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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-8928) Add ability to reset topologies on master nodes
Date Sat, 02 May 2015 20:01:10 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-8928?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14525443#comment-14525443
] 

Hadoop QA commented on HADOOP-8928:
-----------------------------------

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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:red}-1{color} | patch |   0m  0s | The patch command could not apply the patch during
dryrun. |
\\
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|| Subsystem || Report/Notes ||
| Patch URL | http://issues.apache.org/jira/secure/attachment/12729963/HADOOP-8928.patch |
| Optional Tests | javadoc javac unit findbugs checkstyle |
| git revision | trunk / 6ae2a0d |
| Console output | https://builds.apache.org/job/PreCommit-HADOOP-Build/6420/console |


This message was automatically generated.

> Add ability to reset topologies on master nodes
> -----------------------------------------------
>
>                 Key: HADOOP-8928
>                 URL: https://issues.apache.org/jira/browse/HADOOP-8928
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: net
>    Affects Versions: 3.0.0, 2.0.2-alpha
>            Reporter: Shinichi Yamashita
>         Attachments: HADOOP-8928.patch, HADOOP-8928.txt
>
>
> For a topology decision of DataNode and TaskTracker, ScriptBasedMapping (probably TableMapping)
confirms HashMap first.
> To decide topology of DataNode and TaskTracker again, it is necessary to restart NameNode
and JobTracker.
> Therefore, it is necessary to change (or clear) HashMap function without restarting NameNode
and JobTracker.



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