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https://issues.apache.org/jira/browse/HADOOP-10470?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Benoy Antony resolved HADOOP-10470.
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Resolution: Duplicate
This will be resolved via changes in HADOOP-10448
> Change synchronization mechanism in ProxyUsers to readwrite lock
> ----------------------------------------------------------------
>
> Key: HADOOP-10470
> URL: https://issues.apache.org/jira/browse/HADOOP-10470
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: security
> Reporter: Benoy Antony
> Assignee: Benoy Antony
>
> Currently _ProxyUsers_ class achieve synchronization via _synchornized_.
> Performance on _ProxyUsers.authorize_ can be improved by replacing this with
> read/write lock.
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