Learn about delivery guarantees in stream processing, how I believe the terms that we use to describe them are misleading, and how you can avoid the bugs and misconceptions that result from this great injustice.
I wasn't trying to scare anyone away from stream processing in this video, in fact a lot of the issues outlined also apply to automated batch processing systems as well. Personally, I think that being realistic and pragmatic about failure conditions makes these systems less intimidating.