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https://issues.apache.org/jira/browse/HADOOP-10566?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Arpit Agarwal updated HADOOP-10566:
-----------------------------------

          Resolution: Fixed
       Fix Version/s: 2.5.0
                      3.0.0
    Target Version/s: 2.5.0
              Status: Resolved  (was: Patch Available)

I committed this to branch-2.

> Refactor proxyservers out of ProxyUsers
> ---------------------------------------
>
>                 Key: HADOOP-10566
>                 URL: https://issues.apache.org/jira/browse/HADOOP-10566
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: security
>    Affects Versions: 2.4.0
>            Reporter: Benoy Antony
>            Assignee: Benoy Antony
>             Fix For: 3.0.0, 2.5.0
>
>         Attachments: HADOOP-10566-branch-2.patch, HADOOP-10566.patch, 
> HADOOP-10566.patch, HADOOP-10566.patch, HADOOP-10566.patch, HADOOP-10566.patch
>
>
> HADOOP-10498 added proxyservers feature in ProxyUsers. It is beneficial to 
> treat this as a separate feature since 
> 1> The ProxyUsers is per proxyuser where as proxyservers is per cluster. The 
> cardinality is different. 
> 2> The ProxyUsers.authorize() and ProxyUsers.isproxyUser() are synchronized 
> and hence share the same lock  and impacts performance.
> Since these are two separate features, it will be an improvement to keep them 
> separate. It also enables one to fine-tune each feature independently.



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