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From "Owen O'Malley (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-1242) dfs upgrade/downgrade problems
Date Tue, 10 Apr 2007 21:07:32 GMT
dfs upgrade/downgrade problems

                 Key: HADOOP-1242
                 URL: https://issues.apache.org/jira/browse/HADOOP-1242
             Project: Hadoop
          Issue Type: Bug
          Components: dfs
    Affects Versions: 0.13.0
            Reporter: Owen O'Malley
         Assigned To: dhruba borthakur
            Priority: Critical
             Fix For: 0.13.0

I ran my test cluster on 0.13 and then tried to run it under 0.12. When I downgraded, the
namenode would not come up and the message said I needed to format the filesystem. I ignored
that and tried to restart on 0.13, now the datanode will not come up with:

2007-04-10 11:25:37,448 ERROR org.apache.hadoop.dfs.DataNode: org.apache.hadoop.
dfs.InconsistentFSStateException: Directory /local/owen/hadoop/dfs/d
ata is in an inconsistent state: Old layout block directory /local/owen/hadoop/dfs/data/data
is missing
        at org.apache.hadoop.dfs.DataStorage.isConversionNeeded(DataStorage.java
        at org.apache.hadoop.dfs.Storage$StorageDirectory.analyzeStorage(Storage
        at org.apache.hadoop.dfs.DataStorage.recoverTransitionRead(DataStorage.j
        at org.apache.hadoop.dfs.DataNode.startDataNode(DataNode.java:230)
        at org.apache.hadoop.dfs.DataNode.<init>(DataNode.java:199)
        at org.apache.hadoop.dfs.DataNode.makeInstance(DataNode.java:1175)
        at org.apache.hadoop.dfs.DataNode.run(DataNode.java:1119)
        at org.apache.hadoop.dfs.DataNode.createDataNode(DataNode.java:1140)
        at org.apache.hadoop.dfs.DataNode.main(DataNode.java:1299)

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