I am using a producer simulator to simulate the events in the past and I can see my time advances and the topology is based on the event time. But even if I run the producer for few hours nothing get emitted. Is there anyway to debug this issue?
> On Sep 11, 2019, at 6:13 PM, Matthias J. Sax <matth...@confluent.io> wrote: > > Note that `suppress()` is event time based, and does not emit any data > if event time does not advance. > > A common miss understanding is, that people stop to send data and expect > to see a result after some time, but that is not how it works. If you > stop sending data, event time cannot advance and thus emit will never > send anything downstream. > > Also see this blog post about `suppress`: > https://www.confluent.io/blog/kafka-streams-take-on-watermarks-and-triggers > > > -Matthias > > > > On 9/10/19 9:52 PM, Thameem Ansari wrote: >> In my streaming topology, I am using the suppress dsl operator. As per the >> documentation, it is supposed to output the final results after the window >> closes. But I noticed it's not emitting anything at all. Here is the pseudo >> code of my topology. >> >> .filter((key, value) -> ...) >> .flatMap((key, value) -> { >> ... >> }) >> .groupByKey(Grouped.with(Serdes.String(), ...)) >> .windowedBy(TimeWindows.of(Duration.ofMinutes(1)).grace(Duration.ofMinutes(1))) >> .aggregate( >> ... >> ).suppress(Suppressed.untilWindowCloses(Suppressed.BufferConfig.unbounded())); >> >> Anything wrong here?? >> >> Thanks >> Thameem >> >
