Hi Christo, We found and fixed an issue in ShareConsumer: https://issues.apache.org/jira/browse/KAFKA-20052. The fix has already been merged in trunk: https://github.com/apache/kafka/pull/21265. It's a small change but impacts share consumers when the underlying topic is deleted. We prefer to have the fix in 4.2 hence asking will it be appropriate to cherry-pick?
Regards, Apoorv Mittal On Wed, Jan 7, 2026 at 12:09 PM Christo Lolov <[email protected]> wrote: > Heya Lianet! > > Sure, feel free to cherry-pick the fix to 4.2 :) > > Hello Nikita! > > Thanks a lot for identifying the issue! I saw that a commit already > made it on the 4.2 branch, so it will make it in the release :) > > I also saw that version bump for log4j2 made it in the branch as well, > so the only blocker left ought to be the byte buffer usage! > > Best, > Christo > > On Tue, 6 Jan 2026 at 23:22, Nikita Shupletsov <[email protected]> > wrote: > > > > Hi Christo, > > > > I filed a ticket today: > > https://issues.apache.org/jira/browse/KAFKA-20046 and started a > > separate thread for it: > > https://lists.apache.org/thread/yyy7v2bm5jcrktjxthjzvkodw0ly9rgo > > Was wanting to reiterate about it here to make sure it's indeed > > something we want to include in 4.2. > > Thanks! > > > > Nikita Shupletsov > > > > On Tue, Jan 6, 2026 at 12:48 PM Lianet Magrans <[email protected]> > wrote: > > > > > > Hi Christo, > > > > > > We found and fixed an issue affecting the consumer > > > (https://issues.apache.org/jira/browse/KAFKA-20040). It's a very small > > > fix, PR already approved, fixing a race condition that could make the > > > consumer fail unexpectedly on basic poll/unsubscribe flows if the race > > > hits, so I would like to cherry-pick it. Let me know what you think. > > > > > > Thanks! > > > Lianet > > > > > > > > > > > > On Fri, Dec 19, 2025 at 7:23 PM Matthias J. Sax <[email protected]> > wrote: > > > > > > > > Thanks. Seems there is no objections to merge KAFKA-20002 into 4.2 > branch. > > > > > > > > Merged and cherry-picked the PR. > > > > > > > > > > > > -Matthias > > > > > > > > On 12/19/25 8:13 AM, Jun Rao via dev wrote: > > > > > Hi, Christo, > > > > > > > > > > KAFKA-20003 doesn't cause a real problem for 4.2.0. So, I closed > it. > > > > > > > > > > Thanks, > > > > > > > > > > Jun > > > > > > > > > > On Fri, Dec 19, 2025 at 4:03 AM Christo Lolov < > [email protected]> > > > > > wrote: > > > > > > > > > >> Hello! > > > > >> > > > > >> Thanks Matthias and Chia-Ping for letting me know! > > > > >> > > > > >> I have done one more audit on the remaining 9 JIRAs with a 4.2.0 > tag > > > > >> in the release plan. > > > > >> > > > > >> The current blockers are KAFKA-19012, KAFKA-17862 and KAFKA-19999. > > > > >> > > > > >> What is the consensus on KAFKA-20003 - should I be treating it as > a > > > > >> blocker? > > > > >> > > > > >> Matthias's bugfix is KAFKA-20002. > > > > >> > > > > >> I have requested a bit more information about the state of > > > > >> KAFKA-19851, KAFKA-19964, KAFKA-15370 and KAFKA-19891. They aren't > > > > >> currently marked as blockers, but there has been recent activity > on > > > > >> all of them and I would like to understand whether we are aiming > to > > > > >> include them in 4.2 or whether we are bumping them to 4.3. > > > > >> > > > > >> Let