[ceph-users] bad crc/signature errors

Jason Dillaman jdillama at redhat.com
Wed Oct 4 11:44:56 PDT 2017


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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-- 
Jason


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