Hi Matthias Since 909 is marked as an experimental feature, disabling it in KS and KC seems reasonable to me. In fact, there is already a PR https://github.com/apache/kafka/pull/23364
In the meantime, we keep spotting other busy loop issues, like https://github.com/apache/kafka/pull/23357 and https://github.com/apache/kafka/pull/23348. I hope we can fix as many as possible. However, as mentioned above, it is an experimental feature, so we could pull our punches a bit in order to keep 4.4.0 on schedule. Best, Chia-Ping > Matthias J. Sax <[email protected]> 於 2026年9月6日 凌晨2:43 寫道： > > Thanks. Merged and cherry-picked https://github.com/apache/kafka/pull/23341 > > > > > I was also recently looking into > https://issues.apache.org/jira/browse/KAFKA-20939 which was a blocker, too. > > Wondering if disabling KIP-909 behavior on the clients by default is > sufficient? -- Both Kafka Connect and Kafka Streams, expose all client config > so users could enable this feature. I did look into both cases. > > For KS, it seems overall to be "safe", ie, nothing really bad would happen if > a user enables KIP-909, but there is also no benefit. The goal of KIP-909 is > to be more resilient against DNS changes, but KS would just crash with an > error and shut down hitting the new exception. > > However, for KC it seems to be problematic, as KC could enter a bad state it > cannot recover from, and it does not error out cleanly either. -- I am not > familiar with Connect and can only parrot what Claude spit out. Might be > worth to double check by someone familiar with Connect? > > Maybe we should remove the new config from both KS and KC as quick fix for > 4.4 release, and do proper follow-up work on each to make both KP-909 ready? > > Thoughts? > > > > -Matthias > > > > >> On 9/5/26 12:25 AM, [email protected] wrote: >> I will wait for >> https://issues.apache.org/jira/plugins/servlet/mobile#issue/KAFKA-15370 >> before triggering the build for RC1 hopefully by next week we will have all >> these majors and blockers merged >> Sent from my iPhone >>>> On 4 Sep 2026, at 17:43, Justine Olshan via dev <[email protected]> >>>> wrote: >>> >>> Yes, Chia-Ping, Ritika was writing the PR. It is merged now. Thanks folks. >>> >>>> On Fri, Sep 4, 2026 at 8:31 AM Chia-Ping Tsai <[email protected]> wrote: >>>> >>>> hi Matthias >>>> >>>> I have reviewed the PR, and it makes sense to backport it to 4.4. >>>> >>>> Best, >>>> Chia-Ping >>>> >>>>> On 2026/09/02 23:16:54 "Matthias J. Sax" wrote: >>>>> Hi, >>>>> >>>>> I just found a new blocker for 4.4: >>>>> >>>> https://urldefense.com/v3/__https://issues.apache.org/jira/browse/KAFKA-21025__;!!Ayb5sqE7!ss2r4TlYY9cZOKDp6WcSQoqGBuvIeXZ0s9GFAXgek9IdxwxcvKFEyz2IHTrFRGCu5vcceK6aMvhdJW-zIJ0B$ >>>>> >>>>> Please let me know if you think it's not a blocker. Will open a PR for >>>>> it shortly. >>>>> >>>>> >>>>> -Matthias >>>>> >>>>> On 8/28/26 7:26 AM, Chia-Ping Tsai wrote: >>>>>> Hi Mickael >>>>>> >>>>>> The fix looks cool, so +1 to backporting it to the 4.4 branch >>>>>> >>>>>> BTW, I left a comment ( >>>>>> >>>> https://urldefense.com/v3/__https://github.com/apache/kafka/pull/23258*discussion_r3881351602__;Iw!!Ayb5sqE7!ss2r4TlYY9cZOKDp6WcSQoqGBuvIeXZ0s9GFAXgek9IdxwxcvKFEyz2IHTrFRGCu5vcceK6aMvhdJeTjr7KW$ >>>> ) >>>>>> >>>>>> Best, >>>>>> Chia-Ping >>>>>> >>>>>> Mickael Maison <[email protected]> 於 2026年8月28日週五 下午6:47寫道： >>>>>> >>>>>>> Hi, >>>>>>> >>>>>>> I merged >>>> https://urldefense.com/v3/__https://github.com/apache/kafka/pull/23258__;!!Ayb5sqE7!ss2r4TlYY9cZOKDp6WcSQoqGBuvIeXZ0s9GFAXgek9IdxwxcvKFEyz2IHTrFRGCu5vcceK6aMvhdJXdw0cYl$ >>>> to trunk. >>>>>>> It should help avoid a data loss scenario on clean shutdown. >>>>>>> Can we apply it to 4.4? >>>>>>> >>>>>>> Thanks, >>>>>>> Mickael >>>>>>> >>>>>>> On Thu, Aug 27, 2026 at 12:29 PM Chia-Ping Tsai <[email protected]> >>>>>>> wrote: >>>>>>>> >>>>>>>> Unfortunately, there is another blocker ( >>>>>>>> >>>> https://urldefense.com/v3/__https://issues.apache.org/jira/browse/KAFKA-20970__;!!Ayb5sqE7!ss2r4TlYY9cZOKDp6WcSQoqGBuvIeXZ0s9GFAXgek9IdxwxcvKFEyz2IHTrFRGCu5vcceK6aMvhdJW3F3Zxx$ >>>> ) - I forgot to add the >>>>>>>> 4.4 label :( >>>>>>>> >>>>>>>> It is almost there, and I will take another look soon >>>>>>>> >>>>>>>> >>>>>>>> Omnia Ibrahim <[email protected]> 於 2026年8月27日週四 上午4:01寫道： >>>>>>>> >>>>>>>>> Chia if this is the last blocker shall I start RC1 >>>>>>>>> >>>>>>>>>> On 25 Aug 2026, at 07:30, Chia-Ping Tsai <[email protected]> >>>>>>> wrote: >>>>>>>>>> >>>>>>>>>> hi Omnia >>>>>>>>>> >>>>>>>>>> I have filed a blocker issue ( >>>>>>>>> >>>> https://urldefense.com/v3/__https://issues.apache.org/jira/browse/KAFKA-20982__;!!Ayb5sqE7!ss2r4TlYY9cZOKDp6WcSQoqGBuvIeXZ0s9GFAXgek9IdxwxcvKFEyz2IHTrFRGCu5vcceK6aMvhdJaPHDtG3$ >>>> ) to correct the >>>>>>>>> docker-compose SASL settings, which currently block clients from >>>>>>> connecting >>>>>>>>> to the SASL listeners. >>>>>>>>>> >>>>>>>>>> Best, >>>>>>>>>> Chia-Ping >>>>>>>>>> >>>>>>>>>> On 2026/08/21 17:09:56 Omnia Ibrahim wrote: >>>>>>>>>>> Hello Kafka users, developers and client-developers, >>>>>>>>>>> >>>>>>>>>>> This is the 1st candidate for release of Apache Kafka 4.4.0. >>>>>>>>>>> Apache Kafka 4.4.0 is a minor release that includes 26 KIPs >>>> spanning >>>>>>>>> improvements to all components. >>>>>>>>>>> >>>>>>>>>>> Release notes for the 4.4.0 release: >>>>>>>>>>> >>>>>>>>> >>>>>>> >>>> https://urldefense.com/v3/__https://dist.apache.org/repos/dist/dev/kafka/4.4.0-rc0/RELEASE_NOTES.html__;!!Ayb5sqE7!ss2r4TlYY9cZOKDp6WcSQoqGBuvIeXZ0s9GFAXgek9IdxwxcvKFEyz2IHTrFRGCu5vcceK6aMvhdJd0mH3V9$ >>>>>>>>>>> >>>>>>>>>>> Please download, test and vote by