Backup operation fails with error 6654

This error is encountered during the following scenarios:

If NetBackup for Hadoop credentials are not added in NetBackup primary server.
Workaround:
Ensure that the NetBackup for Hadoop credentials are added in NetBackup primary server. Use the tpconfig command. For more information, See Adding NetBackup for Hadoop credentials in NetBackup.
If NetBackup for Hadoop plug-in files are not installed on backup host.
Workaround:
Ensure that the NetBackup for Hadoop plug-in files are installed on all backup hosts before you begin backup operation.
If a NetBackup client that is used as a backup host is not allowlisted.
Workaround:
Ensure that the NetBackup client that is used as a backup host is allowlisted before you begin backup operation.
See Including a NetBackup client on NetBackup primary server allowed list.