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https://issues.apache.org/jira/browse/MAPREDUCE-5036?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13679564#comment-13679564
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Tom White commented on MAPREDUCE-5036:
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bq. The title doesnt reflect the change in the patch.
The port was originally 8080, so I left the description the same so that it
made sense for users reading the change log.
How about we do another update in this JIRA to change the default port to 0 as
Vinod suggested?
> Default shuffle handler port should not be 8080
> -----------------------------------------------
>
> Key: MAPREDUCE-5036
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-5036
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Affects Versions: 2.0.3-alpha
> Reporter: Sandy Ryza
> Assignee: Sandy Ryza
> Fix For: 2.1.0-beta
>
> Attachments: MAPREDUCE-5036-13562.patch, MAPREDUCE-5036.patch
>
>
> The shuffle handler port (mapreduce.shuffle.port) defaults to 8080. This is
> a pretty common port for web services, and is likely to cause unnecessary
> port conflicts.
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