Github user HyukjinKwon commented on the issue: https://github.com/apache/spark/pull/20465 > My proposal is, pandas and pyarrow should be a hard requirement for our jenkins, to make sure the features are well tested. If this is a goal, I think another simple way is just to use an env set in Jenkins and throw an exception if both PyArrow or Pandas are not installed in the future.
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