TaskTrackerInstrumentation and JobTrackerInstrumentation should be public
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Key: MAPREDUCE-2043
URL: https://issues.apache.org/jira/browse/MAPREDUCE-2043
Project: Hadoop Map/Reduce
Issue Type: Improvement
Components: tasktracker
Affects Versions: 0.22.0
Reporter: Philip Zeyliger
Assignee: Philip Zeyliger
Attachments: MAPREDUCE-2043.patch.txt
Hadoop administrators can specify classes to be loaded as
"TaskTrackerInstrumentation" and "JobTrackerInstrumentation" implementations,
which, roughly, define listeners on TT and JT events. Unfortunately, since the
class has default access, extending it requires setting the extension's package
to org.apache.hadoop.mapred, which seems like poor form.
I propose we make the two instrumentation classes public, so they can be
extended wherever.
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