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From "Brahma Reddy Battula (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (MAPREDUCE-3384) Add warning message for underflow or overflow
Date Wed, 17 Jun 2015 14:09:01 GMT

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

Brahma Reddy Battula updated MAPREDUCE-3384:
--------------------------------------------
    Status: Patch Available  (was: Open)

> Add warning message for underflow or overflow
> ---------------------------------------------
>
>                 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-3384-004.patch,
MAPREDUCE-3384.patch
>
>
> When we call the function reduce() of LongSumReducer,the result may overflow or underflow.
> We should have a warning message to users if overflow/underflow occurs for all these
classes,
> {code:xml}
> /java/org/apache/hadoop/mapred/lib/LongSumReducer.java
>  .../apache/hadoop/mapreduce/lib/reduce/IntSumReducer.java
>  .../apache/hadoop/mapreduce/lib/reduce/LongSumReducer.java
>  .../test/java/org/apache/hadoop/fs/AccumulatingReducer.java
>  .../hadoop/mapred/nativetask/kvtest/HashSumReducer.java
> {code}



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