Multiple snapshot jobs fail with code 156 or 1541.

Multiple snapshot jobs that were started at a high frequency fail with code 156 or 1541.

These errors may occur in a situation when an administrator manually (or by using a script), starts multiple snapshot jobs at a high frequency. (For example, one snapshot job every 5 seconds.)

At the same time, multiple rotation processes begin. The processes operate on the same catalog information, which includes information about existing snapshots. Because the processes work on the same information at the same time, a problem of inconsistency can occur. Some of the processes delete the snapshots and update the catalog while other processes continue to refer to the obsolete information. The result is that the snapshot jobs can end with status codes 156 (snapshot error encountered), 1541 (snapshot creation failed), or other unpredictable errors.

This behavior does not occur for scheduled snapshot jobs, as NetBackup controls the job execution.