Re: rocksdb corruption, stale pg, rebuild bucket index

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On Wed, 12 Jun 2019, Harald Staub wrote:
> On 12.06.19 17:40, Sage Weil wrote:
> > On Wed, 12 Jun 2019, Harald Staub wrote:
> > > Also opened an issue about the rocksdb problem:
> > > https://tracker.ceph.com/issues/40300
> > 
> > Thanks!
> > 
> > The 'rocksdb: Corruption: file is too short' the root of the problem
> > here. Can you try starting the OSD with 'debug_bluestore=20' and
> > 'debug_bluefs=20'?  (And attach them to the ticket, or ceph-post-file and
> > put the uuid in the ticket..)
> 
> Now we have a log file of size 270 GB, so we tried to extract the interesting
> part:
> ceph-post-file: 78842f1f-1981-4a81-b3f4-3a3ca1dc6ae3
> Is that ok?

Hmm, it looks like bluefs is crashing reading a very large .sst file 
(~13GB).  Can you look back in teh logs a bit to see the *first* crash of 
this OSD?  Presumably it's not not part of BlueStore::_mount ...

Also, can you try ceph-bluestore-tool bluefs-export on this osd?  I'm 
pretty sure it'll crash in the same spot, but just want to confirm 
it's a bluefs issue.

Thanks!
s

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