James Taylor created PHOENIX-3166:
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             Summary: Snapshot SYSTEM.CATALOG before upgrade run
                 Key: PHOENIX-3166
                 URL: https://issues.apache.org/jira/browse/PHOENIX-3166
             Project: Phoenix
          Issue Type: Bug
            Reporter: James Taylor


We should snapshot the SYSTEM.CATALOG before running the upgrade and restore to 
the snapshot in the event of a problem. Worst case, if connectivity to HBase 
goes down midway through the upgrade, we'll at least have the snapshot 
available to restore back in an emergency.



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