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https://issues.apache.org/jira/browse/HBASE-7066?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13489867#comment-13489867
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Francis Liu commented on HBASE-7066:
------------------------------------

return vs exceptions: The problem with both is that it'll leak security code 
into core. Though with exceptions there's a workaround with inheriting core 
classes/interfaces. Which makes Stack's suggestion much more viable.
                
> Some HMaster coprocessor exceptions are being swallowed in try catch blocks
> ---------------------------------------------------------------------------
>
>                 Key: HBASE-7066
>                 URL: https://issues.apache.org/jira/browse/HBASE-7066
>             Project: HBase
>          Issue Type: Bug
>          Components: Coprocessors, security
>    Affects Versions: 0.94.2, 0.96.0
>            Reporter: Francis Liu
>            Assignee: Francis Liu
>            Priority: Critical
>         Attachments: HBASE-7066_94.patch, HBASE-7066_trunk.patch, 
> HBASE-7066_trunk.patch
>
>
> This is causing HMaster.shutdown() and HMaster.stopMaster() to succeed even 
> when an AccessDeniedException is thrown.

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