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From "Tsz Wo (Nicholas), SZE (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-5526) Datanode cannot roll back to previous layout version
Date Tue, 19 Nov 2013 03:05:21 GMT
Tsz Wo (Nicholas), SZE created HDFS-5526:
--------------------------------------------

             Summary: Datanode cannot roll back to previous layout version
                 Key: HDFS-5526
                 URL: https://issues.apache.org/jira/browse/HDFS-5526
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: datanode
            Reporter: Tsz Wo (Nicholas), SZE
            Priority: Blocker


Current trunk layout version is -48.
Hadoop v2.2.0 layout version is -47.

If a cluster is upgraded from v2.2.0 (-47) to trunk (-48), the datanodes cannot start with
-rollback.  It will fail with IncorrectVersionException.



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