veeam backup vs hyperv suddenly fails (Microsoft Hyperv-V VSS Writer is non-retryable error state)

Question

_{Sunday, January 15, 2017 11:36 AM}

Hi

2012 r2 hyperv, using veeam backup and replication 9.5 for backups.

Suddenly backup stopped working an the error that throws:

1/15/2017 3:19:47 AM :: Unable to allocate processing resources. Error: Writer 'Microsoft Hyper-V VSS Writer' is failed at 'VSS_WS_FAILED_AT_PREPARE_SNAPSHOT'.
The writer experienced a non-transient error.  If the backup process is retried,
the error is likely to reoccur.
--tr:Failed to verify writers state.
--tr:Failed to perform pre-backup tasks.

If we run vssadmin list writers on hyperv host we see that Microsoft Hyperv-V VSS Writer is non-retryable error state. If we restart hyperv management service then this error disappears for awhile, until we dont trigger backup again.

we have even rebooted hyperv host but that did not solve it .

Please advise

bostjanc

All replies (4)

_{Sunday, January 15, 2017 12:11 PM}

We see that the only problem is with one VM, and that VM is Linux.

Any hints?

bostjanc

_{Monday, January 16, 2017 2:14 AM}

Hi Bostjanc,

First ensure you are running a supported OS:

https://technet.microsoft.com/en-us/windows-server-docs/compute/hyper-v/supported-linux-and-freebsd-virtual-machines-for-hyper-v-on-windows

Have you installed the Linux integration services?

https://www.microsoft.com/en-us/download/details.aspx?id=46842

Have you tried widows server backup and is it successful?

Best Regards,

Leo

Please remember to mark the replies as answers if they help.
If you have feedback for TechNet Subscriber Support, contact [email protected].

_{Monday, January 16, 2017 8:58 AM}

Thanks for the reply Will take a look.

bostjanc

_{Friday, September 22, 2017 7:20 AM}

Hi guys.
I was tormented by this problem, but I successfully solved it. In the properties of the virtual machine you need to remove the check mark.
"integration Services" -> "Backup (Volume snapshot)"
After that, the backup was successful.
Good luck.