Github user marevol commented on the issue: https://github.com/apache/incubator-predictionio/pull/436 For test failures on Travis, I think it's Travis problem. [My Travis](https://travis-ci.org/jpioug/incubator-predictionio/builds/282978334) result is passed. Spark 2.2 seems to break Guava dependency... @shimamoto looked into this problem.
---