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From "Kihwal Lee (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-3087) Decomissioning on NN restart can complete without blocks being replicated
Date Fri, 21 Mar 2014 20:57:59 GMT

     [ https://issues.apache.org/jira/browse/HDFS-3087?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Kihwal Lee updated HDFS-3087:
-----------------------------

     Target Version/s: 2.5.0
    Affects Version/s:     (was: 0.24.0)
        Fix Version/s:     (was: 0.23.4)
                           (was: 0.23.2)
                           (was: 0.24.0)
                           (was: 0.23.0)
             Assignee:     (was: Kihwal Lee)

> Decomissioning on NN restart can complete without blocks being replicated
> -------------------------------------------------------------------------
>
>                 Key: HDFS-3087
>                 URL: https://issues.apache.org/jira/browse/HDFS-3087
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: namenode
>    Affects Versions: 0.23.0
>            Reporter: Kihwal Lee
>            Priority: Critical
>         Attachments: HDFS-3087.patch
>
>
> If a data node is added to the exclude list and the name node is restarted, the decomissioning
happens right away on the data node registration. At this point the initial block report has
not been sent, so the name node thinks the node has zero blocks and the decomissioning completes
very quick, without replicating the blocks on that node.



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