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Victor van den Hoven edited comment on KAFKA-15417 at 9/25/23 12:26 PM: ------------------------------------------------------------------------ What to do with "Flaky tests"? I do not think my PR has anything to do with it. Just commit and try again and pray? was (Author: victorvandenhoven): Not sure what I can do about this: > Task :streams:test > org.apache.kafka.streams.integration.EOSUncleanShutdownIntegrationTest.shouldWorkWithUncleanShutdownWipeOutStateStore[exactly_once] > failed, log available in > /home/jenkins/jenkins-agent/workspace/Kafka_kafka-pr_PR-14426@2/streams/build/reports/testOutput/org.apache.kafka.streams.integration.EOSUncleanShutdownIntegrationTest.shouldWorkWithUncleanShutdownWipeOutStateStore[exactly_once].test.stdout > Gradle Test Run :streams:test > Gradle Test Executor 85 > > EOSUncleanShutdownIntegrationTest > [exactly_once] > > shouldWorkWithUncleanShutdownWipeOutStateStore[exactly_once] FAILED :( > JoinWindow does not seem to work properly with a KStream - KStream - > LeftJoin() > -------------------------------------------------------------------------------- > > Key: KAFKA-15417 > URL: https://issues.apache.org/jira/browse/KAFKA-15417 > Project: Kafka > Issue Type: Bug > Components: streams > Affects Versions: 3.4.0 > Reporter: Victor van den Hoven > Assignee: Victor van den Hoven > Priority: Major > Attachments: SimpleStreamTopology.java, SimpleStreamTopologyTest.java > > > In Kafka-streams 3.4.0 : > According to the javadoc of the Joinwindow: > _There are three different window configuration supported:_ > * _before = after = time-difference_ > * _before = 0 and after = time-difference_ > * _*before = time-difference and after = 0*_ > > However if I use a joinWindow with *before = time-difference and after = 0* > on a kstream-kstream-leftjoin the *after=0* part does not seem to work. > When using _stream1.leftjoin(stream2, joinWindow)_ with > {_}joinWindow{_}.{_}after=0 and joinWindow.before=30s{_}, any new message on > stream 1 that can not be joined with any messages on stream2 should be joined > with a null-record after the _joinWindow.after_ has ended and a new message > has arrived on stream1. > It does not. > Only if the new message arrives after the value of _joinWindow.before_ the > previous message will be joined with a null-record. > > Attached you can find two files with a TopologyTestDriver Unit test to > reproduce. > topology: stream1.leftjoin( stream2, joiner, joinwindow) > joinWindow has before=5000ms and after=0 > message1(key1) -> stream1 > after 4000ms message2(key2) -> stream1 -> NO null-record join was made, but > the after period was expired. > after 4900ms message2(key2) -> stream1 -> NO null-record join was made, but > the after period was expired. > after 5000ms message2(key2) -> stream1 -> A null-record join was made, > before period was expired. > after 6000ms message2(key2) -> stream1 -> A null-record join was made, > before period was expired. > -- This message was sent by Atlassian Jira (v8.20.10#820010)