[HADOOP-4161] [HOD] Uncaught exceptions can potentially hang hod-client.

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.18.1
• Component/s: contrib/hod
• Assignee: Vinod Kumar Vavilapalli Assign to me
• Reporter: Vinod Kumar Vavilapalli
• Created: 11/Sep/08 09:32
• Updated: 18/Sep/08 17:55
• Resolved: 11/Sep/08 19:41

Description

In hod-client, we have

sys.exit(hod.operation())
sys.exit(hod.script())

sys.exit(opCode) makes sure that the client is truly cleaned up, killing unjoined threads etc. So, exceptions not caught by hodRunner.operation() or hodRunner.script(), will by-pass sys.exit method and thus can potentially hang hod-client.

For e.g., when hod allocate fails after allocation and before service-registry thread is cleaned up, hod client will hang.