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https://issues.apache.org/jira/browse/HDFS-10566?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Xiaobing Zhou reassigned HDFS-10566:
------------------------------------

    Assignee: Xiaobing Zhou

> Submit plan request should throw exception if Datanode is undergoing an 
> upgrade. 
> ---------------------------------------------------------------------------------
>
>                 Key: HDFS-10566
>                 URL: https://issues.apache.org/jira/browse/HDFS-10566
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: datanode
>            Reporter: Jitendra Nath Pandey
>            Assignee: Xiaobing Zhou
>
> If datanode is in upgrade, it might be simpler to just refuse balancing. 



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