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From "Jing Zhao (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-5920) Support rollback of rolling upgrade in NameNode and JournalNodes
Date Mon, 10 Feb 2014 22:05:19 GMT

    [ https://issues.apache.org/jira/browse/HDFS-5920?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13897092#comment-13897092
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Jing Zhao commented on HDFS-5920:
---------------------------------

Thanks for the comments Suresh!

bq. JournalNodeRpcServer#doRollingRollback is an empty method
Oops.. I forgot to put "jn.doRollingRollback(journalId, startTxId)" there... The functionality
has been included in the 000 patch except the call there.

bq. "their editlog starting at or above the given txid."
Here I want to mean ">=". I will update it to make it more clear.

bq. Instead of RollingRollbackRequest in QJournalProtocol, we may be able to call it discardSegments?
Will rename it in the next patch.


> Support rollback of rolling upgrade in NameNode and JournalNodes
> ----------------------------------------------------------------
>
>                 Key: HDFS-5920
>                 URL: https://issues.apache.org/jira/browse/HDFS-5920
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: journal-node, namenode
>            Reporter: Jing Zhao
>            Assignee: Jing Zhao
>         Attachments: HDFS-5920.000.patch, HDFS-5920.000.patch
>
>
> This jira provides rollback functionality for NameNode and JournalNode in rolling upgrade.



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