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https://issues.apache.org/jira/browse/HDFS-6678?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14061167#comment-14061167
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Andrew Wang commented on HDFS-6678:
-----------------------------------
+1 LGTM
> MiniDFSCluster may still be partially running after initialization fails.
> -------------------------------------------------------------------------
>
> Key: HDFS-6678
> URL: https://issues.apache.org/jira/browse/HDFS-6678
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: test
> Affects Versions: 3.0.0, 2.5.0
> Reporter: Chris Nauroth
> Assignee: Chris Nauroth
> Priority: Minor
> Attachments: HDFS-6678.1.patch
>
>
> {{MiniDFSCluster}} initializes the daemons (NameNodes, DataNodes) as part of
> object construction. If initialization fails, then the constructor throws an
> exception. When this happens, it's possible that daemons are left running in
> the background. There is effectively no way to clean up after this state,
> because the constructor failed, and therefore the caller has no way to
> trigger a shutdown.
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