Github user soralee commented on the issue:
https://github.com/apache/zeppelin/pull/2186
@AhyoungRyu This PR reverted some of #2042 and I didn't include to change
[this line](
https://github.com/apache/zeppelin/pull/2042/files#diff-7a20bcbe25109dfb2ad811a62a366cbeL63).
If we decide to revert # 2042, I can give you help to check the reverted
code.
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