[MAPREDUCE-4252] MR2 job never completes with 1 pending task

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.23.1
• Fix Version/s: 0.23.3, 2.0.2-alpha
• Component/s: mrv2
• Target Version/s: 0.23.3, 2.0.0-alpha
• Assignee: Thomas White
• Reporter: Thomas White
• Created: 12/May/12 04:39
• Updated: 11/Oct/12 17:48
• Resolved: 10/Jul/12 16:12

Description

This was found by ATM:

I ran a teragen with 1000 map tasks. Many task attempts failed, but after 999 of the tasks had completed, the job is now sitting forever with 1 task "pending".

Issue Links

• relates to: MAPREDUCE-4607 Race condition in ReduceTask completion can result in Task being incorrectly failed