VBR 12.1.0.2131
AHV Plug-In 12.5.1.8
This will be a weird one, hopefully not one most admins will face. Maybe I have something fundamentally wrong here and this is working as designed.
I have a relatively new backup job/chain - a single VMware ESXi VM. I had successfully taken one full backup of that VM. I manually started the job again to get a fresh incremental RP (mostly to get an idea on how much data the VM churns).
While that incremental was running (which I expected take a while) I then attempted to start a restore of the VM to a Nutanix AHV cluster, using the restore point based on the full backup. What I found was that this failed. When trying to do an entire VM restore to AHV, I got this error immediately, the job never actually kicked off:
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Failed to start restoring virtual machine. Failed to execute restoreVM - Object reference not set to an instance of an object.
Failed to execute restoreVM - Object reference not set to an instance of an object.
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Error Failed to start instant recovery session: Failed to publish disks. Failed to publish REDACTED Error: Failed to lock backup files
Item [REDACTED.vib] is locked by running session REDACTED [Backup]
This isn't a particular issue in our environment as our RPOs are pretty lenient but I could see this being problematic for customers who have aggressive/frequent RPOs. Here I'm thinking of a situation where an administrator wants to test a VM restore but doesn't want to disable the backup job in order to complete that restore.
Also to note it - while drafting this post, I took the same restore point in the chain (while the fresh incremental was running) and started a restore to a different VMware cluster and that seems to be working/in progress without error. I think that adds to the possibility of this being a limitation or bug.