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https://issues.apache.org/jira/browse/HADOOP-2961?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12600684#action_12600684
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Hemanth Yamijala commented on HADOOP-2961:
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The patch does not work. It throws a KeyError in bin/ringmaster if no tarball 
is specified, because we are assuming it will be available in the patched code.


> [HOD] Hod expects port info though external host is not mentioned.
> ------------------------------------------------------------------
>
>                 Key: HADOOP-2961
>                 URL: https://issues.apache.org/jira/browse/HADOOP-2961
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: contrib/hod
>    Affects Versions: 0.16.0
>            Reporter: Hemanth Yamijala
>            Assignee: Vinod Kumar Vavilapalli
>            Priority: Minor
>             Fix For: 0.18.0
>
>         Attachments: HADOOP-2961
>
>
> When external host is not specified in gridservice-mapred or hdfs sections, 
> there is no point in HOD validating the port numbers or hostnames.

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