me know if I have missed something else! > > > > >> > > > > >> Best, > > > > >> Christo > > > > >> > > > > >> On Wed, 17 Dec 2025 at 16:18, Chia-Ping Tsai <[email protected]> > wrote: > > > > >>> > > > > >>> hi > > > > >>> > > > > >>> there is another crucial issue regarding TV2 ( > > > > >>> https://issues.apache.org/jira/browse/KAFKA-19999) > > > > >>> > > > > >>> I hope we can ship it in 4.2.0 as well > > > > >>> > > > > >>> Best, > > > > >>> Chia-Ping > > > > >>> > > > > >>> Matthias J. Sax <[email protected]> 於 2025年12月17日週三 下午11:57寫道： > > > > >>> > > > > >>>> Hello, > > > > >>>> > > > > >>>> by chance, we found a critical bug in Kafka Streams yesterday: > > > > >>>> https://issues.apache.org/jira/browse/KAFKA-20002 -- PR is > already up. > > > > >>>> It's a trivial fix. > > > > >>>> > > > > >>>> It's not a regression, as the issue was introduced with 4.0 > release, > > > > >> and > > > > >>>> it's also not a blocker, and we are after code freeze. > > > > >>>> > > > > >>>> So want to highlight it. I would like to get it into 4.2.0 > release if > > > > >>>> there are no objections. > > > > >>>> > > > > >>>> > > > > >>>> -Matthias > > > > >>>> > > > > >>>> On 11/28/25 7:14 AM, Christo Lolov wrote: > > > > >>>>> Heya! > > > > >>>>> > > > > >>>>> Added it, thanks for pointing it out. I have done one more > audit and > > > > >>>> reached out to implementers for a couple of KIPs which should > probably > > > > >> be > > > > >>>> moved to a subsequent release! > > > > >>>>> > > > > >>>>> Best, > > > > >>>>> Christo > > > > >>>>> > > > > >>>>>> On 26 Nov 2025, at 06:30, Herman K. Jakobsen < > > > > >> [email protected]> > > > > >>>> wrote: > > > > >>>>>> > > > > >>>>>> Looks like my previous mail unfortunately wasn't sent. > However, > > > > >> could > > > > >>>> we > > > > >>>>>> include KIP-1146 - Anchored Punctuation? The feature is > already > > > > >>>> implemented > > > > >>>>>> and merged to trunk. > > > > >>>>>> > > > > >>>>>> Thanks, > > > > >>>>>> > > > > >>>>>> Herman > > > > >>>>>> > > > > >>>>>>> On 2025/10/30 07:27:22 Christo Lolov wrote: > > > > >>>>>>> Hello! > > > > >>>>>>> > > > > >>>>>>> We have now passed the KIP freeze date for 4.2.0. The next > goal is > > > > >> the > > > > >>>>>>> feature freeze on the 19th of November! > > > > >>>>>>> > > > > >>>>>>> Feel free to reachout on this thread if your changes are not > > > > >> getting > > > > >>>>>>> traction to meet that date! > > > > >>>>>>> > > > > >>>>>>> Best, > > > > >>>>>>> Christo > > > > >>>>>>> > > > > >>>>>>>> On Wed, 22 Oct 2025 at 11:16, Christo Lolov < > [email protected]> > > > > >> wrote: > > > > >>>>>>>> > > > > >>>>>>>> Hello! > > > > >>>>>>>> > > > > >>>>>>>> This is to bump the 4.2.0 thread to the top of the mailing > list! > > > > >>>>>>>> > > > > >>>>>>>> The KIP freeze date is 1 week from today on the 29th of > October. > > > > >>>>>>>> Please ensure that you have the required number of binding > votes > > > > >> for > > > > >>>>>>>> your KIP by that date if you would like it included in > 4.2.0. > > > > >>>>>>>> > > > > >>>>>>>> Best, > > > > >>>>>>>> Christo > > > > >>>>>>>> > > > > >>>>>>>> On Thu, 2 Oct 2025 at 15:08, Mickael Maison < > [email protected]> > > > > >> wrote: > > > > >>>>>>>>> > > > > >>>>>>>>> Hi, > > > > >>>>>>>>> > > > > >>>>>>>>> I