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From "Suresh Srinivas (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-3393) Rollback on newer release must not be allowed if the layout version in the snapshot is for older release.
Date Thu, 10 May 2012 05:01:55 GMT

     [ https://issues.apache.org/jira/browse/HDFS-3393?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Suresh Srinivas updated HDFS-3393:
----------------------------------

    Affects Version/s:     (was: 3.0.0)
                           (was: 2.0.0)

Setting the affected version to 1.0, since this problem is fixed in releases later than 0.22.
                
> 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
>            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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