In a non-DNS NetBackup Flex Scale setup, performing a backup from a snapshot operation fails for NAS-Data-Protection policy

The issue occurs in a NetBackup Flex Scale environment when DNS entries are not present for the NetBackup Flex Scale nodes and there is only one backup host (NetBackup Flex Scale node) specified in the backup host pool. In such a scenario, snapshot operation fails for a NAS-Data-Protection policy. (4065603)

Workaround:

While creating a backup host pool, select at least two NetBackup Flex Scale nodes as part of the backup host pool.