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https://issues.apache.org/jira/browse/HDFS-2866?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13197477#comment-13197477
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Aaron T. Myers commented on HDFS-2866:
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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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