Robert Joseph Evans created MAPREDUCE-4647:
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Summary: We should only unjar jobjar if there is a lib directory
in it.
Key: MAPREDUCE-4647
URL: https://issues.apache.org/jira/browse/MAPREDUCE-4647
Project: Hadoop Map/Reduce
Issue Type: Improvement
Components: mrv2
Affects Versions: 0.23.3
Reporter: Robert Joseph Evans
Assignee: Robert Joseph Evans
For backwards compatibility we recently added made is so we would unjar the
job.jar and add anything to the classpath in the lib directory of that jar.
But this also slows job startup down a lot if the jar is large. We should only
unjar it if actually doing so would add something new to the classpath.
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