[HBASE-26636] Update the ref guide upgrading section to mention that the master issue when upgrading to 2.3

• Type: Task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 3.0.0-alpha-3
• Component/s: documentation
• Hadoop Flags: Reviewed
• Assignee: Duo Zhang
• Reporter: Duo Zhang
• Created: 30/Dec/21 01:57
• Updated: 31/Dec/21 23:42
• Resolved: 31/Dec/21 04:07

Description

Since we migrate the procedure store while upgrading the active master, if there are backup masters which are still on the old version should not become active any more, otherwise it may cause problems.

We should mention this in the ref guide.

Issue Links

• links to: GitHub Pull Request #3989