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https://issues.apache.org/jira/browse/HDFS-11217?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15730127#comment-15730127
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Anu Engineer commented on HDFS-11217:
-------------------------------------

[~andrew.wang] Thanks for the explanation. Makes sense. But the original JIRA 
mentions
bq.  Adding methods to interfaces breaks the user classes which implement them
But I agree that user classes should not be implementing them. I am okay with 
making these private.


> Make some JMX interfaces private
> --------------------------------
>
>                 Key: HDFS-11217
>                 URL: https://issues.apache.org/jira/browse/HDFS-11217
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>            Reporter: Akira Ajisaka
>            Assignee: Jagadesh Kiran N
>
> NameNodeMXBean, NameNodeStatusMXBean, DataNodeMXBean are annotated 
> {{@Public}} and {{@Stable}}, but some methods are being added. For example, 
> DataNodeMXBean.getBPServiceActorInfo was added between branch-2.7.3 and 
> branch-2.8. Adding methods to interfaces breaks the user classes which 
> implement them, so we should make them {{@Private}}.



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