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https://issues.apache.org/jira/browse/MAPREDUCE-6487?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14943966#comment-14943966
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André Santos commented on MAPREDUCE-6487:
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The solutions is to copy the behaviour of MapOutputBuffer class for the
mapOutputByteCounter?
> TaskCounter.MAP_OUTPUT_BYTES is 0 for map-only jobs
> ---------------------------------------------------
>
> Key: MAPREDUCE-6487
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-6487
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: task
> Reporter: Laurent Goujon
> Assignee: nijel
>
> It looks like DirectMapOutputCollector (used by Map-only jobs) doesn't update
> TaskCounter.MAP_OUTPUT_BYTES although it updates
> TaskCounter.MAP_OUTPUT_RECORDS.
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