[Ocfs2-users] o2cb stack and kernel >= 2.6.37

[Werner Flamme]

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Sunil Mushran [08.04.2011 18:24]:
> On 04/08/2011 08:01 AM, Werner Flamme wrote:
>> Joel, I think I encountered otherwise :-(
>>
>> In our OCFS2 cluster there are up to 15 active nodes. 7 of them were
>> running yesterday (2 with Oracle Linux, 5 with SLES 11 SP1 + SLE HAE
>> SP1). When applying the last patches of the SLE HAE, the patched nodes
>> talked dlm 1.1 and did not fallback. They silently unmunted three
>> volumes, the fourth volume stayed connected (there was no data on it).
>> In the logs, I found entries like
>>
>> dlm_query_join_proto_check:734 Node 5 wanted to join with DLM locking
>> protocol 1.0, but we have 1.1, disallowing
>> o2net: connection to node vocnod9 (num 5) at 141.65.171.51:7777
>> shutdown, state 8
>> o2net: no longer connected to node vocnod9 (num 5) at 141.65.171.51:7777
>>
>> and node 5 lost access to at least one volume straight after this.
>>
>> Maybe a specialty of SUSE, I don't know. I could not get the nodes to
>> communicate with the rest of the cluster, I had to undo all of the
>> patches provided from HAE SP1-update repo and to reboot before it worked
>> again. Maybe the libdlm3 package was the culprit. I opened a support
>> case at Novell and will report back what they say...
> 
> Yes, this is a bug and we have a fix for this headed to mainline.
> http://oss.oracle.com/pipermail/ocfs2-devel/2011-April/007996.html

Thanks for this info. Novell provided a PTF to fix it, and it really
fixed the issue, so it will be part of Novell's next update for the
ocfs2 kernel modules for SLE-11-HAE-SP1.

Regards,
Werner
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