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https://issues.apache.org/jira/browse/MAPREDUCE-7402?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18023936#comment-18023936
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ASF GitHub Bot commented on MAPREDUCE-7402:
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github-actions[bot] closed pull request #6622: MAPREDUCE-7402. fix 
mapreduce.task.io.sort.factor=1 lead to an infinite loop.
URL: https://github.com/apache/hadoop/pull/6622




> fix mapreduce.task.io.sort.factor=1 lead to an infinite loop.
> -------------------------------------------------------------
>
>                 Key: MAPREDUCE-7402
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-7402
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>            Reporter: Jian Zhang
>            Priority: Minor
>              Labels: pull-request-available
>         Attachments: screenshot-1.png
>
>
> *Describe:*
>     In the method long computeBytesInMerges(int factor, int inMem), when 
> factor is set to 1, and the initial numSegments>1, inMem=0, it will cause an 
> infinite loop of while. Although setting factor to 1 is meaningless, and it 
> will not be done in actual production, we need to remind users to avoid an 
> infinite loop due to carelessness.
>  !screenshot-1.png|width=600,height=400!
> *How to reproduce:*
>     This bug can easily occur by setting 
> configuration.set("mapreduce.task.io.sort.factor", "1").



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