PMAC Software Upgrade from Release 6.x to R6.4 failed due to error umount: /var/TKLC/smac/backup: device is busy

Asset ID:	1-72-2343014.1
Update Date:	2018-01-16
Keywords:

Solution Type Problem Resolution Sure

Solution 2343014.1 : PMAC Software Upgrade from Release 6.x to R6.4 failed due to error umount: /var/TKLC/smac/backup: device is busy

Applies to:

Oracle Communications Diameter Signaling Router (DSR) - Version DSR 7.0 to DSR 8.1.0 [Release DSR 7.0 to DSR 8.0]
Information in this document applies to any platform.

Symptoms

Software Details:
============
- Source PMAC Release: 6.0.3.0.2_60.28.0
- PMAC Release: PMAC-6.4.0.0.0_64.8.0
- DSR Release upgrade from 7.2 to 8.1

Error Information:

=============

From Upgrade logs (/var/TKLC/log/upgrade/upgrade.log)

1513030735:: CMD: '/bin/umount' '/var/TKLC/smac/backup'
1513030735:: RC: 1
1513030735:: SIGNAL: 0
1513030735:: CORE: no
1513030735::<<< CMD OUTPUT >>>
1513030735::umount: /var/TKLC/smac/backup: device is busy.
1513030735::
1513030735:: (In some cases useful info about processes that use
1513030735::
1513030735:: the device is found by lsof(8) or fuser(1))
1513030735::
1513030735::<<< END OF CMD OUTPUT >>>

Cause

This could be caused if customer has backup schedule on the same time when upgrade is performed or due to a hung thread running a backup.

Solution

1. Please, make sure schedule backup is NOT in the current window when the upgrade is being performed. This need to be check at the GUI:

- $ Main Menu->Administration->PM&C Backup->Manage Backup

2. Look at the backup time to verify the schedule is not during the upgrade.

3. It can also be possible that there is a hung thread running a backup. You can check this using the following commands

- $ lsof | grep /var/TKLC/smac/backup
- $ fuser -mv /var/TKLC/smac/backup

4. If there is no output for above two commands, please stop here and contact Support.

5. If there an output, will look like following example:

[root@pmacu161 ~]# lsof | grep /var/TKLC/smac/backup

bash 17353 root cwd DIR 253,9 4096 2 /var/TKLC/smac/backup

[root@pmacu161 ~]# fuser -mv /var/TKLC/smac/backup

USER PID ACCESS COMMAND

/var/TKLC/smac/backup:

root 17353 ..c.. bash

6. The PID in above example is 17353

7. You can kill this PID by running the following command

- $ fuser -k /var/TKLC/smac/backup

8. Restart the Upgrade.

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