On Fri, Sep 5, 2014 at 4:05 PM, Florent Bautista <florent at coppint.com> wrote: > Firefly :) last release. > > After few days, second MDS is still "stopping" and consuming CPU > sometimes... :) Try restarting the stopping MDS and run "ceph mds stop 1" again. > > On 09/04/2014 09:13 AM, Yan, Zheng wrote: >> which version of MDS are you using? >> >> On Wed, Sep 3, 2014 at 10:48 PM, Florent Bautista <florent at coppint.com> wrote: >>> Hi John and thank you for your answer. >>> >>> I "solved" the problem doing : ceph mds stop 1 >>> >>> So one MDS is marked as "stopping". A few hours later, it is still >>> "stopping" (active process, consuming CPU sometimes). >>> >>> So the other seems to respond fine to clients... >>> >>> Multi-MDS is really really really unstable :-D >>> >>> On 09/03/2014 04:00 PM, John Spray wrote: >>>> Hi Florent, >>>> >>>> The first thing to do is to turn up the logging on the MDS (if you >>>> haven't already) -- set "debug mds = 20" >>>> http://ceph.com/docs/master/rados/troubleshooting/log-and-debug/#subsystem-log-and-debug-settings >>>> >>>> Since you say they appear as 'active' in "ceph status", I assume they >>>> are running rather than crashing again, but it would be good to log >>>> into the MDS servers and check that there really are running ceph-mds >>>> processes. If the MDS daemons are running but apparently >>>> unresponsive, you may be able to get a little bit of extra info from >>>> the running MDS by doing "ceph daemon mds.<name> <command>", where >>>> interesting commands are dump_ops_in_flight, status, objecter_ops >>>> >>>> Hopefully that will give us some clues. >>>> >>>> Cheers, >>>> John >>>> >>>> On Wed, Sep 3, 2014 at 11:52 AM, Florent Bautista >>>> <bautista.florent at gmail.com> wrote: >>>>> Hi everyone, >>>>> >>>>> I use Ceph Firefly release. >>>>> >>>>> I had a MDS cluster with only one MDS until yesterday, when I tried to add a >>>>> second one to test multi-mds. I thought I could get back to one MDS when I >>>>> want, but it seems we can't ! >>>>> >>>>> Both crashed this night, and I am unable to get them back today. >>>>> >>>>> They appear as active in ceph -s, clients using 3.16 kernel mount it but no >>>>> operation can be done : "ls" is freezing, load average of client is climbing >>>>> and nothing is done by MDSes (not using CPU, nothing in logs except some >>>>> "mdsload" messages and after some time : closing stale session client). >>>>> >>>>> How can I do to debug this situation and recover my data ? >>>>> >>>>> Thank you a lot. >>>>> >>>>> _______________________________________________ >>>>> ceph-users mailing list >>>>> ceph-users at lists.ceph.com >>>>> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >>>>> >>>> _______________________________________________ >>>> ceph-users mailing list >>>> ceph-users at lists.ceph.com >>>> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >>> _______________________________________________ >>> ceph-users mailing list >>> ceph-users at lists.ceph.com >>> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >
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