TaskRunner.prepare() and close() can be removed
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Key: MAPREDUCE-1662
URL: https://issues.apache.org/jira/browse/MAPREDUCE-1662
Project: Hadoop Map/Reduce
Issue Type: Bug
Components: tasktracker
Affects Versions: 0.22.0
Reporter: Amareshwari Sriramadasu
Fix For: 0.22.0
TaskRunner.prepare() and close() methods call only mapOutputFile.removeAll().
The removeAll() call is a always a no-op in prepare(), because the directory is
always empty during start up of the task. The removeAll() call in close() is
useless, because it is followed by a attempt directory cleanup. Since the map
output files are in attempt directory, the call to close() is useless.
After MAPREDUCE-842, these calls are under TaskTracker space, passing the wrong
conf. Now, the calls do not make sense at all.
I think we can remove the methods.
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