Weichen Xu created ZEPPELIN-1391:
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Summary: print error while existing registedInterpreter with the
same key but different settings
Key: ZEPPELIN-1391
URL: https://issues.apache.org/jira/browse/ZEPPELIN-1391
Project: Zeppelin
Issue Type: Bug
Components: Interpreters
Reporter: Weichen Xu
In `Interpreter.register`,
we should check the case in which registeredInterpreter's key already exists,
but the old interpreter has different settings, and print error.
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