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From "Aaron T. Myers (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-2866) Standby does not start up due to a gap in transaction id
Date Wed, 01 Feb 2012 01:16:56 GMT

    [ https://issues.apache.org/jira/browse/HDFS-2866?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13197477#comment-13197477
] 

Aaron T. Myers commented on HDFS-2866:
--------------------------------------

Hari, I still think you and Todd are talking about related, but slightly different, scenarios.

Can you confirm that both your NNs were configured to be able to access both of these directories?
If so, I think that would explain the confusion here.

Can you also confirm that the logs you posted in the first comment on this JIRA were all from
the previously-standby NN?
                
> Standby does not start up due to a gap in transaction id
> --------------------------------------------------------
>
>                 Key: HDFS-2866
>                 URL: https://issues.apache.org/jira/browse/HDFS-2866
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: ha
>    Affects Versions: HA branch (HDFS-1623)
>            Reporter: Hari Mankude
>            Priority: Critical
>
> Standby notices a gap in the transaction id in the shared.edits directory. The transactions
in dfs.edits.dir does not seem to have the gap. The gap happens during a failover.

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