Hello, *Jörn Franke*. Thank you for reply.
If I correctly realise your answer, the watermark Flink mechanism should help me sort events in order I need. So I should dig deeper in that issue. For example, I read three topics, make joins and after get two events by the same user in this order: event B (time_event: 12:00) -> event A (time_event: 10:00) And after watermarkering, the situation is another: A -> B Can you confirm I move in right way? And another moment about communicating with clients. Why need I use nosql DB? I want to use Flink CEP library to build pattern: - recived event A, - then recived Event B, - not recived event C after B for 20 minutes If pattern is completed by user, so I push record to special Kafka topic. And another system must make a notification to client. I want to get this picture. Or in fact it's no way to get this result using Flink and CEP lib? Sorry for disturning you. I have no experience with Flink at all. And now I want to realise how it compatible with that task. Thanks, Yuri L. -- Sent from: http://apache-flink-user-mailing-list-archive.2336050.n4.nabble.com/
