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From "Zhe Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-7374) Allow decommissioning of dead DataNodes
Date Sat, 08 Nov 2014 05:17:34 GMT

     [ https://issues.apache.org/jira/browse/HDFS-7374?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Zhe Zhang updated HDFS-7374:
----------------------------
    Attachment: HDFS-7374-001.patch

Thanks [~mingma] again for the comment.

This patch implements option #2. It also moved an utility function to {{DFSTestUtil}} so it's
accessible in the new unit test.

> 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
>
>
> 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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