Just encountered a problem recently.
Configured a vmware backup, we backing up a VMWARE host server (using Netbackup 18.104.22.168). Previously the backup was successful, the last time the backup run it has an error. During backup the VMware backup the VMware Host unexpected shutting down. We tried to run the backup several times, the VMware host keeps on shutting down, everytime that the backup triggered. I requested to check also issue to VM vendor to check on the VM side. What seems to be the problem why the VM host keeps on shtutting down everytime the backup run.