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From "Suresh Srinivas (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-5920) Support rollback of rolling upgrade in NameNode and JournalNodes
Date Mon, 10 Feb 2014 21:55:20 GMT

    [ https://issues.apache.org/jira/browse/HDFS-5920?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13897074#comment-13897074
] 

Suresh Srinivas commented on HDFS-5920:
---------------------------------------

Few early comments:
# Instead of RollingRollbackRequest in QJournalProtocol, we may be able to call it discardSegments?
# I am assuming that based on your previous comment, JournalNodeRpcServer#doRollingRollback
is an empty method and you are still implementing the functionality.
# "their editlog starting at or above the given txid." Is this correct? Journal must delete
records starting from given txid. If the transaction ends before this txid, then the journal
can ignore the request.


> 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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