[ovirt-users] ovirt 3.5.2 issues with nodes becoming "Non Operational"

[Chris Liebman]

Hi,
   I'm new to oVirt and recently built a 10 node ovirt 3.5 DC with shared
storage using gluster configured as distributed-replicated (replication =
2).  Shortly after 7 of the 10 nodes dropped, one at a time over a few
hours, into "Non Operational" state.  Attempting to activate one of these
nodes gives the error:  "Failed to connect Host ovirt-node260 to Storage
Pool LADC-TBX". Attempting to put the node into Maintenance eaves the node
stuck in "Preparing For maintenance".

When I rebooted one of the nodes I see this in the nodes event list:

"Host ovirt-node269 reports about one of the Active Storage Domains as
Problematic."

I see many of these errors in the vdsm log from the failed nodes:

Thread-10000::ERROR::2015-08-12
> 10:01:17,748::__init__::506::jsonrpc.JsonRpcServer::(_serveRequest)
> Internal server error
>
> Traceback (most recent call last):
>
>   File "/usr/lib/python2.6/site-packages/yajsonrpc/__init__.py", line 501,
> in _serveRequest
>
>     res = method(**params)
>
>   File "/usr/share/vdsm/rpc/Bridge.py", line 267, in _dynamicMethod
>
>     result = fn(*methodArgs)
>
>   File "/usr/share/vdsm/API.py", line 1330, in getStats
>
>     stats.update(self._cif.mom.getKsmStats())
>
>   File "/usr/share/vdsm/momIF.py", line 60, in getKsmStats
>
>     stats = self._mom.getStatistics()['host']
>
>   File "/usr/lib/python2.6/site-packages/mom/MOMFuncs.py", line 75, in
> getStatistics
>
>     host_stats = self.threads['host_monitor'].interrogate().statistics[-1]
>
> AttributeError: 'NoneType' object has no attribute 'statistics'
>
Any help here is appreciated.

    -- Chris
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