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From "Kihwal Lee (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-3087) Decomissioning on NN restart can complete without blocks being replicated
Date Tue, 13 Mar 2012 21:18:40 GMT
Decomissioning on NN restart can complete without blocks being replicated
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                 Key: HDFS-3087
                 URL: https://issues.apache.org/jira/browse/HDFS-3087
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: name-node
    Affects Versions: 0.23.0, 0.24.0
            Reporter: Kihwal Lee
            Priority: Critical
             Fix For: 0.24.0, 0.23.2, 0.23.3, 0.23.0


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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