Github user fred521 commented on the issue:
https://github.com/apache/zeppelin/pull/3262
> @fred521 I've found one of your tests failed.
https://travis-ci.org/fred521/zeppelin/builds/467287988 Could you please check
it again?
Thanks
seems randomly failed for the network issue.
now it passed the CI, please see the link below.
https://travis-ci.org/fred521/zeppelin/builds/467287988---
