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