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https://issues.apache.org/jira/browse/HDFS-2794?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13186752#comment-13186752
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Aaron T. Myers commented on HDFS-2794:
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Agree it's not super high priority, but we should try to improve the situation
if we can. Easy things which would help would be to:
* Automatically configure a higher minimum retention count if HA is enabled
* Make sure to document that admins should also configure a remote fsimage dir
in addition to the shared remote edits dir
> HA: Active NN may purge edit log files before standby NN has a chance to read
> them
> ----------------------------------------------------------------------------------
>
> Key: HDFS-2794
> URL: https://issues.apache.org/jira/browse/HDFS-2794
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: ha, name-node
> Affects Versions: HA branch (HDFS-1623)
> Reporter: Aaron T. Myers
> Assignee: Aaron T. Myers
>
> Given that the active NN is solely responsible for purging finalized edit log
> segments, and given that the active NN has no way of knowing when the standby
> reads edit logs, it's possible that the standby NN could fail to read all
> edits it needs before the active purges the files.
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