Thanks for confirming, Matthias! I am closing this voting thread and I will be creating a new release candidate later today/tomorrow!
Best, Christo On Mon, 8 Sept 2025 at 21:42, Matthias J. Sax <[email protected]> wrote: > Thank you Christo. > > We just completed the work to resolve KAFKA-19668. > > - https://github.com/apache/kafka/pull/20470 > - https://github.com/apache/kafka/pull/20484 > - https://github.com/apache/kafka-site/pull/721 > - https://github.com/apache/kafka/pull/20506 > > > -Matthias > > > On 9/3/25 9:13 AM, Christo Lolov wrote: > > Heya Matthias, > > > > I have no issue with creating a new RC once the solution is in. The issue > > does sound critical enough to be fixed given that the previous method was > > removed. > > > > Best, > > Christo > > > > On Wed, 3 Sept 2025 at 17:58, Matthias J. Sax <[email protected]> wrote: > > > >> Hello, > >> > >> I hate to be the messenger (again), but we just found another critical > >> bug in Kafka Streams: https://issues.apache.org/jira/browse/KAFKA-19668 > >> > >> This one is a little bit more tricky, as it is technically not a > >> regression, ie, the issue exists since AK 3.3.0 release. However, with > >> AK 4.0.0 the problem become more real. Background: > >> > >> In AK 3.3.0 we added `processValues()` function (which has a bug we want > >> to fix now). The idea was, that `processValues()` would replace > >> `transformValues()` and we deprecated `transformValues()` in the same > >> release (AK 3.3). > >> > >> However, we don't know how many people actually migrated from > >> `transfromValues()` to `processValues()` in 3.x releases. With 4.0.0 > >> however, we did finally remove `transformValues()`, and thus users of > >> `transformValues()` are now forced to make the migration. > >> > >> Hence, we see it as critical issue for 4.x releases, and would like to > >> get a bug-fix included into 4.0.1. > >> > >> I am currently working on a PR (will open it later today, it's > >> technically a one-liner fix), but wanted to get this message out asap, > >> to assess how we think about this problem, and if we should get a new > >> RC? Getting a new RC might be simplest (even if the bug is not a > >> regression), instead of doing a 4.0.2 bug-fix release as follow up. > >> > >> Thoughts? > >> > >> Thanks a lot, > >> -Matthias > >> > >> > >> On 9/3/25 8:14 AM, Christo Lolov wrote: > >>> Hello! > >>> > >>> Thank you everyone for carrying out checks and pointing out misses on > my > >>> side! > >>> > >>> I have opened 2 PRs against the asf-site repository: > >>> One contains the Javadocs as per RC1 - > >>> https://github.com/apache/kafka-site/pull/718 > >>> The other contains the site-docs as per RC1 - > >>> https://github.com/apache/kafka-site/pull/719 > >>> > >>> I noticed that on the site-docs there is a big diff generated for the > >>> protocol_messages.html, but on a spot-check these changes are part of > >> Kafka > >>> since the 4.0.0 release. Happy to correct any deficiencies on my side > if > >> I > >>> am overlooking something obvious. > >>> > >>> Thanks once again for all the help! > >>> > >>> Best, > >>> Christo > >>> > >>> On Wed, 3 Sept 2025 at 15:19, Hong-Yi Chen <[email protected]> wrote: > >>> > >>>> Hi Christo, > >>>> > >>>> I verified 4.0.1-rc1 as follows: > >>>> > >>>> - Built and ran all unit and integration tests from the source tarball > >>>> (OpenJDK 23 Zulu) > >>>> - Verified basic produce and consume functionality > >>>> - Verified signatures and checksums of the downloaded artifacts > >>>> > >>>> +1 (non-binding) > >>>> > >>>> Thanks for the release! > >>>> Hong-Yi Chen > >>>> > >>>> Christo Lolov <[email protected]> 於 2025年8月19日 週二 下午11:43寫道： > >>>> > >>>>> Hello Kafka users, developers and client-developers, > >>>>> > >>>>> This is the second 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-rc1/RELEASE_NOTES.html > >>>>> > >>>>> *** Please download, test and vote by Tuesday August 26. > >>>>> > >>>>> 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-rc1/ > >>>>> > >>>>> * Docker release artifacts to be voted upon: > >>>>> apache/kafka:4.0.1-rc1 > >>>>> apache/kafka-native:4.0.1-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/4.0.1-rc1/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-rc1 > >>>>> > >>>>> * Successful CI builds for the 4.0 branch: > >>>>> Unit/integration tests: > >>>>> https://github.com/apache/kafka/actions/runs/17041863563 > >>>>> > >>>>> * Successful Docker Image Github Actions Pipeline for 4.0 branch: > >>>>> Docker Build Test Pipeline (JVM): > >>>>> https://github.com/apache/kafka/actions/runs/17068524479 > >>>>> Docker Build Test Pipeline (Native): > >>>>> https://github.com/apache/kafka/actions/runs/17068533707 > >>>>> > >>>>> Thanks, > >>>>> Christo > >>>>> > >>>> > >>> > >> > >> > > > >
