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https://issues.apache.org/jira/browse/HDFS-9330?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15118412#comment-15118412
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Arpit Agarwal commented on HDFS-9330:
-------------------------------------

There is probably one more bug. The behavior of {{ReconfigurableBase}} is not 
consistent when calling {{reconfigurePropertyImpl}}.

{{ReconfigurationThread#run}} does not update the value in the cached 
configuration object whereas {{ReconfigurableBase#reconfigureProperty}} does. 
The contract of {{reconfigurePropertyImpl}} does not specify who is supposed to 
update it.

You may want to hold off posting an updated patch for this and related Jiras 
until we get this part answered.

> Support reconfiguring dfs.datanode.duplicate.replica.deletion without DN 
> restart 
> ---------------------------------------------------------------------------------
>
>                 Key: HDFS-9330
>                 URL: https://issues.apache.org/jira/browse/HDFS-9330
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: datanode
>            Reporter: Xiaobing Zhou
>            Assignee: Xiaobing Zhou
>         Attachments: HDFS-9330-HDFS-9000.002.patch, 
> HDFS-9330-HDFS-9000.003.patch, HDFS-9330.001.patch
>
>
> This is to reconfigure
> {code}
> dfs.datanode.duplicate.replica.deletion
> {code}
> without restarting DN.



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