Github user Leemoonsoo commented on the issue:
https://github.com/apache/zeppelin/pull/1360
I think it changes way of configuration. From single jdbc interpreter
setting manages multiple jdbc connection, to individual interpreter setting
manage single jdbc connection.
How about remove non-default jdbc connection configurations from default
properties and documentation?
https://github.com/apache/zeppelin/blob/master/jdbc/src/main/resources/interpreter-setting.json
https://github.com/apache/zeppelin/blob/master/docs/interpreter/jdbc.md
And incompatible changes can be guided in
https://github.com/apache/zeppelin/blob/master/docs/install/upgrade.md
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