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https://issues.apache.org/jira/browse/HDFS-2667?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Todd Lipcon resolved HDFS-2667.
-------------------------------

       Resolution: Fixed
    Fix Version/s: HA branch (HDFS-1623)
     Hadoop Flags: Reviewed

Committed to the branch, thanks Aaron.
                
> 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
>             Fix For: HA branch (HDFS-1623)
>
>         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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