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https://issues.apache.org/jira/browse/HADOOP-5871?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12710700#action_12710700
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Steve Loughran commented on HADOOP-5871:
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I am +1 to this, because you can't turn ipv6 off the latest ubuntu release.
http://www.1060.org/blogxter/entry?publicid=DEDC82E94310CA8318C5E4E83DE3C70D
> MiniMRCluster should point TaskTracker's http URL to the loopback address.
> --------------------------------------------------------------------------
>
> Key: HADOOP-5871
> URL: https://issues.apache.org/jira/browse/HADOOP-5871
> Project: Hadoop Core
> Issue Type: Bug
> Components: mapred
> Reporter: Vinod K V
> Attachments: HADOOP-5871.txt
>
>
> It currently sets mapred.task.tracker.http.address to 0.0.0.0:0 and so every
> TT startup in MiniMRCluster makes a trip to DNS. Changing it to 127.0.0.1:0
> decreases 5 seconds for every TT start-up on my local box.
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