We got some more insights about the memory leak, and I filed:
https://issues.apache.org/jira/browse/KAFKA-19748
Thanks to Eduwer Camcaro to helping us narrowing down this issue.
The issue seems to only affect 4.1.0+, but not 4.0.x, so from our side,
we can move forward with the current RC.
-Matthias
On 9/30/25 9:36 AM, Jakub Scholz wrote:
Hi Christo,
At least for me, it was a bit confusing from the email thread whether there
would be another RC or not.
But I did some smoke testing with the staged binaries, and I also ran the
Strimzi test suite against it. All seems to work fine. So +1 non-binding
from me.
Thanks for running the release.
Regards
Jakub
On Tue, Sep 30, 2025 at 2:46 PM Christo Lolov <[email protected]>
wrote:
Hello!
A polite bump on this thread. Are there any concerns with the current
release candidate or are people happy to cast votes?
Best,
Christo
On Tue, 23 Sept 2025 at 14:12, Christo Lolov <[email protected]>
wrote:
Heya,
Apologies for the delay, I wasn’t around a computer these last few days.
Let’s cherry-pick it after 4.0.1 unless there is a strong ask from a
couple
more people?
Best,
Christo
On Sun, 21 Sep 2025 at 04:53, Chia-Ping Tsai <[email protected]>
wrote:
hi Christo
Kevin found a compatibility issue (KAFKA-19719) that causes an error
when
using `controller.quorum.voters` together with
`--no-initial-controllers`.
Admittedly, that is a strange usage, but it worked in 3.9.0 since
`--no-initial-controllers` was treated as a no-op.
The bug was introduced in 3.9.1 and 4.0.0, and a patch is already
available. Do you want to include the patch in 4.0.1, or should I do the
cherry-pick after 4.0.1 is released?
Best,
Chia-Ping
On 2025/09/11 10:09:00 Christo Lolov wrote:
Hello Kafka users, developers and client-developers,
This is the third candidate for release of Apache Kafka 4.0.1.
Since this is a patch version it contains the bug fixes outlined in
the
release notes below!
Release notes for the 4.0.1 release:
https://dist.apache.org/repos/dist/dev/kafka/4.0.1-rc2/RELEASE_NOTES.html
*** Please download, test and vote by Wednesday September 17.
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/4.0.1-rc2/
* Docker release artifacts to be voted upon:
apache/kafka:4.0.1-rc2
apache/kafka-native:4.0.1-rc2
* 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/4.0.1-rc2/javadoc/
* Tag to be voted upon (off 4.0 branch) is the 4.0.1 tag:
https://github.com/apache/kafka/releases/tag/4.0.1-rc2
* Successful CI builds for the 4.0 branch:
Unit/integration tests:
https://github.com/apache/kafka/actions/runs/17586456207
* Successful Docker Image Github Actions Pipeline for 4.0 branch:
Docker Build Test Pipeline (JVM):
https://github.com/apache/kafka/actions/runs/17586731957
Docker Build Test Pipeline (Native):
https://github.com/apache/kafka/actions/runs/17587113226
* Documentation updates for website and Javadocs
- https://github.com/apache/kafka-site/pull/719
- https://github.com/apache/kafka-site/pull/723
Thanks,
Christo