think moving code freeze to December 10 makes sense. > > > > >>>>>>>>> Many people will be off the last 2 weeks of December, so > it's > > > > >> best to > > > > >>>>>>>>> not have deadlines then. > > > > >>>>>>>>> > > > > >>>>>>>>> Thanks, > > > > >>>>>>>>> Mickael > > > > >>>>>>>>> > > > > >>>>>>>>> On Thu, Oct 2, 2025 at 3:49 PM Christo Lolov < > [email protected]> > > > > >>>> wrote: > > > > >>>>>>>>>> > > > > >>>>>>>>>> Hello! > > > > >>>>>>>>>> > > > > >>>>>>>>>> Thanks for the review! > > > > >>>>>>>>>> > > > > >>>>>>>>>> I am okay with pulling all dates by 2 weeks earlier in > time > > > > >>>>>> (barring the > > > > >>>>>>>>>> 7th of January one). If there are no objections to the new > > > > >> dates I > > > > >>>>>> will > > > > >>>>>>>>>> update them in the plan tomorrow! > > > > >>>>>>>>>> > > > > >>>>>>>>>> Best, > > > > >>>>>>>>>> Christo > > > > >>>>>>>>>> > > > > >>>>>>>>>> On Thu, 2 Oct 2025 at 07:14, Ismael Juma < > [email protected]> > > > > >>>>>> wrote: > > > > >>>>>>>>>> > > > > >>>>>>>>>>> Hi Christo, > > > > >>>>>>>>>>> > > > > >>>>>>>>>>> Thanks for managing the release and for the proposed > release > > > > >>>>>> plan. > > > > >>>>>>>>>>> > > > > >>>>>>>>>>> Given our desire to ship every 4 months, I think the > proposed > > > > >>>>>> dates should > > > > >>>>>>>>>>> be shifted a bit. The original plan was for 4.1 to ship > in mid > > > > >>>>>> July and for > > > > >>>>>>>>>>> 4.2 to ship in mid November. The former eventually > shipped on > > > > >>>>>> September 2nd > > > > >>>>>>>>>>> and with the current plan would probably result in 4.2 > shipping > > > > >>>>>> in late > > > > >>>>>>>>>>> January/early February. Given where we are, I would > suggest > > > > >>>>>> something like: > > > > >>>>>>>>>>> > > > > >>>>>>>>>>> KIP Freeze: October 29 (Wednesday) > > > > >>>>>>>>>>> Feature Freeze: November 19 (Wednesday) > > > > >>>>>>>>>>> Code Freeze: December 10 (Wednesday) > > > > >>>>>>>>>>> At least four weeks of stabilization will follow Code > Freeze > > > > >>>>>> (taking > > > > >>>>>>>>>>> holidays into account), meaning we expect to release no > earlier > > > > >>>>>> than > > > > >>>>>>>>>>> January 7 2026. > > > > >>>>>>>>>>> > > > > >>>>>>>>>>> Ideally, we'd get RC0 out before the holiday break and > then > > > > >>>>>> complete the > > > > >>>>>>>>>>> release by early/mid January. > > > > >>>>>>>>>>> > > > > >>>>>>>>>>> Thoughts? > > > > >>>>>>>>>>> > > > > >>>>>>>>>>> Ismael > > > > >>>>>>>>>>> > > > > >>>>>>>>>>> On Tue, Sep 30, 2025 at 6:09 AM Christo Lolov < > [email protected] > > > > >>> > > > > >>>>>>>>>>> wrote: > > > > >>>>>>>>>>> > > > > >>>>>>>>>>>> Hello! > > > > >>>>>>>>>>>> > > > > >>>>>>>>>>>> I would like to volunteer to be the release manager for > the > > > > >>>>>> Apache Kafka > > > > >>>>>>>>>>>> 4.2.0 release. > > > > >>>>>>>>>>>> > > > > >>>>>>>>>>>> If no one has any objections, you can find a proposed > release > > > > >>>>>> plan at > > > > >>>>>>>>>>>> > > > > >>>>>> > > > > >> > https://cwiki.apache.org/confluence/display/KAFKA/Release+Plan+4.2.0. > > > > >>>>>>>>>>>> > > > > >>>>>>>>>>>> Thanks, > > > > >>>>>>>>>>>> Christo > > > > >>>>>>>>>>>> > > > > >>>>>>>>>>> > > > > >>>>>>> > > > > >>>> > > > > >>>> > > > > >> > > > > > > > > > >
