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https://issues.apache.org/jira/browse/HADOOP-3424?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Chris Douglas updated HADOOP-3424:
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    Fix Version/s: 0.18.0
           Status: Patch Available  (was: Open)

> the value returned from getPartition should be checked to make sure it is in 
> the range 0..#reduces-1
> ----------------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-3424
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3424
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: mapred
>    Affects Versions: 0.17.0
>            Reporter: Owen O'Malley
>            Assignee: Chris Douglas
>             Fix For: 0.18.0
>
>         Attachments: 3424-0.patch
>
>
> Since HADOOP-2919, map tasks haven't complained if getPartition returns 
> numbers outside of the valid range. This leads to applications where some of 
> the transient output is ignored (all of the rows marked for reduce -1, for 
> example, are discarded, because reduce -1 doesn't exist.)

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