Backup failed. Failed to backup disk: Failed to get changed regions. Connection to cluster timed out.

[Kiattipong]

We have 2 of 40 Guest vm error **Backup failed. Failed to backup disk: Failed to get changed regions. Connection to cluster timed out.

11/23/2022 5:59:07 PM Job started
11/23/2022 5:59:07 PM Building list of machines to process
11/23/2022 5:59:13 PM VMs size: 6.1 TB
11/23/2022 5:59:14 PM VM NAME: Preparing to backup
11/23/2022 5:59:14 PM All VMs have been queued for processing
11/23/2022 5:59:21 PM VM NAME : Crash consistent snapshot was created.
11/23/2022 5:59:35 PM VM NAME: Backup in progress
11/24/2022 12:43:31 AM VM NAME: Running retention
11/24/2022 12:45:53 AM VM NAME: Finalizing backup
11/24/2022 12:45:55 AM VM NAME: Backup failed. Failed to backup disk: Failed to get changed regions. Connection to cluster timed out.
11/24/2022 12:45:55 AM Applying retention policy
11/24/2022 12:45:59 AM Retention policy has been applied successfully
11/24/2022 12:45:59 AM Job finished with error

we try to find solution but still can't find
Please help me solve

Thank you.

[Kiattipong]

[Kochkin]

This error means that CVM failed to process 1 GB of CBT data region for a timeout period (1 min by default afaik).

Typically, that happens when CVM does not have enough compute resources. You can try increasing CVM's ram (can be done from ahv web UI) or you can try to reach Veeam support. You can also try to increase the request timeout period, but I do not recommend it, since the issue can still appear and backup speed will be really slow.

[asm19]

You solve your problem?
I have the exact same problem with one VM with 3.5TB

AOS: 6.5.1.6 LTS
CVM RAM: 32GB

I will try increase the RAM of CVM.

[asm19]

Not work, now I have all VMs with error.

[tedsteenvoorden]

Have these problems be resolved and where they related to a specific AOS version?