Github user felixcheung commented on the issue:
https://github.com/apache/zeppelin/pull/1582
I reviewed these changes again and didn't see why they would cause that
error.
Could you rebase this PR and check our my comment (which should simplify
the diff).
These changes would be very good to have in the coming release; let's try
this again - if test fails again you could close and reopen this PR to trigger
CI runs manually.
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