We are using System Center DPM 2012 SP1 to backup our Server 2012 Hyper-V Cluster and sometimes we have VM's that are stuck in a state of "backing up..." on the Hyper-V manager however DPM and the VSS Writers both say that the backups have failed. We are unable to migrate or shutdown the guest VM's that are stuck in this state.
So far the only workaround we have found is to fail all the VM's that are not in this status to another host, then kill the cluster service on the host with the stuck VM's to force them to migrate to another host which also causes an unexpected reboot of the guest.
I was wondering if there is any other method to cancel or get the VMs out of this state and/or fail them over to another host without having to kill the cluster service?