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https://issues.apache.org/jira/browse/HADOOP-4845?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12655823#action_12655823
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Arun C Murthy commented on HADOOP-4845:
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It would also be nice to remove a local counter for a same in
ReduceCopier.fetchOutputs which tracks the same value as the member
reduceInputBytes...
> 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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