Hi folks, I tested upgrading Kafka from both 3.7.2 and 3.8.1 to 4.1.0 and everything seems good: - Three-node KRaft cluster; verified produce/consume records worked correctly using `kafka-producer-perf-test.sh` and `kafka-console-consumer.sh` before and after each server upgrade. - After upgrading one node to 4.1.0, saw repeated `The node does not support UPDATE_RAFT_VOTER` logs — expected since server with older versions don't support this API. - Once all nodes were upgraded, the message disappeared. Everything worked as expected.
+1 (non-binding) Best, Kuan-Po Tseng On Tue, Jul 22, 2025 at 11:03 PM Chia-Ping Tsai <chia7...@gmail.com> wrote: > hi > If anyone wants to test 4.1.0-RC1 without the backport fix, please simply > configure the jdk_version to use another image. For example: > > jdk_version="openjdk:17-bullseye" /bin/bash tests/docker/run_tests.sh > > Best, > Chia-Ping > > Josep Prat <josep.p...@aiven.io.invalid> 於 2025年7月22日 週二 下午10:56寫道： > > > Hi Mickael, > > I don't think we need a new RC just because of these files. Technically > > speaking these files are part of the source tarball (which we release), > but > > as they are test files, I wouldn't consider them as a blocker that would > > grant a new RC. > > > > Best, > > > > On Tue, Jul 22, 2025 at 4:51 PM Mickael Maison <mickael.mai...@gmail.com > > > > wrote: > > > > > Hi, > > > > > > Quick update regarding the system tests. My environment is back but > > > now we're hitting https://issues.apache.org/jira/browse/KAFKA-19501. > > > > > > Debian buster which is used in the system tests is out of support and > > > it's apt repository has now been archived. It worked till last week > > > but now it's gone so we get an error when building the Docker image. > > > We had only updated trunk to use bullseye. I've just backported the > > > fix to 4.1: > > > > > > https://github.com/apache/kafka/commit/d5a3acda897890379edb8819f15b144fcea564b0 > > > > > > The fix is only in tests/docker/Dockerfile and tests/docker/ducker-ak. > > > My understanding is that these files are not part of any of the > > > release artifacts. > > > So I'm considering keeping the RC1 artifacts and running the system > > > tests with the fix. > > > > > > Let me know if my understand is incorrect, or if you'd prefer building > > > a new RC regardless. Obviously if we find issues with RC1, we'll do > > > another RC anyway. > > > > > > Thanks, > > > Mickael > > > > > > > > > > > > On Mon, Jul 21, 2025 at 5:04 PM Mickael Maison < > mickael.mai...@gmail.com > > > > > > wrote: > > > > > > > > Hello Kafka users, developers and client-developers, > > > > > > > > This is the second candidate for release of Apache Kafka 4.1.0. > > > > > > > > The release brings many new features and improvements: > > > > - Mechanism for plugin to register metrics > > > > - Allow running multiple versions of connector plugins > > > > - Queue are now in preview access > > > > - New Streams rebalance protocol in early access > > > > - Support for OAuth jwt-bearer grant type > > > > - Improved metadata replication > > > > > > > > Release notes for the 4.1.0 release: > > > > > > > > > > https://dist.apache.org/repos/dist/dev/kafka/4.1.0-rc1/RELEASE_NOTES.html > > > > > > > > *** Please download, test and vote by Friday July 25. > > > > > > > > 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/4.1.0-rc1/ > > > > > > > > * Docker release artifacts to be voted upon: > > > > apache/kafka:4.1.0-rc1 > > > > apache/kafka-native:4.1.0-rc1 > > > > > > > > * 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/4.1.0-rc1/javadoc/ > > > > > > > > * Tag to be voted upon (off 4.1 branch) is the 4.1.0 tag: > > > > https://github.com/apache/kafka/releases/tag/4.1.0-rc1 > > > > > > > > * Documentation: > > > > https://kafka.apache.org/41/documentation.html > > > > PR (https://github.com/apache/kafka-site/pull/702) is not merged yet > > > > > > > > * Protocol: > > > > https://kafka.apache.org/41/protocol.html > > > > PR (https://github.com/apache/kafka-site/pull/702) is not merged yet > > > > > > > > * Successful CI builds for the 4.1 branch: > > > > Unit/integration tests: > > > https://github.com/apache/kafka/actions/runs/16415760777 > > > > System tests: The environment I use for running the system tests is > > > > under maintenance. If someone can run the system tests, go ahead. > > > > Otherwise I'll send an update once I'm able to run them. > > > > > > > > * Successful Docker Image Github Actions Pipeline for 4.1 branch: > > > > Docker Build Test Pipeline (JVM): > > > > https://github.com/apache/kafka/actions/runs/16415783067 > > > > Docker Build Test Pipeline (Native): > > > > https://github.com/apache/kafka/actions/runs/16415786103 > > > > > > > > Thanks, > > > > Mickael > > > > > > > > > -- > > [image: Aiven] <https://www.aiven.io> > > > > *Josep Prat* > > Sr. Engineering Director, Streaming Services, *Aiven* > > josep.p...@aiven.io | +491715557497 > > aiven.io <https://www.aiven.io> | < > https://www.facebook.com/aivencloud > > > > > <https://www.linkedin.com/company/aiven/> < > > https://twitter.com/aiven_io> > > *Aiven Deutschland GmbH* > > Alexanderufer 3-7, 10117 Berlin > > > > Geschäftsführer: Oskari Saarenmaa, Hannu Valtonen, > > > > Kenneth Chen > > Amtsgericht Charlottenburg, HRB 209739 B > > >
