[ovirt-users] Communication errors between engine and nodes?

[Michal Skrivanek]

On 13 Mar 2015, at 14:39, Chris Adams wrote:

> Once upon a time, Roel de Rooy <RdeRooy at motto.nl> said:
>> We are observing the same thing with our oVirt environment.
>> At random moments (could be a couple of times a day , once a day or even once every couple of days), we receive the "VDSNetworkException" message on one of our nodes.
>> Haven't seen the "heartbeat exceeded" message, but could be that I overlooked it within our logs.
>> At some rare occasions, we also do see "Host cannot access the Storage Domain(s) <UNKNOWN> attached to the Data Center", within the GUI.
>> 
>> VM's will continue to run normally and most of the times the nodes will be in "UP" state again within the same minute.
>> 
>> Will still haven't found the root cause of this issue.
>> Our engine is CentOS 6.6 based and it's happing with both Centos 6 and Fedora 20 nodes.
>> We are using a LCAP bond of 1Gbit ports for our management network.
>> 
>> As we didn't see any reports about this before, we are currently looking if something network related is causing this.
> 
> I just opened a BZ on it (since it isn't just me):
> 
> https://bugzilla.redhat.com/show_bug.cgi?id=1201779
> 
> My cluster went a couple of days without hitting this (as soon as I
> posted to the list of course), but then it happened several times
> overnight.  Interestingly, one error logged was communicating with the
> node currently running my hosted engine.  That should rule out external
> network (e.g. switch and such) issues, as those packets should not have
> left the physical box.

well, hosted engine complicates things as you'd need to be able to see the status of the engine guest
running a standalone engine installation or at least running that hosted engine on a single node without any other VM may help….

Thanks,
michal

> 
> -- 
> Chris Adams <cma at cmadams.net>
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