On Thu, 15 Nov 2012, Stefan Priebe - Profihost AG wrote:
> Am 14.11.2012 15:59, schrieb Sage Weil:
> > Hi Stefan,
> >
> > I would be nice to confirm that no clients are waiting on replies for
> > these requests; currently we suspect that the OSD request tracking is the
> > buggy part. If you query the OSD admin socket you should be able to dump
> > requests and see the client IP, and then query the client.
> >
> > Is it librbd? In that case you likely need to change the config so that
> > it is listening on an admin socket ('admin socket = path').
>
> Yes it is. So i have to specify admin socket at the KVM host?
Right. IIRC the disk line is a ; (or \;) separated list of key/value
pairs.
> How do i query the admin socket for requests?
ceph --admin-daemon /path/to/socket help
ceph --admin-daemon /path/to/socket objecter_dump (i think)
sage
>
> Stefan
>
>
> > On Wed, 14 Nov 2012, Stefan Priebe - Profihost AG wrote:
> >
> > > Hello list,
> > >
> > > i see this several times. Endless flying slow requests. And they never
> > > stop
> > > until i restart the mentioned osd.
> > >
> > > 2012-11-14 10:11:57.513395 osd.24 [WRN] 1 slow requests, 1 included below;
> > > oldest blocked for > 31789.858457 secs
> > > 2012-11-14 10:11:57.513399 osd.24 [WRN] slow request 31789.858457 seconds
> > > old,
> > > received at 2012-11-14 01:22:07.654922: osd_op(client.30286.0:6719
> > > rbd_data.75c55bf2fdd7.0000000000001399 [write 282624~4096] 3.3f6d2373) v4
> > > currently delayed
> > > 2012-11-14 10:11:58.513584 osd.24 [WRN] 1 slow requests, 1 included below;
> > > oldest blocked for > 31790.858646 secs
> > > 2012-11-14 10:11:58.513586 osd.24 [WRN] slow request 31790.858646 seconds
> > > old,
> > > received at 2012-11-14 01:22:07.654922: osd_op(client.30286.0:6719
> > > rbd_data.75c55bf2fdd7.0000000000001399 [write 282624~4096] 3.3f6d2373) v4
> > > currently delayed
> > > 2012-11-14 10:11:59.513766 osd.24 [WRN] 1 slow requests, 1 included below;
> > > oldest blocked for > 31791.858827 secs
> > > 2012-11-14 10:11:59.513768 osd.24 [WRN] slow request 31791.858827 seconds
> > > old,
> > > received at 2012-11-14 01:22:07.654922: osd_op(client.30286.0:6719
> > > rbd_data.75c55bf2fdd7.0000000000001399 [write 282624~4096] 3.3f6d2373) v4
> > > currently delayed
> > > 2012-11-14 10:12:00.513909 osd.24 [WRN] 1 slow requests, 1 included below;
> > > oldest blocked for > 31792.858971 secs
> > > 2012-11-14 10:12:00.513916 osd.24 [WRN] slow request 31792.858971 seconds
> > > old,
> > > received at 2012-11-14 01:22:07.654922: osd_op(client.30286.0:6719
> > > rbd_data.75c55bf2fdd7.0000000000001399 [write 282624~4096] 3.3f6d2373) v4
> > > currently delayed
> > > 2012-11-14 10:12:01.514061 osd.24 [WRN] 1 slow requests, 1 included below;
> > > oldest blocked for > 31793.859124 secs
> > > 2012-11-14 10:12:01.514063 osd.24 [WRN] slow request 31793.859124 seconds
> > > old,
> > > received at 2012-11-14 01:22:07.654922: osd_op(client.30286.0:6719
> > > rbd_data.75c55bf2fdd7.0000000000001399 [write 282624~4096] 3.3f6d2373) v4
> > > currently delayed
> > >
> > > When i now restart osd 24 they go away and everything is fine again.
> > >
> > > Stefan
> > > --
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> > >
> > >
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