Yang Hao created MAPREDUCE-6229:
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Summary: finished MapReduce tasks may be re executed when AM fails
on recovery process
Key: MAPREDUCE-6229
URL: https://issues.apache.org/jira/browse/MAPREDUCE-6229
Project: Hadoop Map/Reduce
Issue Type: Bug
Affects Versions: 2.6.0
Reporter: Yang Hao
MapReduce AM failovers, and suddently it is killed during recovery. Next time
when the AM failovers again, the progress will lose for that it only parses
previous history file. As a result, many tasks will be reexecuted.
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