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https://issues.apache.org/jira/browse/ARTEMIS-2568?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16994767#comment-16994767
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Thomas Wood commented on ARTEMIS-2568:
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We experience this all the time and are relying on a custom ping to help delay
the restart of the master.
Maybe a time setting to delay the restart would help with this?
> Race condition between failover processing and master restart can cause split
> brain
> -----------------------------------------------------------------------------------
>
> Key: ARTEMIS-2568
> URL: https://issues.apache.org/jira/browse/ARTEMIS-2568
> Project: ActiveMQ Artemis
> Issue Type: Bug
> Affects Versions: 2.10.1
> Reporter: Bob Mitchell
> Priority: Major
>
> We have seen split brain in the following sequence of events when using
> replicating backups with failback:
> # Master fails or is shutdown
> # Backup detects failure and starts to failover
> # Master is restarted before Backup becomes "live"
> # It's check for a "duplicate" server fails because backup is not live yet
> # Master and backup both become live.
> At the very least, we would like to see the window for this to occur to be
> reduced, possibly by having the backup check again for the master to be
> available just before going live. It might also be necessary to have the
> master check for a duplicate server as a last step before going live as well.
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