Hi John and thank you for your explanations :) It could be a network issue. MDS should respawn, but "ceph-mds" process was no more running after last log message, so I deduced it crashed... On 03/09/2016 12:26 PM, John Spray wrote: > The MDS restarted because it received an MDSMap from the monitors in > which its own entry had been removed. > > This is usually a sign that the MDS was failing to communicate with > the mons for some period of time, and as a result the mons have given > up and cause another MDS to take over. However, in this instance we > can see the mds and mon exchanging beacons regularly. > > The last acknowledged beacon from was at 2016-03-09 04:53:38.824983 > > The updated mdsmap came at 04:53:56. 18 seconds shouldn't have been > long enough for anything to time out, unless you've changed the > defaults. > > I notice that the new MDSMap (epoch 573) also indicates that peer MDS > daemons have been failed, and that shortly before receiving the new > map, there are a bunch of log messages indicating various client > connections resetting. > > So from this log I would guess some kind of network issue? > > You say that the MDS crashed, why? From the log it looks like it's > respawning itself, which shouldn't immediately be noticeable, you > should just see another MDS daemon take over, and a few seconds later > this guy would come back as a standby. > > John > > On Wed, Mar 9, 2016 at 9:55 AM, Florent B <florent@xxxxxxxxxxx> wrote: >> Hi everyone, >> >> Last night one of my MDS crashed. >> >> It was running last Infernalis packaged version for Jessie. >> >> Here is last minutes log : http://paste.ubuntu.com/15333772/ >> >> Does anyone have an idea of what caused the crash ? >> >> Thank you. >> >> Florent >> _______________________________________________ >> ceph-users mailing list >> ceph-users@xxxxxxxxxxxxxx >> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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