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From "Tassapol Athiapinya (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-5533) Speculative execution does not function for reduce
Date Mon, 30 Sep 2013 03:42:27 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-5533?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13781599#comment-13781599
] 

Tassapol Athiapinya commented on MAPREDUCE-5533:
------------------------------------------------

I have 8-12 reducers in this job.

> 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
>
>
> 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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