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https://issues.apache.org/jira/browse/MAPREDUCE-5648?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13850972#comment-13850972
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Sandy Ryza commented on MAPREDUCE-5648:
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Can we split this into two JIRAs, one for the speculation change and one for
the user-specified reason? I think the former is likely to be far less
controversial than the latter.
> Allow user-specified diagnostics and speculation diagnostics for killed tasks
> -----------------------------------------------------------------------------
>
> Key: MAPREDUCE-5648
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-5648
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Components: client, mr-am, mrv2
> Affects Versions: 2.2.0
> Reporter: Gera Shegalov
> Assignee: Gera Shegalov
> Attachments: MAPREDUCE-5648.v01.patch, Screen Shot 2013-11-23 at
> 11.12.15 AM.png
>
>
> Our users and tools want to be able to supply additional custom diagnostic
> messages to mapreduce ClientProtocol killTask.
> We also need to clearly indicate when a task attempt is killed because
> another task attempt succeeded first when speculative execution is enabled.
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