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https://issues.apache.org/jira/browse/HADOOP-15223?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16365048#comment-16365048
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Akira Ajisaka commented on HADOOP-15223:
----------------------------------------

Thanks [~zhenyi] for the update. The patch cannot be applied to trunk. Would 
you rebase the patch?

> Replace Collections.EMPTY_SET and EMPTY_MAP with emptySet() and emptyMap() 
> when available
> -----------------------------------------------------------------------------------------
>
>                 Key: HADOOP-15223
>                 URL: https://issues.apache.org/jira/browse/HADOOP-15223
>             Project: Hadoop Common
>          Issue Type: Bug
>            Reporter: Akira Ajisaka
>            Assignee: fang zhenyi
>            Priority: Minor
>              Labels: newbie
>         Attachments: HADOOP-15223.001.patch, HADOOP-15223.002.patch
>
>
> The use of {{Collections.EMPTY_SET}} and {{Collections.EMPTY_MAP}} often 
> causes unchecked assignment and it should be replaced with 
> {{Collections.emptySet()}} and {{Collections.emptyMap()}}. 



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