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From "Eric Payne (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-6144) DefaultSpeculator always add both MAP and REDUCE Speculative task even MAP_SPECULATIVE or REDUCE_SPECULATIVE is disabled.
Date Thu, 30 Oct 2014 14:16:33 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-6144?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14190106#comment-14190106
] 

Eric Payne commented on MAPREDUCE-6144:
---------------------------------------

[~zxu], thanks for posting this patch.
+1 (non-binding)

> DefaultSpeculator always add both MAP and REDUCE Speculative task even MAP_SPECULATIVE
or REDUCE_SPECULATIVE is disabled.
> -------------------------------------------------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-6144
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-6144
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: mrv2
>    Affects Versions: 2.5.1
>            Reporter: zhihai xu
>            Assignee: zhihai xu
>         Attachments: MAPREDUCE-6144.000.patch, MAPREDUCE-6144.001.patch
>
>
> DefaultSpeculator always add both MAP and REDUCE Speculative task even MAP_SPECULATIVE
or REDUCE_SPECULATIVE is disabled.
> If both MAP_SPECULATIVE and REDUCE_SPECULATIVE are disabled, 
> DefaultSpeculator won't start.
> The issue will happen if only one of MAP_SPECULATIVE and REDUCE_SPECULATIVE is enabled,
both MAP and REDUCE Speculative task  are generate.



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