With JVM reuse, JvmManager doesn't delete last workdir properly
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Key: MAPREDUCE-2268
URL: https://issues.apache.org/jira/browse/MAPREDUCE-2268
Project: Hadoop Map/Reduce
Issue Type: Bug
Components: tasktracker
Reporter: Todd Lipcon
Assignee: Todd Lipcon
Priority: Blocker
Fix For: 0.22.0
In JvmManager, when a Jvm exits, it tries to delete the workdir for
{{initalContext.task}} which is null, hence throwing NPE. Currently this NPE is
swallowed into the abyss.
We should catch exceptions out of the JvmRunner thread, add a test case that
verifies this functionality, and fix this code to properly grab the last task.
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