[MAPREDUCE-5533] Speculative execution does not function for reduce

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.2.0
• Component/s: applicationmaster
• Target Version/s: 2.2.0
• Hadoop Flags: Reviewed
• Assignee: Xuan Gong
• Reporter: Tassapol Athiapinya
• Created: 25/Sep/13 05:15
• Updated: 30/Jun/15 07:14
• Resolved: 04/Oct/13 17:30

Description

We have sort job where reduce attempt does not send heartbeat in timely manner to application master. The AM should kick off another attempt to let job succeeds. What we find is the job fails and there is no speculation happening.