Another hotfix from Microsoft, this one for when clustered shared volumes go offline or the Cluster service stops during VM backup on a Windows Server 2012 Hyper-V host server.
Symptoms
Consider the following scenario:
- You have a Windows Server 2012 Hyper-V host server.
- You have the server in a cluster environment, and you use cluster shared volumes.
- You try to back up a virtual machine (VM).
In this scenario, you may find that the cluster shared volumes go offline, and resource failover occurs on the other cluster nodes. Then, other VMs also go offline, or the Cluster service stops.
Cause
This problem occurs when there are many snapshots in the VM. This causes the Plug and Play (PnP) functionality on the host to be overwhelmed, and other critical cluster activity cannot finish.
A supported hotfix is available from Microsoft Support.