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https://issues.apache.org/jira/browse/HDFS-2866?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13198455#comment-13198455
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Hari Mankude commented on HDFS-2866:
------------------------------------

Hi Aaron,

I (we) are not convinced that having fsimage in a shared location is a bad 
idea.  This issue can happen with local edit dirs having a gap in txid with 
respect to shared edit dirs. Please leave the jiras open until we get a chance 
to think this through.
                
> 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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