Github user hequn8128 commented on the issue:
https://github.com/apache/flink/pull/6267
@AlexanderKoltsov Hi, thanks for looking into this problem. The PR looks
good. I agree with @fhueske that `DataStreamUnion ` should be fixed in this PR.
Furthermore, I find `DataSetMinus` and `DataSetIntersect` have the same
problem. It would be great if you can open a new jira to track the problem. ---
