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Hyper-V Failover Cluster error

We have a 3 node failover cluster running about 30 hyper-v VMs.  Over the past month, we've had failures three times.  After looking at the error logs, the following message appears as the first error when the failure occurred:

Cluster resource 'xxxxxxx' (resource type ", DLL 'vmclusres.dll') either crashed or deadlocked.  The Resource Hosting Subsystem (RHS) process will now attempt to terminate, and the resource will be marked to run in a separate monitor.

It appears on random nodes, and the cluster resource (marked by xxxxxxx above) appears to be random VMs when it occurs.

Any idea where to start?
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awarren85
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awarren85
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1 Solution
 
Lester_ClaytonCommented:
I've unfortunately had this nasty problem myself.  For me, my cause was that my guests did not have the latest version of the Hyper-V Integration Services.  As Hyper-V is updated through Microsoft Updates, it does not update the Integration Services on the guests, leaving them out-of-date.  Additionally, if your guest is a lower OS version - then it's almost certainly going to be out of date.  For example, if your guest is Windows 2008 R2 and your host is Windows 2008 R2 SP1, then the guest will be out of date.

See if you are able to update the Integration Services on all of your guests - it won't matter if it's already up-to-date when you try to update them.  To update, connect to the virtual machine using Hyper-V or Failover Cluster Manager, select "Action" and then "Insert Integration Services Setup Disk".  It should autorun and setup, but you could always manually install it just to be sure.
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Lester_ClaytonCommented:
Incidentally, I now run a 4 Sever Cluster with 219 guests - all my hosts have been up for well over 2 months without issues :)
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awarren85Author Commented:
Thanks very much for your quick response. I will check this this evening
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awarren85Author Commented:
Thank you very much for your comments -- Many of our VMs were out of date.  Will patch and see how things go.
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