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https://issues.apache.org/jira/browse/YARN-1887?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13950364#comment-13950364
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Tsuyoshi OZAWA commented on YARN-1887:
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Overview of changes:
1. AppBlock has 3 methods: rencer(), getTBocy(), and getAppsTableData(). 
render() callbacks getTBody() and getAppsTableData().
2. FairSchedulerAppsBlock overrides getTBody() and getAppsTableData().

> FairSchedulerAppsBlock and AppsBlock duplicate much code
> --------------------------------------------------------
>
>                 Key: YARN-1887
>                 URL: https://issues.apache.org/jira/browse/YARN-1887
>             Project: Hadoop YARN
>          Issue Type: Bug
>            Reporter: Zhijie Shen
>            Assignee: Tsuyoshi OZAWA
>         Attachments: YARN-1887.1.patch
>
>
> Either now or after YARN-1809, FairSchedulerAppsBlock and AppsBlock duplicate 
> much code. Ideally, FairSchedulerAppsBlock should extends AppsBlock to reuse 
> most code, and override the method of creating app table headers and rows



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