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https://issues.apache.org/jira/browse/HDFS-7642?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15536701#comment-15536701
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Sean Mackrory commented on HDFS-7642:
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Hey [~zhz] - I'd like to work on this, if that's alright with you. Since it's
been quite a few months, I assume nothing is actively in progress here?
I would probably implement this somewhere inside
DecommissionManager.Monitor.run()
> NameNode should periodically log DataNode decommissioning progress
> ------------------------------------------------------------------
>
> Key: HDFS-7642
> URL: https://issues.apache.org/jira/browse/HDFS-7642
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Zhe Zhang
> Assignee: Zhe Zhang
> Priority: Minor
>
> We've see a case where the decommissioning was stuck due to some files have
> more replicas then DNs. HDFS-5662 fixes this particular issue but there are
> other use cases where the decommissioning process might get stuck or slow
> down. Some monitoring / logging will help debugging those issues.
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