Github user casidiablo commented on the issue:
https://github.com/apache/flink/pull/4150
Since EMR only supports Flink 1.3 I had to checkout release-1.3 and compile
the connector from there. Then I was getting this `Socket not created by this
factory` error.
I then patched 1.3 to include these changes, and that fixed it.
The current master version can't be used because so many things have
changed since then, and it does not seem to be compatible with EMR right now.---
