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https://issues.apache.org/jira/browse/MAPREDUCE-6958?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16168577#comment-16168577
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Chris Douglas commented on MAPREDUCE-6958:
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Sorry to ask for revs on this kind of patch, but this changes the format of the
audit log in a way that might break downstream consumers. The mapIds are
printed after the reducer in the revised version. Could this keep the format
as-is, with the length appended?
The shuffle sizes used to be available in the clienttrace log. Was that removed
from the ShuffleHandler at some point?
> Shuffle audit logger should log size of shuffle transfer
> --------------------------------------------------------
>
> Key: MAPREDUCE-6958
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-6958
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Reporter: Jason Lowe
> Assignee: Jason Lowe
> Priority: Minor
> Attachments: MAPREDUCE-6958.001.patch, MAPREDUCE-6958.002.patch
>
>
> The shuffle audit logger currently logs the job ID and reducer ID but nothing
> about the size of the requested transfer. It calculates this as part of the
> HTTP response headers, so it would be trivial to log the response size. This
> would be very valuable for debugging network traffic storms from the shuffle
> handler.
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