setAutoWatermarkInterval configures how often the watermark is produced. so if watermark is not proceeding, if you set shorter interval, you would see t1, t1, t1, t1, t1 more often. But what you would like to see is t1, t2, t3, t4....
If you want to see count 0 when there is no incoming events,0 sounds for me it's your use case, you can check sliding window. I think seeing watermark in UI is possible now, or you can use debug mode to see it. The watermark you use won't wait for all topics(partitions). It's possible if you implement your own watermark. Cheers, Sendoh -- Sent from: http://apache-flink-user-mailing-list-archive.2336050.n4.nabble.com/
