Warnings/Errors occur during netbackup VM backup window

[nbustarter380]

Hello,

Windows Admins has informed us that during the Netbackup VMware backup window the following warnings/errors occur.

Warnings: The system failed to flush data to the transaction log. Corruption may occur.
Error: The default transaction resource manager on volume \\?\Volume{3306015f-accf-11e6-a714-0050569c5960} encountered a non-retryable error and could not start.  The data contains the error code.

This apparently happens on all windows vm’s during backup.

Has anyone had this issue before?

Thanks

[GeForce123]

What is the Event ID in the application event logs on the VM?

[Thiago_Ribeiro]

Hi,

Tell us more about your environment

NBU Master S.O
NBU Master Version
NBU Media Version
Policy Configurations
Transport type: SAN / NBD...etc

[sdo]

Well, a one line statement with some error text and no other detail of your environment... means that all anyone can say is that it currently/initially looks like a VMware or Windows or VSS or VMtools or co-related issue, and doesn't appear to be a NetBackup issue - i.e. the act of attempting to take a backup using NetBackup is causing a different element, or co-related elements, within Windows or VSS or VMtools or VMware to generate that event.

A google for:
"Warnings: The system failed to flush data to the transaction log. Corruption may occur. Error: The default transaction resource manager on volume"
...found:
Creating a quiesced snapshot of a Windows virtual machine generates Event IDs 50, 57, 137, 140, 157, or 12289 (2006849)
https://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=20068...
...which supposedly links to some MS KB articles, but one of them goes nowhere.

And this might be worth a look at:
https://communities.vmware.com/thread/309844?start=15&tstart=0
...seems to contain some different solutions/workarounds.

[nbustarter380]

Thanks, for your quick responses

Netbackup Master Server is 7.7.2  running on Linux

its occurring on all windows VM backups. I will get more information for you

[Nicolai]

Has VMware tools been installed on the VMS's ?

VMware tools are essential for consistent backups.

[nbustarter380]

Thanks Nicolai,

Yes, the VMware tools have been installed on the VMs. Also, The Admins say that other backup vendor state the error can safely be ignored and wants to know if that also applies to netbackup.

Thanks

[nbustarter380]

Here is more information

NBU Master S.O -   REDHAT Linux  7   
NBU Master Version - Netbackup 7.7.3
NBU Media Version  - Netbackup 7.7.3
Policy Configurations  - VM backups  (We are using Intelligent Policies
Transport type: SAN / NBD...etc     (NBD)

[nbustarter380]

Here is more information

NBU Master S.O -   REDHAT Linux  7   
NBU Master Version - Netbackup 7.7.3
NBU Media Version  - Netbackup 7.7.3
Policy Configurations  - VM backups  (We are using Intelligent Policies
Transport type: SAN / NBD...etc     (NBD)

[DigPVB]

 As sdo pointed out, there is a kb for this issue from vmware. The event itself will usually appear when making a snapshot manually as well, and can be safely ignored. Contrary to what the errors in eventlog might say, no corruption will occur.

The facts are that an extra vmdk is created when a snapshot is made by netbackup. Windows OS will detect this snapshot disk as an "extra" disk.
When the snapshot is consolidated, vmware will "remove the disk" without any OS initialisation, causing all these errors, but contrary to the event descriptions, no data has been lost or corrupted.

TLDR: you can safely ignore these events

[nbustarter380]

Thanks for all your responses

DigPVB, Thanks  yes all research points the errors can be ignored.