Github user theomega commented on the issue: https://github.com/apache/flink/pull/1771 I tried out this branch and it works like it should in the scenario I set up: I wrote (so only using the Sink) to a quiet complex columnfamily in a 8 node cassandra cluster. I was using a complex setup of windowed streams and all the data appeared and was perfectly readable as expected. I also had multiple sinks at the same time which also worked perfectly. I could not test the scenario @rmetzger is mentioning. Overall, I agree with @rmetzger that it should be considered to merge this to get more users to test it and report issues.
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