[jira] Created: (HADOOP-4476) NPE in datanode.handshake()

[Steve Loughran (JIRA)]

NPE in datanode.handshake()
---------------------------

                 Key: HADOOP-4476
                 URL: https://issues.apache.org/jira/browse/HADOOP-4476
             Project: Hadoop Core
          Issue Type: Bug
          Components: dfs
    Affects Versions: 0.20.0
            Reporter: Steve Loughran
            Priority: Minor


It appears possible to raise an NPE in DataNode.handshake() if the startup 
protocol gets interrupted or fails in some manner

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