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https://issues.apache.org/jira/browse/RATIS-1247?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17251124#comment-17251124
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Tsz-wo Sze commented on RATIS-1247:
-----------------------------------
I mean priority is not a requirement for rolling upgrade. All the servers can
have the same priority. We may upgrade one of the follower. Then, failover
the leader to that follower using the new failover command. Then, upgrade the
remaining servers.
Now, support the servers have different priorities. If an admin tries to
failover from a higher priority server to a low a priority server, the failover
command should be rejected.
> Support rolling upgrade and rollback
> ------------------------------------
>
> Key: RATIS-1247
> URL: https://issues.apache.org/jira/browse/RATIS-1247
> Project: Ratis
> Issue Type: Sub-task
> Reporter: runzhiwang
> Assignee: runzhiwang
> Priority: Major
>
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