[ https://issues.apache.org/jira/browse/KAFKA-5825?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16154645#comment-16154645 ]
Guozhang Wang commented on KAFKA-5825: -------------------------------------- [~ryanworsley] At the moment I cannot think of any causes on top of my head for your scenario, you would need to look at the client-side (not broker-side) Streams logs to see what it gets blocked on. > Streams not processing when exactly once is set > ----------------------------------------------- > > Key: KAFKA-5825 > URL: https://issues.apache.org/jira/browse/KAFKA-5825 > Project: Kafka > Issue Type: Bug > Components: streams > Affects Versions: 0.11.0.0 > Environment: EmbeddedKafka running on Windows. Relevant files > attached. > Reporter: Ryan Worsley > Attachments: build.sbt, log4j.properties, Tests.scala > > > +Set-up+ > I'm using [EmbeddedKafka|https://github.com/manub/scalatest-embedded-kafka/] > for ScalaTest. > This spins up a single broker internally on a random port. > I've written two tests - the first without transactions, the second with. > They're nearly identical apart from the config and the transactional > semantics. I've written the transactional version based on Neha's > [blog|https://www.confluent.io/blog/exactly-once-semantics-are-possible-heres-how-apache-kafka-does-it/] > which is the closest thing I could find to instructions. > The tests wait until a single message is processed by the streams topology, > they use this message to complete a promise that the test is waiting on. > Once the promise completes the test verifies the value of the promise as > being the expected value of the message. > +Observed behaviour+ > The first test passes fine, the second test times out, the stream processor > never seems to read the transactional message. > +Notes+ > I've attached my build.sbt, log4j.properties and my Tests.scala file in order > to make it as easy as possible for someone to re-create. I'm running on > Windows and using Scala as this reflects my workplace. I completely expect > there to be some configuration issue that's causing this, but am unable to > proceed at this time. > Related information: > https://github.com/manub/scalatest-embedded-kafka/issues/82 -- This message was sent by Atlassian JIRA (v6.4.14#64029)