Simone created KAFKA-8504: ----------------------------- Summary: Suppressed do not emit with TimeWindows Key: KAFKA-8504 URL: https://issues.apache.org/jira/browse/KAFKA-8504 Project: Kafka Issue Type: Bug Components: streams Affects Versions: 2.2.1 Reporter: Simone
Hi, I'm playing a bit with KafkaStream and the new suppress feature. I noticed that when using a {{TimeWindows}} without explicitly setting the grace {{suppress}} will not emit any message if used with {{Suppressed.untilWindowCloses.}} I look a bit into the code and from what I understood with this configuration {{suppress}} should use the {{grace}} setting of the {{TimeWindows}}. But since using {{TimeWindows.of(Duration)}} default the grace to {{-1}} and when getting the grace using the method {{TimeWindows.gracePeriodMs()}} in case of grace equals to -1 the return value is set to {{maintainMs() - size()}} I think that the end of window is not properly calculated. Of course is possible to avoid this problem forcing the {{grace}} to 0 when creating the TimeWindows but I think that this should be the default behaviour at least when it comes to the suppress feature. I hope I have not misunderstood the code in my analysis, thank you :) Simone -- This message was sent by Atlassian JIRA (v7.6.3#76005)