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Posted to mapreduce-issues@hadoop.apache.org by "JiangKai (Updated) (JIRA)" <ji...@apache.org> on 2011/11/09 10:33:51 UTC

[jira] [Updated] (MAPREDUCE-3384) Add warning message for org.apache.hadoop.mapreduce.lib.reduce.LongSumReducer

     [ https://issues.apache.org/jira/browse/MAPREDUCE-3384?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

JiangKai updated MAPREDUCE-3384:
--------------------------------

    Attachment: MAPREDUCE-3384.patch
    
> Add warning message for org.apache.hadoop.mapreduce.lib.reduce.LongSumReducer
> -----------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-3384
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3384
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>            Reporter: JiangKai
>            Priority: Minor
>             Fix For: 0.24.0
>
>         Attachments: MAPREDUCE-3384.patch
>
>
> When we call the function reduce() of LongSumReducer,the result may overflow.
> We should send a warning message to users if overflow occurs.

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