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https://issues.apache.org/jira/browse/HBASE-7966?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13590248#comment-13590248
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Anoop Sam John commented on HBASE-7966:
---------------------------------------

[~enis] So this is a code level issue. Issue type of JIRA is marked as New 
Feature. You really mean it?

We have pre/post start master hooks now. But before postStartMaster() hook 
call, master's 'initialized' flag is set to true.  So we need a hook in middle 
of this. More clearly saying, a hook after the master init operations are over 
but before marking it as initialized (So that it can take client requests)
We had a similar need and we added a new hook I think.. Let me see the code.
                
> ACL tests fail on trunk (flaky)
> -------------------------------
>
>                 Key: HBASE-7966
>                 URL: https://issues.apache.org/jira/browse/HBASE-7966
>             Project: HBase
>          Issue Type: New Feature
>          Components: security
>            Reporter: Enis Soztutar
>            Assignee: Enis Soztutar
>             Fix For: 0.95.0, 0.98.0
>
>
> I've noticed that these tests fail for me quite frequently:
> {code}
>   org.apache.hadoop.hbase.security.access.TestTablePermissions: 
> org.apache.hadoop.hbase.exceptions.TableNotFoundException: _acl_
>   
> testQualifierAccess(org.apache.hadoop.hbase.security.access.TestAccessControlFilter):
>  org.apache.hadoop.hbase.exceptions.TableNotFoundException: _acl_
> {code}
> The root cause seems to be that, the AccessController only creates the table 
> in HMaster.postStartMaster(), but before _acl_ is created, master start 
> accepting other create table requests, hence race. 

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