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https://issues.apache.org/jira/browse/HDFS-7877?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14588661#comment-14588661
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Kihwal Lee commented on HDFS-7877:
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[~rajive] It will be nice if we can get your perspective on this. 

> Support maintenance state for datanodes
> ---------------------------------------
>
>                 Key: HDFS-7877
>                 URL: https://issues.apache.org/jira/browse/HDFS-7877
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>            Reporter: Ming Ma
>         Attachments: HDFS-7877-2.patch, HDFS-7877.patch, 
> Supportmaintenancestatefordatanodes-2.pdf, 
> Supportmaintenancestatefordatanodes.pdf
>
>
> This requirement came up during the design for HDFS-7541. Given this feature 
> is mostly independent of upgrade domain feature, it is better to track it 
> under a separate jira. The design and draft patch will be available soon.



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