Failed to convert the check point to the reference point

[robnicholsonmalt]

I'm using Veeam B&R to backup my development server which is hosting a Centos v7.9 virtual machine on Hyper-V. The VM is backed up every two hours but about once a day, sometimes more, sometimes less, the join has the above warning and the checkpoint is left in Hyper-V:





I have to run the following PowerShell commands to cleanup:

Code: Select all

$Snapshots = @()
$Snapshots += Get-VMSnapshot "Hobbiton - linux server" | ? Name -Like "Veeam*" 
$Snapshots | Remove-VMSnapshot

I've raised several cases (e.g. Case #04976416) but they were always closed as IT support was too busy to help a community user.

Any ideas? I've seen some posts that talk about permissions but they don't seem to make any difference. The fact that it doesn't happen every time the job runs seems to suggest a bug rather than a configuration problem.

[PetrM]

Hi Rob,

It does not look like the issue comes from our code as checkpoint management is performed by the hypervisor itself. A backup application just sends a request to create or delete a checkpoint. Nevertheless, I'd recommend to keep opening cases, every attempt increases your chances to reach out our engineers to get the reliable conclusion based on debug logs analysis.

Thanks!

[robnicholsonmalt]

Will do. I've got another small client who uses Veeam as well and the same problem occurs there. Both Windows Server 2019. Doesn't happen as often there.

[PetrM]

Hi Rob,

Please share debug logs from both environments with our engineers, they will decide either these two issues are identical and can be processed within the same support case or different cases are required as they try to handle different issues separately. You can collect debug logs according to the instructions from this KB.

Thanks!

[robnicholsonmalt]

Will do when I get a moment spare.

[robnicholsonmalt]

(Case #04976416 although it was closed a while back)

Is anyone else getting this issue? I kind of parked it until v12 as the workaround of running the following after each VM backup works okay:

Code: Select all

Get-VM | Get-VMSnapshot | ? Name -Like "Veeam*" | Remove-Snapshot

But it's still occurring with V12. The thing is that it doesn't happen for every backup. This is the log of the deleted snapshots over the last few days. There is no discernible pattern.

12/03/2023 11:02:14: No snapshots found
12/03/2023 12:02:02: No snapshots found
12/03/2023 16:02:08: Removing 2 snapshot(s)
12/03/2023 20:29:29: Removing 2 snapshot(s)
13/03/2023 11:03:49: No snapshots found
13/03/2023 12:05:13: No snapshots found
13/03/2023 16:15:39: Removing 1 snapshot(s)
13/03/2023 20:32:02: No snapshots found
14/03/2023 11:40:38: No snapshots found
14/03/2023 12:01:42: Removing 2 snapshot(s)
14/03/2023 16:41:47: Removing 2 snapshot(s)
14/03/2023 20:01:48: No snapshots found
15/03/2023 11:01:48: No snapshots found
15/03/2023 12:01:57: Removing 2 snapshot(s)
15/03/2023 16:32:00: Removing 2 snapshot(s)
15/03/2023 20:02:28: Removing 2 snapshot(s)
16/03/2023 11:30:15: Removing 2 snapshot(s)
16/03/2023 12:01:35: No snapshots found