Hi David, I focused on testing the clients using Java 11:
My steps: 1. Start the broker via the native Docker image (apache/kafka-native:4.0.0-rc0) 2. Wrote a simple client to write and read messages, using kafka-clients 4.0.0 from https://repository.apache.org/content/groups/staging 3. Ran my client with group.protocol set to CLASSIC 4. I then ran the client with CONSUMER 5. Finally, I ran two clients instances in the same consumer group, one with a group.protocol set to CLASSIC and the other with CONSUMER Everything worked as expected. I did notice the following message showing up repeatedly in the broker logs after my tests completed: Generated 0 tombstone records while cleaning up group metadata in 0 milliseconds. (org.apache.kafka.coordinator.group.GroupCoordinatorShard) Not sure if that's expected or not. Thanks, Kirk On Wed, Feb 26, 2025, at 5:15 PM, Chia-Ping Tsai wrote: > hi David > > I apologize for not testing the release candidate (RC) as I focused on > reviewing the documentation. I have created tickets to address issues in the > documentation [0][1][2][3], which will be merged into 4.0 as the risk is > minimal. > > Please let me know if you have any other options for those tickets. > > [0] https://issues.apache.org/jira/browse/KAFKA-18869 > [1] https://issues.apache.org/jira/browse/KAFKA-18868 > [2] https://issues.apache.org/jira/browse/KAFKA-18850 > [3] https://issues.apache.org/jira/browse/KAFKA-18849 > > Best, > Chia-Ping > > On 2025/02/22 10:16:43 David Jacot wrote: > > Hello Kafka users, developers and client-developers, > > > > This is the first candidate for release of Apache Kafka 4.0.0. We > > still have some remaining blockers but we figured that getting a first > > release candidate will help the community to test this major release. > > > > - This is the first release without Apache Zookeeper > > - The Next Generation of the Consumer Rebalance Protocol is Generally > > Available > > - The Transactions Server-Side Defense (Phase 2) is Generally Available > > - Queues for Kafka is in Early Access > > - Kafka uses log4j2 > > - Drop broker and tools support for Java 11 > > - Remove old client protocol API versions > > > > Release notes for the 4.0.0 release: > > https://dist.apache.org/repos/dist/dev/kafka/4.0.0-rc0/RELEASE_NOTES.html > > > > *** Please download and test the release. Voting is not necessary as > > we still have blockers. > > > > Kafka's KEYS file containing PGP keys we use to sign the release: > > https://kafka.apache.org/KEYS > > > > * Release artifacts to be voted upon (source and binary): > > https://dist.apache.org/repos/dist/dev/kafka/4.0.0-rc0/ > > > > * Docker release artifacts to be voted upon: > > apache/kafka:4.0.0-rc0 > > apache/kafka-native:4.0.0-rc0 (Building the native image failed, I > > need to investigate it) > > > > * Maven artifacts to be voted upon: > > https://repository.apache.org/content/groups/staging/org/apache/kafka/ > > > > * Javadoc: > > https://dist.apache.org/repos/dist/dev/kafka/4.0.0-rc0/javadoc/ > > > > * Tag to be voted upon (off 4.0 branch) is the 4.0.0 tag: > > https://github.com/apache/kafka/releases/tag/4.0.0-rc0 > > > > * Documentation: > > https://kafka.apache.org/40/documentation.html > > > > * Protocol: > > https://kafka.apache.org/40/protocol.html > > > > * Successful CI builds for the 4.0 branch: > > Unit/integration tests: > > https://github.com/apache/kafka/actions/runs/13459676207 > > System tests: TBD > > > > * Successful Docker Image Github Actions Pipeline for 4.0 branch: > > Docker Build Test Pipeline (JVM): > > https://github.com/apache/kafka/actions/runs/13471603921 > > Docker Build Test Pipeline (Native): > > https://github.com/apache/kafka/actions/runs/13471605941 > > > > /************************************** > > > > Thanks, > > David > > >
