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https://issues.apache.org/jira/browse/HBASE-20950?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16560452#comment-16560452
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Ted Yu commented on HBASE-20950:
--------------------------------

Looks good overall.
{code}
+      CLUSTER.join();
     }
-    CLUSTER.join();
{code}
I am a bit curious - why moving the join call outside the if ?

> Helper method to configure secure DFS cluster for tests
> -------------------------------------------------------
>
>                 Key: HBASE-20950
>                 URL: https://issues.apache.org/jira/browse/HBASE-20950
>             Project: HBase
>          Issue Type: Sub-task
>          Components: test
>    Affects Versions: 3.0.0
>            Reporter: Wei-Chiu Chuang
>            Assignee: Wei-Chiu Chuang
>            Priority: Major
>         Attachments: HBASE-20950.master.001.patch
>
>
> There is quite some boilerplate code for configuring a secure HDFS cluster 
> for tests. The code is repeated in a number of test files within HBase code 
> base. Convert the boilerplate code into a helper method to avoid duplication 
> and lower maintenance effort.
> SecureTestCluster#setHdfsSecuredConfiguration
> TestSecureExport#setUpClusterKdc
> TestThriftSpnegoHttpServer#addSecurityConfigurations
> TestSaslFanOutOneBlockAsyncDFSOutput#setHdfsSecuredConfiguration



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