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From "Allen Wittenauer (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (MAPREDUCE-191) Mapper fail rate increases significantly as the number of reduces increase
Date Thu, 17 Jul 2014 16:57:06 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-191?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Allen Wittenauer resolved MAPREDUCE-191.
----------------------------------------

    Resolution: Cannot Reproduce

I'm going to close this out as stale.  I suspect this is no longer an issue.

> Mapper fail rate increases significantly as the number of reduces increase
> --------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-191
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-191
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>            Reporter: Runping Qi
>
> I ran a large sort job, with about 8400 mappers.
> In the first run, I used 301 reducers. About 600 mapper tasks failed.
> In another run, I used 607 reducers. More than 3800 mapper tasks failed.



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