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From "Suresh Srinivas (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-3393) Rollback on newer release must not be allowed if the layout version in the snapshot is for older release.
Date Wed, 09 May 2012 23:35:52 GMT
Suresh Srinivas created HDFS-3393:
-------------------------------------

             Summary: Rollback on newer release must not be allowed if the layout version
in the snapshot is for older release.
                 Key: HDFS-3393
                 URL: https://issues.apache.org/jira/browse/HDFS-3393
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: name-node
    Affects Versions: 1.0.0, 2.0.0, 3.0.0
            Reporter: Suresh Srinivas


After upgrading to a new release, the procedure to rollback to older release is to start the
namenode in older release with -rollback option.

As reported in HADOOP-8371, the rollback was allowed on the newer release. During rollback,
namenode must allow rollback only if the layout version of the namenode matches that of the
layout version in the snapshot that the namenode is rolling back to.


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