Hyper V Backup failing with 156

[Shasraj2]

Hello Guys,

 Iam getting the below error sicne 2 week .

- Check free space

- VSS are stable

- Snapshot is cleared.

0/08/2018 9:05:41 PM - Info bpbrm (pid=304951) Starting create snapshot processing
10/08/2018 9:05:43 PM - Info bpfis (pid=3368) Backup started
10/08/2018 9:07:25 PM - Critical bpbrm (pid=304951) from client <client name>: FTL - vfm_freeze_commit: method: Hyper-V_v2, type: FIM, function: Hyper-V_v2_make
10/08/2018 9:07:25 PM - Critical bpbrm (pid=304951) from client <client name>: FTL - snapshot services: snapshot creation failed: unknown error.
10/08/2018 9:07:25 PM - Critical bpbrm (pid=304951) from client <client name>: FTL - vfm_freeze_commit: method: Hyper-V_v2, type: FIM, function: Hyper-V_v2_make
10/08/2018 9:07:25 PM - Critical bpbrm (pid=304951) from client <client name>: FTL - snapshot services: snapshot creation failed: unknown error.
10/08/2018 9:07:26 PM - Critical bpbrm (pid=304951) from client <client name>: FTL - snapshot processing failed, status 156
10/08/2018 9:07:26 PM - Critical bpbrm (pid=304951) from client <client name>: FTL - snapshot creation failed, status 156
10/08/2018 9:07:26 PM - Warning bpbrm (pid=304951) from client <client name>: WRN - ALL_LOCAL_DRIVES is not frozen
10/08/2018 9:07:26 PM - Info bpfis (pid=3368) done. status: 156
10/08/2018 9:07:26 PM - end Hyper-V: Create Snapshot; elapsed time 2:01:48
10/08/2018 9:07:26 PM - Info bpfis (pid=3368) done. status: 156: snapshot error encountered
10/08/2018 9:08:39 PM - Info bpbrm (pid=306961) Starting delete snapshot processing
10/08/2018 9:08:40 PM - Info bpfis (pid=12044) Backup started
10/08/2018 9:08:59 PM - Critical bpbrm (pid=306961) from client <client name>: cannot open C:\Program Files\Veritas\NetBackup\online_util\fi_cntl\bpfis.fim.<client name>_1533891937.1.0
10/08/2018 9:09:01 PM - Info bpfis (pid=12044) done. status: 4207
10/08/2018 9:09:01 PM - end Hyper-V: Delete Snapshot; elapsed time 2:00:26
10/08/2018 9:09:01 PM - Info bpfis (pid=12044) done. status: 4207: Could not fetch snapshot metadata or state files
snapshot error encountered (156)

[Marianne]

Which OS and Hyper-V version? (It cannot be Windows 10.)

Have you created bpfis folder on the Hyper-V server? 
(I suggest level 3 log)

Have you checked Windows Event Viewer logs on the Hyper-V server? 

Also check Event Viewer Application log on the virtual Windows client for which the snapshot failed as per this TN:
https://www.veritas.com/support/en_US/article.000019515

[Lowell_Palecek]

For the bpfis log, also set the logging level under Windows Client / Client Settings to 2.

[Shasraj2]

Hi,

I cannot see the host in Client list , it is backing through Hyper-V policy (agentless)

[Marianne]

Bpfis log goes on the Hyper-V server where NBU is installed. (Please see the Troubleshooting section of NBU for Hyper-V guide).
Also check Windows Event Viewer logs on failing client.

[Shasraj2]

Thanks Marianne for looking into it .

I checked and found the machine is having Windows 8 os , I suspect its a desktop .