Github user bowenli86 commented on the issue:
https://github.com/apache/flink/pull/5069
@tzulitai @yew1eb I just saw the code in src tree and traced back to this
PR. I feel it's really bad to have runnable examples (with java main method) in
a lib jar that Flink distributes.
@yew1eb can you move the examples to `/test`? I believe that's the right
way of adding examples---
