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https://issues.apache.org/jira/browse/HDFS-14936?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16961275#comment-16961275
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Íñigo Goiri commented on HDFS-14936:
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How is the test coverage for this?
This is indirectly tested by other but it may make sense to make it more 
explicit given now is public.

> Add getNumOfChildren() for interface InnerNode
> ----------------------------------------------
>
>                 Key: HDFS-14936
>                 URL: https://issues.apache.org/jira/browse/HDFS-14936
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>            Reporter: Lisheng Sun
>            Assignee: Lisheng Sun
>            Priority: Minor
>         Attachments: HDFS-14936.001.patch
>
>
> current code InnerNode subclass InnerNodeImpl and DFSTopologyNodeImpl both 
> have getNumOfChildren(). 
> so Add getNumOfChildren() for interface InnerNode and remove unnessary 
> getNumOfChildren() in DFSTopologyNodeImpl.



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