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https://issues.apache.org/jira/browse/HADOOP-15223?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16363890#comment-16363890
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fang zhenyi edited comment on HADOOP-15223 at 2/14/18 12:58 PM:
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Thanks [~ajisakaa] for comments.I have remove all of 
{{Collections.EMPTY_MAP}},{{Collections.EMPTY_SET}} , 
{{Collections.emptyList()}} and unnecessary 
{{{{@SuppressWarning("unchecked")}}}} annotations.Hope you can review again, 
thanks a lot.


was (Author: zhenyi):
Thanks [~ajisakaa] for comments.I have remove all of 
\{{Collections.EMPTY_MAP}},\{{Collections.EMPTY_SET}} , 
\{{Collections.emptyList()}} and unnecessary 
{{{{@SuppressWarning("unchecked")}}}} annotations.Hope you can review again, 
thanks a lot.

> 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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