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Posted to hdfs-dev@hadoop.apache.org by "Daryn Sharp (JIRA)" <ji...@apache.org> on 2014/01/15 00:09:27 UTC

[jira] [Created] (HDFS-5773) NN may reject formerly dead DNs

Daryn Sharp created HDFS-5773:
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             Summary: NN may reject formerly dead DNs
                 Key: HDFS-5773
                 URL: https://issues.apache.org/jira/browse/HDFS-5773
             Project: Hadoop HDFS
          Issue Type: Bug
    Affects Versions: 0.23.10, 2.0.0-alpha, 3.0.0
            Reporter: Daryn Sharp
            Priority: Critical


If the heartbeat monitor declares a node dead, it may never allow a DN to rejoin.  The NN will generate messages like "Got blockReceivedDeleted message from unregistered or dead node".

There appears to be a bug where the the isAlive flag is not set to true when a formerly known DN attempts to rejoin.



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