Add log guard for a debug message in ReduceTask
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Key: MAPREDUCE-3394
URL: https://issues.apache.org/jira/browse/MAPREDUCE-3394
Project: Hadoop Map/Reduce
Issue Type: Improvement
Components: task
Affects Versions: 0.20.205.0
Reporter: Todd Lipcon
Assignee: Todd Lipcon
Priority: Trivial
Attachments: mr-3394.txt
There's a LOG.debug message in ReduceTask that stringifies a task ID and uses a
non-negligible amount of CPU in some cases. We should guard it with
{{isDebugEnabled}}
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