datanode lock message causes NullPointerException
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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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