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From "Tsz Wo (Nicholas), SZE (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-5526) Datanode cannot roll back to previous layout version
Date Tue, 26 Nov 2013 02:41:35 GMT

    [ https://issues.apache.org/jira/browse/HDFS-5526?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13832224#comment-13832224
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Tsz Wo (Nicholas), SZE commented on HDFS-5526:
----------------------------------------------

Kihwal, I tested this with HDFS-2832 after the commit.  It worked well.  Thanks!

> 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: 3.0.0, 2.3.0, 0.23.10
>
>         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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