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From "Konstantin Shvachko (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-5077) NPE in FSNamesystem.commitBlockSynchronization()
Date Wed, 07 Aug 2013 22:14:48 GMT
Konstantin Shvachko created HDFS-5077:

             Summary: NPE in FSNamesystem.commitBlockSynchronization()
                 Key: HDFS-5077
                 URL: https://issues.apache.org/jira/browse/HDFS-5077
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: namenode
    Affects Versions: 2.0.5-alpha
            Reporter: Konstantin Shvachko

NN starts a block recovery, which will synchronize block replicas on different DNs. In the
end one of DNs will report the list of the nodes containing the consistent replicas to the
NN via commitBlockSynchronization() call. The NPE happens if just before processing commitBlockSynchronization()
NN removes from active one of DNs that are then reported in the call.

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