Thanks for the testing Kirk. Can you please file an issue for the repeated
log to make sure it doesn't get lost in this thread?

Ismael

On Thu, Feb 27, 2025 at 2:54 PM Kirk True <k...@kirktrue.pro> wrote:

> 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
> > >
> >
>

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