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Posted to hdfs-dev@hadoop.apache.org by "Tsz Wo (Nicholas), SZE (JIRA)" <ji...@apache.org> on 2013/11/19 04:05:21 UTC

[jira] [Created] (HDFS-5526) Datanode cannot roll back to previous layout version

Tsz Wo (Nicholas), SZE created HDFS-5526:
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             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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