Github user HyukjinKwon commented on the issue: https://github.com/apache/spark/pull/20373 Yup, I double checked that ahead by manual port. I think that failure might be related with environment which I think is the same I met. If we run the comments as written in the travis, seems passing all fine. Let me leave my LGTM but let's wait for other looks from other reviewers here.
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