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From "Todd Lipcon (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 01:56:57 GMT

    [ https://issues.apache.org/jira/browse/HDFS-2866?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13197499#comment-13197499
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Todd Lipcon commented on HDFS-2866:
-----------------------------------

Assuming /homes/hortonha is NFS-mounted (makes sense knowing what I know about Y grid infrastructure),
then you have both of the NNs sharing the same directory for fsimage, which is incorrect.
Also, I wouldn't recommend putting the fsimage dir inside the edits dir (though I don't see
a reason it wouldn't work, it's certainly nonstandard)
                
> 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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