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https://issues.apache.org/jira/browse/MAPREDUCE-4693?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13583450#comment-13583450
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Siddharth Seth commented on MAPREDUCE-4693:
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bq. ... and the counters is converted to jobhistory.JhCounters while
serializing.
Storing the counters as org.apache.hadoop.mapreduce.Counters is to prevent a
duplicate copy of the counters till they're actually serialized.... that's the
getDatum() method. (MAPREDUCE-3511)
Other than this one change and a couple of minor formatting fixes, the patch
looks good.
> Historyserver should provide counters for failed tasks
> ------------------------------------------------------
>
> Key: MAPREDUCE-4693
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-4693
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: jobhistoryserver, mrv2
> Affects Versions: 2.0.3-alpha, 0.23.6
> Reporter: Jason Lowe
> Assignee: Xuan Gong
> Labels: usability
> Attachments: MAPREDUCE-4693.1.patch, MAPREDUCE-4693.2.patch
>
>
> Currently the historyserver is not providing counters for failed tasks, even
> though they are available via the AM as long as the job is still running.
> Those counters are lost when the client needs to redirect to the
> historyserver after the job completes.
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