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From "Brahma Reddy Battula (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-3384) Add warning message for org.apache.hadoop.mapreduce.lib.reduce.LongSumReducer
Date Mon, 08 Jun 2015 11:44:00 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-3384?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14577063#comment-14577063
] 

Brahma Reddy Battula commented on MAPREDUCE-3384:
-------------------------------------------------

[~devaraj.k] thanks a lot for your review.. Attached the patch to address the above comments..
kindly review!! 

Following two classes are not addressed 

{{org.apache.hadoop.mapreduce.lib.aggregate.LongValueSum}}
{{org.apache.hadoop.mapreduce.lib.aggregate.DoubleValueSum}}

> 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
>            Assignee: Brahma Reddy Battula
>         Attachments: MAPREDUCE-3384-002.patch, MAPREDUCE-3384-003.patch, 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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