Gergo Repas created MAPREDUCE-6984:
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Summary: MR AM to clean up temporary files from previous attempt
Key: MAPREDUCE-6984
URL: https://issues.apache.org/jira/browse/MAPREDUCE-6984
Project: Hadoop Map/Reduce
Issue Type: Improvement
Components: applicationmaster
Affects Versions: 3.0.0-beta1
Reporter: Gergo Repas
When the MR AM restarts, the {outputDir}/_temporary/{appAttemptNumber}
directory remains on HDFS, even though this directory is not used during the
next attempt if the restart has been done without recovery. So if recovery is
not used for the AM restart, then the deletion of this directory can be done
earlier (at the start of the next attempt). The benefit is that more free HDFS
space is available for the next attempt.
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