runzhiwang opened a new pull request #359: URL: https://github.com/apache/incubator-ratis/pull/359
## What changes were proposed in this pull request? In HA case, such as there are three server: server1, server2, server3, server1 is the leader. 1. if we want to rolling upgrade leader, we can upgrade server2, and then assign server2 with the highest priority, and server1 stop accepting client request, then server2 will try to grab the leader once catch up the log 2. if we want to rollback, we can assign server1 with the highest priority again and server2 stop accepting client request. ## What is the link to the Apache JIRA https://issues.apache.org/jira/browse/RATIS-1245 ## How was this patch tested? new ut ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: [email protected]
