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From "sam liu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-5526) Datanode cannot roll back to previous layout version
Date Mon, 22 Sep 2014 07:45:35 GMT

    [ https://issues.apache.org/jira/browse/HDFS-5526?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14142992#comment-14142992
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sam liu commented on HDFS-5526:
-------------------------------

I also encountered similar error on the secondary namenode and opened another jira HDFS-7114

> 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
>            Assignee: Kihwal Lee
>            Priority: Blocker
>             Fix For: 0.23.10, 2.3.0
>
>         Attachments: HDFS-5526.patch, HDFS-5526.patch
>
>
> 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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