Eugene Koifman created HIVE-19599:

             Summary: Release Notes : Highlighting backwards incompatible 
                 Key: HIVE-19599
             Project: Hive
          Issue Type: Bug
          Components: Documentation
    Affects Versions: 3.0.0
            Reporter: Eugene Koifman
            Assignee: Vineet Garg

We need to highlight backwards incompatible changes.  A list Jira titles won't 
be sufficient.

For example, tables with Acid V1 (pre 3.0) data has to be major compacted 
before upgrade and may not process any update/delete/merge until after upgrade. 
 Not doing so may result in data corruption/loss.

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