
> [<ffffffffa026aba0>] ? btrfs_commit_transaction+0x9d0/0x9d0 [btrfs]
> Jun  2 23:40:03 chichibu.u14.univ-nantes.prive kernel: [200652.479543]
> [<ffffffffa026abb1>] ? do_async_commit+0x11/0x20 [btrfs]
> Jun  2 23:40:03 chichibu.u14.univ-nantes.prive kernel: [200652.479572]
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