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https://issues.apache.org/jira/browse/HDFS-7374?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14213244#comment-14213244
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Ming Ma commented on HDFS-7374:
-------------------------------
So maybe we can use "if all blocks in the whole cluster are fully replicated"
instead of "if all blocks of that dead node are fully replicated" as the
criteria to move that dead node to decommed state?
> Allow decommissioning of dead DataNodes
> ---------------------------------------
>
> Key: HDFS-7374
> URL: https://issues.apache.org/jira/browse/HDFS-7374
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Zhe Zhang
> Assignee: Zhe Zhang
> Attachments: HDFS-7374-001.patch, HDFS-7374-002.patch
>
>
> We have seen the use case of decommissioning DataNodes that are already dead
> or unresponsive, and not expected to rejoin the cluster.
> The logic introduced by HDFS-6791 will mark those nodes as
> {{DECOMMISSION_INPROGRESS}}, with a hope that they can come back and finish
> the decommission work. If an upper layer application is monitoring the
> decommissioning progress, it will hang forever.
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