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https://issues.apache.org/jira/browse/HADOOP-10539?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13980222#comment-13980222
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Andrew Purtell commented on HADOOP-10539:
-----------------------------------------

Reflection will be a perf hit.

> Provide backward compatibility for ProxyUsers.authorize() call
> --------------------------------------------------------------
>
>                 Key: HADOOP-10539
>                 URL: https://issues.apache.org/jira/browse/HADOOP-10539
>             Project: Hadoop Common
>          Issue Type: Improvement
>            Reporter: Benoy Antony
>            Assignee: Benoy Antony
>            Priority: Minor
>         Attachments: HADOOP-10539.patch, HADOOP-10539.patch
>
>
> HADOOP-10499  removed the unused _Configuration_ parameter from 
> _ProxyUsers.authorize()_  method. 
> This broke few components like HBase who invoked that function and forced it 
> to rely on Reflection.



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