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https://issues.apache.org/jira/browse/YARN-3024?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14285270#comment-14285270
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Chengbing Liu commented on YARN-3024:
-------------------------------------

[~xgong] Could you please review the changed logic described in my last 
comment? This patch will save at least one second for each localization process.

> LocalizerRunner should give DIE action when all resources are localized
> -----------------------------------------------------------------------
>
>                 Key: YARN-3024
>                 URL: https://issues.apache.org/jira/browse/YARN-3024
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: nodemanager
>    Affects Versions: 2.6.0
>            Reporter: Chengbing Liu
>            Assignee: Chengbing Liu
>         Attachments: YARN-3024.01.patch, YARN-3024.02.patch, 
> YARN-3024.03.patch
>
>
> We have observed that {{LocalizerRunner}} always gives a LIVE action at the 
> end of localization process.
> The problem is {{findNextResource()}} can return null even when {{pending}} 
> was not empty prior to the call. This method removes localized resources from 
> {{pending}}, therefore we should check the return value, and gives DIE action 
> when it returns null.



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