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From "Aaron T. Myers (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-2667) HA: Fix NN Active->Standby transition
Date Thu, 15 Dec 2011 09:12:31 GMT

    [ https://issues.apache.org/jira/browse/HDFS-2667?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13170060#comment-13170060
] 

Aaron T. Myers commented on HDFS-2667:
--------------------------------------

+1, latest patch looks good to me.
                
> HA: Fix NN Active->Standby transition
> -------------------------------------
>
>                 Key: HDFS-2667
>                 URL: https://issues.apache.org/jira/browse/HDFS-2667
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: ha, name-node
>    Affects Versions: HA branch (HDFS-1623)
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>         Attachments: hdfs-2667.txt, hdfs-2667.txt, hdfs-2667.txt, hdfs-2667.txt
>
>
> Currently when the active transitions to standby (eg for a manual failover) the EditLogTailer
starts tailing edits at the wrong transaction ID. This causes it to double-apply a bunch of
edits, which causes various problems. We need to add a test which checks this state transition
and fix any related bugs.

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