Stefan Richter created FLINK-4134: ------------------------------------- Summary: EventTimeSessionWindows trigger for empty windows when dropping late events Key: FLINK-4134 URL: https://issues.apache.org/jira/browse/FLINK-4134 Project: Flink Issue Type: Bug Components: DataStream API Affects Versions: 1.0.3 Reporter: Stefan Richter
It seems like EventTimeSessionWindows sometimes trigger for empty windows. The behavior is observed in connection with dropping late events: {code} stream .keyBy("sessionKey") .window(EventTimeSessionWindows.withGap(Time.milliseconds(100))) .allowedLateness(Time.milliseconds(0)) .apply(new ValidatingWindowFunction()) .print(); {code} I wrote a generator that generates events for several parallel sessions and that allows to reproduce the error. For now, I can share this generator privately for debugging purposes, but my plan is to use the generator as basis for an integration test. -- This message was sent by Atlassian JIRA (v6.3.4#6332)