Symptoms

OA tasks fail with the error:

The last execution was "Destination host_id #43 : Internal error: Unknown unexpected exception raised."

Cause

Insufficient resources on OA Management Node.

Resolution

  1. Check memory usage on OA Management Node:

    # free -mtl
total       used       free     shared    buffers     cached
Mem:          4096       4066         29          0          0        321
Low:          4096       4066         29
High:            0          0          0
-/+ buffers/cache:       3745        350
Swap:         8192         77       8114
Total:       12288       4144       8143

  2. If memory usage is high, restart pem service using the command:

    # service pem restart
  3. Increase memory allocated to OA MN to prevent such issues in future.

Internal content