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https://issues.apache.org/jira/browse/MAPREDUCE-3867?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13209018#comment-13209018
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Alejandro Abdelnur commented on MAPREDUCE-3867:
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Mini* should obtain and use a free port (like in pre 0.23).
> MiniMRYarn/MiniYarn use fixed ports
> -----------------------------------
>
> Key: MAPREDUCE-3867
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-3867
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: test
> Affects Versions: 0.24.0, 0.23.2
> Reporter: Alejandro Abdelnur
>
> This presents issues if there are other processes using those ports. Also, if
> multitasking among dev environments using Mini* things start to fail.
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