On Sat, Sep 3, 2016 at 1:35 AM, Gregory Farnum <gfarnum@xxxxxxxxxx> wrote: > On Fri, Sep 2, 2016 at 2:58 AM, David <dclistslinux@xxxxxxxxx> wrote: >> Hi All >> >> Kernel client: 4.6.4-1.el7.elrepo.x86_64 >> MDS version: 10.2.2 >> OS: CentOS 7 >> >> I have Cephfs mounted on a few servers, I see the following in the log >> approx every 20 secs on all of them: >> >> kernel: ceph: mds0 caps went stale, renewing >> kernel: ceph: mds0 caps stale >> kernel: ceph: mds0 caps renewed >> >> I'm trying to debug a few intermittent nfs related issues (which may or may >> not be cephfs related) and I'm just wondering if these lines are anything to >> worry about. >> >> I've mounted on a server that is almost completely idle and I'm still seeing >> those lines every 20 secs. > > If it's idle I think that's why — normally these are kept live > (unstale) just by passing normal messages back and forth. Although, > Zheng, it ought to be sending off messages prior to stale if there's > no other traffic, shouldn't it? client sends CEPH_SESSION_REQUEST_RENEWCAPS to mds even it's idle. Regards Yan, Zheng > > If you're not seeing any problems on these hosts I don't think you > need to worry about it, though. > > >> Ceph health is OK and the MDS server seems pretty happy although I am >> occasionally seeing some "closing stale session" lines in the ceph-mds log >> but I think that's a separate issue. > > Closing stale sessions means the MDS is removing clients which haven't > checked in for a while. That might be a problem if the client computer > is still around and wants to access the FS. (Alternatively, if you've > got eg laptops mounting CephFS and they're timing out when they get > taken home for the night, not so much.) > -Greg > _______________________________________________ > 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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