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https://issues.apache.org/jira/browse/HDFS-11079?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15630303#comment-15630303
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Mingliang Liu commented on HDFS-11079:
--------------------------------------

You're correct [~arpitagarwal] I just had a look at the code and found a few 
places in the unit tests that restart the NN, checkpoint, and etc. It's very 
likely the cluster is left with a bad state.

Let's simply keep the individual cluster as it is. That's said, we don't need 
the {{refreshClusterState();}} after we build a brand new cluster in 
{{setUp()}}.

> Accelerate TestQuotaByStorageType using shared MiniDFSCluster
> -------------------------------------------------------------
>
>                 Key: HDFS-11079
>                 URL: https://issues.apache.org/jira/browse/HDFS-11079
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>            Reporter: Xiaobing Zhou
>            Assignee: Xiaobing Zhou
>
> When tests are added to TestQuotaByStorageType by HDFS-11065, it's been 
> noticed that it takes minutes to launch MiniDFSClusters for every tests. This 
> tries to refactor the code to use a static shared MiniDFSCluster to 
> accelerate tests.



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