[ceph-users] bad crc/signature errors

Adrian Saul Adrian.Saul at tpgtelecom.com.au
Wed Oct 4 22:53:36 PDT 2017


We see the same messages and are similarly on a 4.4 KRBD version that is affected by this.

I have seen no impact from it so far that I know about


> -----Original Message-----
> From: ceph-users [mailto:ceph-users-bounces at lists.ceph.com] On Behalf Of
> Jason Dillaman
> Sent: Thursday, 5 October 2017 5:45 AM
> To: Gregory Farnum <gfarnum at redhat.com>
> Cc: ceph-users <ceph-users at lists.ceph.com>; Josy
> <josy at colossuscloudtech.com>
> Subject: Re: [ceph-users] bad crc/signature errors
>
> Perhaps this is related to a known issue on some 4.4 and later kernels [1]
> where the stable write flag was not preserved by the kernel?
>
> [1] http://tracker.ceph.com/issues/19275
>
> On Wed, Oct 4, 2017 at 2:36 PM, Gregory Farnum <gfarnum at redhat.com>
> wrote:
> > That message indicates that the checksums of messages between your
> > kernel client and OSD are incorrect. It could be actual physical
> > transmission errors, but if you don't see other issues then this isn't
> > fatal; they can recover from it.
> >
> > On Wed, Oct 4, 2017 at 8:52 AM Josy <josy at colossuscloudtech.com>
> wrote:
> >>
> >> Hi,
> >>
> >> We have setup a cluster with 8 OSD servers (31 disks)
> >>
> >> Ceph health is Ok.
> >> --------------
> >> [root at las1-1-44 ~]# ceph -s
> >>    cluster:
> >>      id:     de296604-d85c-46ab-a3af-add3367f0e6d
> >>      health: HEALTH_OK
> >>
> >>    services:
> >>      mon: 3 daemons, quorum
> >> ceph-las-mon-a1,ceph-las-mon-a2,ceph-las-mon-a3
> >>      mgr: ceph-las-mon-a1(active), standbys: ceph-las-mon-a2
> >>      osd: 31 osds: 31 up, 31 in
> >>
> >>    data:
> >>      pools:   4 pools, 510 pgs
> >>      objects: 459k objects, 1800 GB
> >>      usage:   5288 GB used, 24461 GB / 29749 GB avail
> >>      pgs:     510 active+clean
> >> ====================
> >>
> >> We created a pool and mounted it as RBD in one of the client server.
> >> While adding data to it, we see this below error :
> >>
> >> ========
> >> [939656.039750] libceph: osd20 10.255.0.9:6808 bad crc/signature
> >> [939656.041079] libceph: osd16 10.255.0.8:6816 bad crc/signature
> >> [939735.627456] libceph: osd11 10.255.0.7:6800 bad crc/signature
> >> [939735.628293] libceph: osd30 10.255.0.11:6804 bad crc/signature
> >>
> >> =========
> >>
> >> Can anyone explain what is this and if I can fix it ?
> >>
> >>
> >> _______________________________________________
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> >> ceph-users at lists.ceph.com
> >> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
> >
> >
> > _______________________________________________
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> > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
> >
>
>
>
> --
> Jason
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