After upgrading to DP 10.10/10.20, ALL AIX 7.1 clients backup were timed out and failed
[61:1002] The VBDA named "xxx [/var]" on host server1
reached its inactivity timeout of 900 seconds.
The agent on host will be shutdown.
With debugging enable, backup can complete successfully,
Problem was due to the Inter-process communication was timed out.
One possible reason for backups failing for non-debugging and working fine for debugging is that while debugging it takes time to write and meanwhile communication between processes happen properly.
Issue is expected to fix on DP 10.70
At the moment, apply the hotfix DP1020_b115_OCTIM19Q761761_HF1_ux