David, thanks for running this behemoth of a release. With the help of my coworker Mahsa Seifikar, we have verified the following upgrade scenario:
* Provision a ZK based Kafka cluster on 3.5 and create some topics * Upgrade to 3.9 * Migrate to KRaft * Upgrade to 4.0 We found a few docs issues which have since been fixed. One minor 3.9 docs issue is still pending, but that's not a blocker. I also ran through the quickstart. +1 binding -David A On Fri, Mar 14, 2025 at 7:57 AM Federico Valeri <fedeval...@gmail.com> wrote: > Hi David, I've tested the RC4 and this is what I've done: > > - Used the binaries to create a cluster and run clients from exampled > module > - Tested the upgrade issue we found in KAFKA-18979 > - Tested the dynamic quorum feature (both scale up and down) > - Tested group.protocol=consumer with a simple Java app > - Browsed the documentation and javadoc > - Tested the Docker images > > +1 non binding > > Thanks for running the release. > > Cheers > Fede > > > On Fri, Mar 14, 2025 at 11:11 AM David Jacot <da...@apache.org> wrote: > > > > Hello Kafka users, developers and client-developers, > > > > This is the fourth candidate for release of Apache Kafka 4.0.0. > > > > - 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-rc4/RELEASE_NOTES.html > > > > *** Please download, test and vote by Monday, March 17, 9am PT. > > > > 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-rc4/ > > > > * Docker release artifacts to be voted upon: > > apache/kafka:4.0.0-rc4 > > apache/kafka-native:4.0.0-rc4 > > > > * 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-rc4/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-rc4 > > > > * 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/13846870683 > > System tests: > https://confluent-open-source-kafka-branch-builder-system-test-results.s3-us-west-2.amazonaws.com/trunk/2025-03-13--001.6a14e68a-4791-44eb-a6be-24ce25bc1678--1741882266--apache--4.0--8f765a1886/report.html > > > > * Successful Docker Image Github Actions Pipeline for 4.0 branch: > > Docker Build Test Pipeline (JVM): > > https://github.com/apache/kafka/actions/runs/13852844456 > > Docker Build Test Pipeline (Native): > > https://github.com/apache/kafka/actions/runs/13853116713 > > > > /************************************** > > > > Thanks, > > David Jacot > -- David Arthur
