Github user tzulitai commented on the issue:
https://github.com/apache/flink/pull/4535
@zhuganghuaonnet it doesn't seem like the PR is correctly rebased. Ideally,
you should rebase your development branch to the latest master, and the PR only
contains for your changes, and not others.
And yes, please include necessary unit tests / integration tests along with
the PR!---
