[MAPREDUCE-3846] Restarted+Recovered AM hangs in some corner cases

• Type: Sub-task
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 0.23.0
• Fix Version/s: 0.23.1
• Component/s: mrv2
• Hadoop Flags: Reviewed
• Release Note: Addressed MR AM hanging issues during AM restart and then the recovery.
• Assignee: Vinod Kumar Vavilapalli
• Reporter: Vinod Kumar Vavilapalli
• Created: 09/Feb/12 22:51
• Updated: 05/Mar/12 02:49
• Resolved: 14/Feb/12 00:14

Description

karams found this while testing AM restart/recovery feature. After the first generation AM crashes (manually killed by kill -9), the second generation AM starts, but hangs after a while.

Issue Links

• blocks: MAPREDUCE-3802 If an MR AM dies twice it looks like the process freezes
• is related to: MAPREDUCE-3802 If an MR AM dies twice it looks like the process freezes
• is related to: MAPREDUCE-3634 All daemons should crash instead of hanging around when their EventHandlers get exceptions