[Pacemaker] Pacemaker/corosync freeze

Andrew Beekhof andrew at beekhof.net
Mon Mar 17 21:42:49 EDT 2014

On 13 Mar 2014, at 11:44 pm, Attila Megyeri <amegyeri at minerva-soft.com> wrote:

> Hello,
>> -----Original Message-----
>> From: Jan Friesse [mailto:jfriesse at redhat.com]
>> Sent: Thursday, March 13, 2014 10:03 AM
>> To: The Pacemaker cluster resource manager
>> Subject: Re: [Pacemaker] Pacemaker/corosync freeze
>> ...
>>>>>> Also can you please try to set debug: on in corosync.conf and paste
>>>>>> full corosync.log then?
>>>>> I set debug to on, and did a few restarts but could not reproduce
>>>>> the issue
>>>> yet - will post the logs as soon as I manage to reproduce.
>>>> Perfect.
>>>> Another option you can try to set is netmtu (1200 is usually safe).
>>> Finally I was able to reproduce the issue.
>>> I restarted node ctsip2 at 21:10:14, and CPU went 100% immediately (not
>> when node was up again).
>>> The corosync log with debug on is available at:
>>> http://pastebin.com/kTpDqqtm
>>> To be honest, I had to wait much longer for this reproduction as before,
>> even though there was no change in the corosync configuration - just
>> potentially some system updates. But anyway, the issue is unfortunately still
>> there.
>>> Previously, when this issue came, cpu was at 100% on all nodes - this time
>> only on ctmgr, which was the DC...
>>> I hope you can find some useful details in the log.
>> Attila,
>> what seems to be interesting is
>> Configuration ERRORs found during PE processing.  Please run "crm_verify -L"
>> to identify issues.
>> I'm unsure how much is this problem but I'm really not pacemaker expert.
> Perhaps Andrew could comment on that. Any idea?

Did you run the command?  What did it say?

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