Duo Zhang created HBASE-26636:
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Summary: Update the ref guide upgrading section to mention that
the master issue when upgrading to 2.3
Key: HBASE-26636
URL: https://issues.apache.org/jira/browse/HBASE-26636
Project: HBase
Issue Type: Task
Components: documentation
Reporter: Duo Zhang
Assignee: Duo Zhang
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.
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