Github user prabhjyotsingh commented on the issue:
https://github.com/apache/zeppelin/pull/2481
@herval The reason this exception didn't get caught with any of the
existing test cases is because this particular dependency (for
UserGroupInformation) is marked as `provided`
(https://github.com/apache/zeppelin/blob/master/jdbc/pom.xml#L106) and while
executing any of the test cases it gets resolved but doesn't get bundled.
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