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https://issues.apache.org/jira/browse/MAPREDUCE-5533?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Vinod Kumar Vavilapalli updated MAPREDUCE-5533:
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Attachment: MAPREDUCE-5533.6.patch
Same patch as Xuan's with the following modifications
- Changed the waiting time to be 9 secs on 3 task-heartbeats
- Added lots of java comments
- Renamed variables/methods for better readability
- Fixed formatting
- Refactored test to not duplicate code
- Increased test timeout so that it doesn't fail randomly due to timeouts
Will check this in when Jenkins says okay.
> Speculative execution does not function for reduce
> --------------------------------------------------
>
> Key: MAPREDUCE-5533
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-5533
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: applicationmaster
> Reporter: Tassapol Athiapinya
> Assignee: Xuan Gong
> Attachments: MAPREDUCE-5533.1.patch, MAPREDUCE-5533.2.patch,
> MAPREDUCE-5533.3.patch, MAPREDUCE-5533.4.patch, MAPREDUCE-5533.5.patch,
> MAPREDUCE-5533.6.patch
>
>
> We have sort job where reduce attempt does not send heartbeat in timely
> manner to application master. The AM should kick off another attempt to let
> job succeeds. What we find is the job fails and there is no speculation
> happening.
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