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https://issues.apache.org/jira/browse/HBASE-6186?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andrew Purtell resolved HBASE-6186.
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Resolution: Invalid
> Assure thread safety
> --------------------
>
> Key: HBASE-6186
> URL: https://issues.apache.org/jira/browse/HBASE-6186
> Project: HBase
> Issue Type: Sub-task
> Components: security
> Affects Versions: 0.94.0, 0.94.1, 0.95.2
> Reporter: Andrew Purtell
> Labels: security
>
> Check data structures for necessary thread safety.
> One known issue is as follows:
> In TableAuthManager, we need to deal with concurrent grants and revokes now
> that ADMIN permission can be delegated to perhaps multiple users.
> Consider using a ReadWriteLock to protect for update. The current data
> structure is an array multimap. It is also possible to obtain a synchronized
> multimap from Guava with Multimaps#synchronizedListMultimap but by far the
> most common access is read access, and concurrent read access is fine.
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