Shuffle copiers do not return Codecs back to the pool at the end of shuffling
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Key: HADOOP-5493
URL: https://issues.apache.org/jira/browse/HADOOP-5493
Project: Hadoop Core
Issue Type: Bug
Components: mapred
Reporter: Devaraj Das
Assignee: Devaraj Das
Priority: Blocker
Fix For: 0.20.0
At the end of shuffle, the copiers should return back the codecs to the pool.
This doesn't happen and can potentially lead to a lot of memory leak on the
reduce task (depending on how many shuffle copiers there are).
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