Monday, August 24, 2026 at >>>> 3:00pm >>>>>>> BST >>>>>>>>> (7:00am PT) >>>>>>>>>>> >>>>>>>>>>> Kafka's KEYS file containing PGP keys we use to sign the release: >>>>>>>>>>> >>>> https://urldefense.com/v3/__https://downloads.apache.org/kafka/KEYS__;!!Ayb5sqE7!ss2r4TlYY9cZOKDp6WcSQoqGBuvIeXZ0s9GFAXgek9IdxwxcvKFEyz2IHTrFRGCu5vcceK6aMvhdJdsRfDaA$ >>>>>>>>>>> >>>>>>>>>>> * Release artifacts to be voted upon (source and binary): >>>>>>>>>>> >>>> https://urldefense.com/v3/__https://dist.apache.org/repos/dist/dev/kafka/4.4.0-rc0/__;!!Ayb5sqE7!ss2r4TlYY9cZOKDp6WcSQoqGBuvIeXZ0s9GFAXgek9IdxwxcvKFEyz2IHTrFRGCu5vcceK6aMvhdJfXs_c6l$ >>>>>>>>>>> >>>>>>>>>>> * Docker release artifacts to be voted upon: >>>>>>>>>>> apache/kafka:4.4.0-rc0 >>>>>>>>>>> apache/kafka-native:4.4.0-rc0 >>>>>>>>>>> >>>>>>>>>>> * Maven artifacts to be voted upon: >>>>>>>>>>> >>>>>>> >>>> https://urldefense.com/v3/__https://repository.apache.org/content/groups/staging/org/apache/kafka/__;!!Ayb5sqE7!ss2r4TlYY9cZOKDp6WcSQoqGBuvIeXZ0s9GFAXgek9IdxwxcvKFEyz2IHTrFRGCu5vcceK6aMvhdJVguUyUp$ >>>>>>>>>>> >>>>>>>>>>> * Javadoc: >>>>>>>>>>> >>>>>>>>> >>>>>>> >>>> https://urldefense.com/v3/__https://dist.apache.org/repos/dist/dev/kafka/4.4.0-rc0/javadoc/index.html__;!!Ayb5sqE7!ss2r4TlYY9cZOKDp6WcSQoqGBuvIeXZ0s9GFAXgek9IdxwxcvKFEyz2IHTrFRGCu5vcceK6aMvhdJRSnvMHx$ >>>>>>>>>>> >>>>>>>>>>> * Tag to be voted upon (off 4.4 branch) is the 4.4.0 tag: >>>>>>>>>>> >>>> https://urldefense.com/v3/__https://github.com/apache/kafka/releases/tag/4.4.0-rc0__;!!Ayb5sqE7!ss2r4TlYY9cZOKDp6WcSQoqGBuvIeXZ0s9GFAXgek9IdxwxcvKFEyz2IHTrFRGCu5vcceK6aMvhdJWgHYlqB$ >>>>>>>>>>> >>>>>>>>>>> * Documentation: >>>>>>>>>>> PR: >>>> https://urldefense.com/v3/__https://github.com/apache/kafka-site/pull/905__;!!Ayb5sqE7!ss2r4TlYY9cZOKDp6WcSQoqGBuvIeXZ0s9GFAXgek9IdxwxcvKFEyz2IHTrFRGCu5vcceK6aMvhdJVNqO36I$ >>>>>>>>>>> >>>>>>>>>>> * Protocol: >>>>>>>>>>> PR: >>>> https://urldefense.com/v3/__https://github.com/apache/kafka-site/pull/905__;!!Ayb5sqE7!ss2r4TlYY9cZOKDp6WcSQoqGBuvIeXZ0s9GFAXgek9IdxwxcvKFEyz2IHTrFRGCu5vcceK6aMvhdJVNqO36I$ >>>>>>>>>>> >>>>>>>>>>> * Successful CI builds for the 4.4 branch: >>>>>>>>>>> >>>> https://urldefense.com/v3/__https://github.com/apache/kafka/actions/runs/32487577786__;!!Ayb5sqE7!ss2r4TlYY9cZOKDp6WcSQoqGBuvIeXZ0s9GFAXgek9IdxwxcvKFEyz2IHTrFRGCu5vcceK6aMvhdJU_vr4lk$ >>>>>>>>>>> >>>>>>>>>>> * Docker Build Test Pipeline: >>>>>>>>>>> Blocked by a GitHub Actions allowlist issue (fix pending: >>>>>>>>> >>>> https://urldefense.com/v3/__https://github.com/apache/kafka/pull/23229__;!!Ayb5sqE7!ss2r4TlYY9cZOKDp6WcSQoqGBuvIeXZ0s9GFAXgek9IdxwxcvKFEyz2IHTrFRGCu5vcceK6aMvhdJT5bpOaz$ >>>> ). The RC Docker images >>>>>>>>>>> were built and pushed successfully. >>>>>>>>>>> >>>>>>>>>>> Thanks, >>>>>>>>>>> Omnia >>>>>>>>> >>>>>>>>> >>>>>>> >>>>>> >>>>> >>>>> >>>> >
