Shuffle counter issues
----------------------

                 Key: HADOOP-4845
                 URL: https://issues.apache.org/jira/browse/HADOOP-4845
             Project: Hadoop Core
          Issue Type: Bug
          Components: mapred
    Affects Versions: 0.20.0
            Reporter: Chris Douglas
             Fix For: 0.20.0


HADOOP-4749 added a new counter tracking the bytes shuffled into the reduce. It 
adds an accumulator to ReduceCopier instead of simply incrementing the new 
counter and did not define a human-readable value in 
src/mapred/org/apache/hadoop/mapred/Task_Counter.properties.

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