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