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https://issues.apache.org/jira/browse/HDFS-16259?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Stephen O'Donnell resolved HDFS-16259.
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    Resolution: Fixed

Thanks for the review [~weichiu] and the discussion on this [~ayushtkn]

> Catch and re-throw sub-classes of AccessControlException thrown by any 
> permission provider plugins (eg Ranger)
> --------------------------------------------------------------------------------------------------------------
>
>                 Key: HDFS-16259
>                 URL: https://issues.apache.org/jira/browse/HDFS-16259
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: namenode
>            Reporter: Stephen O'Donnell
>            Assignee: Stephen O'Donnell
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 3.4.0, 3.3.2
>
>          Time Spent: 40m
>  Remaining Estimate: 0h
>
> When a permission provider plugin is enabled (eg Ranger) there are some 
> scenarios where it can throw a sub-class of an AccessControlException (eg 
> RangerAccessControlException). If this exception is allowed to propagate up 
> the stack, it can give problems in the HDFS Client, when it unwraps the 
> remote exception containing the AccessControlException sub-class.
> Ideally, we should make AccessControlException final so it cannot be 
> sub-classed, but that would be a breaking change at this point. Therefore I 
> believe the safest thing to do, is to catch any AccessControlException that 
> comes out of the permission enforcer plugin, and re-throw an 
> AccessControlException instead.



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