Flex web console Activity Monitor task "Recovering application instance" hangs at 25% when stopping or starting a NetBackup instance.

Problem

Flex web console Activity Monitor task "Recovering application instance" hangs at 25% when stopping or starting a NetBackup instance.
 

Error Message

None, but a hang occurs at 25%.
 

Cause

If a Flex instance's NetBackup services are stopped or started using netbackup stop/start or bp.kill_all/bp.start_all, the services are disconnected from systemd control.

• When this occurs, the Flex appliance console can no longer manage the NetBackup services.
• This condition can be confirmed from a SSH prompt on the NetBackup appliance via command: systemctl status netbackup
• If that command reports dead, the condition described exists.
   

Solution

Do not use these commands to manage NetBackup services on a Flex instance:

• netbackup start
• netbackup stop
• bp.start_all
• bp.kill_all

Instead, always use the following commands:

• systemctl status netbackup
• systemctl start netbackup
• systemctl stop netbackup

To resolve the hanging recovering application instance task:

1. Confirm the status of the NetBackup services from a SSH prompt while logged in as appadmin on the affected NetBackup instance by running the commands below:

systemctl status netbackup

     a) if services are running but the Active: status reports dead, then run:

systemctl start netbackup

     b) if services are stopped but the Active: status reports dead, then run:

systemctl stop netbackup

     c) After either action above, confirm the dead status is no longer reported by running:

systemctl status netbackup
 

2. At this point the hanging "Recovering application instance" status will change to failed and the appropriate commands can be used.