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From "Vinod Kumar Vavilapalli (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (MAPREDUCE-5533) Speculative execution does not function for reduce
Date Thu, 03 Oct 2013 23:41:42 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-5533?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Vinod Kumar Vavilapalli updated MAPREDUCE-5533:

    Status: Open  (was: Patch Available)

The changes looks fine to me given the current state of the speculation code. I think we need
to clean up this code a lot, but I'll file a separate ticket.

Making trivial changes myself - formatting, java comments etc.

> 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
> 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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