[HADOOP-526] datanode lock message causes NullPointerException

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.6.0
• Fix Version/s: 0.6.1
• Assignee: Milind Barve
• Reporter: Owen O'Malley
• Created: 12/Sep/06 23:23
• Updated: 08/Jul/09 16:42
• Resolved: 12/Sep/06 23:44

Description

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)