Github user StephanEwen commented on the pull request: https://github.com/apache/flink/commit/abb4496781883937a935113c1e33ae1174aafa73#commitcomment-18789807 Can I re-iterate on this issue? Do we need tests here that fire up Kafka clusters? Those are very time intensive, they are tough to harden so that the build is reliable, and what do they really add here? Assuming the the Kafka connector works, this should test the "add on" by the TableSource. That can be done with a mock FlinkKafkaConsumer. I think it would be very good to update this.
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