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https://issues.apache.org/jira/browse/MAPREDUCE-3384?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14533820#comment-14533820
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Akira AJISAKA commented on MAPREDUCE-3384:
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I'm thinking adding warning message only in
org.apache.hadoop.mapreduce.lib.reduce.LongSumReducer is inconsistent. We need
to add warning messages in the following classes as well.
* org.apache.hadoop.mapred.lib.LongSumReducer
* org.apache.hadoop.mapreduce.lib.reduce.IntSumReducer
> 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
> Labels: BB2015-05-TBR
> 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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