Provide a command line option to clean up jobtracker system directory
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Key: MAPREDUCE-803
URL: https://issues.apache.org/jira/browse/MAPREDUCE-803
Project: Hadoop Map/Reduce
Issue Type: Improvement
Components: jobtracker
Reporter: Hemanth Yamijala
When the JT is restarted, the mapreduce system directory's contents are used
for job recovery. For sites that use this feature, there might be instances
when we don't want to restart to read the mapred system directory. A sample use
case is if there is a full cluster restart with a (typically minor) version
upgrade of the Map/Reduce code base. To easily support such cases, it would be
nice to provide a way for clean up the jobtracker system directory so that no
files will be available for cleanup.
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