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From "Owen O'Malley (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-526) datanode lock message causes NullPointerException
Date Tue, 12 Sep 2006 23:23:28 GMT
datanode lock message causes NullPointerException

                 Key: HADOOP-526
                 URL: http://issues.apache.org/jira/browse/HADOOP-526
             Project: Hadoop
          Issue Type: Bug
          Components: dfs
    Affects Versions: 0.6.0
            Reporter: Owen O'Malley
         Assigned To: Milind Bhandarkar
             Fix For: 0.6.1

If you try to bring up a second datanode in the same directory, you get a NullPointerException.

Exception in thread "main" java.lang.NullPointerException
        at org.apache.hadoop.dfs.DataStorage.lock(DataStorage.java:132)
        at org.apache.hadoop.dfs.DataStorage.<init>(DataStorage.java:72)
        at org.apache.hadoop.dfs.DataStorage.<init>(DataStorage.java:50)
        at org.apache.hadoop.dfs.DataNode.<init>(DataNode.java:194)
        at org.apache.hadoop.dfs.DataNode.<init>(DataNode.java:155)
        at org.apache.hadoop.dfs.DataNode.makeInstance(DataNode.java:1050)
        at org.apache.hadoop.dfs.DataNode.run(DataNode.java:984)
        at org.apache.hadoop.dfs.DataNode.runAndWait(DataNode.java:1013)
        at org.apache.hadoop.dfs.DataNode.main(DataNode.java:1066)

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