Kafka

Hi Omnia, Thanks for the RC. There seems to be the same problems as with the 4.2.2 RC and the staged Maven artifacts seem to be missing in the staging repo. (I wonder if for some reason both RCs were dropped by the Maven repo or if there is some issue with doing two releases in parallel and you are overwriting each other 🤔) Thanks Jakub On Tue, Sep 22, 2026 at 4:10 PM Omnia Ibrahim <o.g.h.ibrahim@gmail.com> wrote: > Hello Kafka users, developers and client-developers, > > This is the 2nd 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://dist.apache.org/repos/dist/dev/kafka/4.4.0-rc1/RELEASE_NOTES.html > > Please download, test and vote by Friday, September 25, 2026, 12:30pm BST > (4:30am PT) > > Kafka's KEYS file containing PGP keys we use to sign th...

Hi Omnia I tested the 4.4 branch and encountered a test failure, but it is unrelated to 4.4 branch. see https://issues.apache.org/jira/browse/KAFKA-21146 for details Best, Chia-Ping Omnia Ibrahim <o.g.h.ibrahim@gmail.com> 於 2026年9月23日週三 下午6:18寫道： > Adding both users and Kafka-clients > > > On 23 Sep 2026, at 11:11, Omnia Ibrahim <o.g.h.ibrahim@gmail.com> wrote: > > > > Here is the report for system testing > > > > > https://confluent-open-source-kafka-branch-builder-system-test-results.s3-us-west-2.amazonaws.com/trunk/2026-09-22--001.1442301f-18b4-4a90-a790-4f8550f93d20--1790111851--apache--4.4--812f9108eb/report.html > > The two failed test cases are same as the one mentioned in 4.3.1 RC2 so > not new issue > > > >> On 22 Sep 2026, at 15:09, Omnia Ibrahim <o.g.h.ibrahim@gmail.com> > wrote: > >> > >> Hello Kafka users, developers and client-developers, ...

Adding both users and Kafka-clients > On 23 Sep 2026, at 11:11, Omnia Ibrahim <o.g.h.ibrahim@gmail.com> wrote: > > Here is the report for system testing > > https://confluent-open-source-kafka-branch-builder-system-test-results.s3-us-west-2.amazonaws.com/trunk/2026-09-22--001.1442301f-18b4-4a90-a790-4f8550f93d20--1790111851--apache--4.4--812f9108eb/report.html > The two failed test cases are same as the one mentioned in 4.3.1 RC2 so not new issue > >> On 22 Sep 2026, at 15:09, Omnia Ibrahim <o.g.h.ibrahim@gmail.com> wrote: >> >> Hello Kafka users, developers and client-developers, >> >> This is the 2nd 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://dist.apache.org/repos/dist/dev/kafka/4.4.0-rc1/RELEASE_NOTES.html...

Hi Benson, Yes, your steps look correct to me. The migration to combined nodes should work. Just be noted, if you want to add some lagged nodes into the voters, it might impact the quorum because it needs the majority of nodes to be caught up. Thank you, Luke On Wed, Sep 23, 2026 at 1:55 PM Xiong, Benson via users < users@kafka.apache.org> wrote: > + kafka dev group... > > From: Xiong, Benson via users <users@kafka.apache.org> > Date: Tuesday, September 22, 2026 at 17:56 > To: users@kafka.apache.org <users@kafka.apache.org> > Cc: Zhang, Vinson <vinson.zhang@sap.com>; Yang, Yuanhao < > yuanhao.yang@sap.com>; Zhang, Reggie <reggie.zhang@sap.com>; Xiong, > Benson <benson.xiong01@sap.com> > Subject: Is KRaft dedicated controller(static quorum) → combined mode > migration supported in kafka 3.9.1 > > Hi Kafka community, > > > I’d like to confirm whether an in-place KRaft to...

+ kafka dev group... From: Xiong, Benson via users <users@kafka.apache.org> Date: Tuesday, September 22, 2026 at 17:56 To: users@kafka.apache.org <users@kafka.apache.org> Cc: Zhang, Vinson <vinson.zhang@sap.com>; Yang, Yuanhao <yuanhao.yang@sap.com>; Zhang, Reggie <reggie.zhang@sap.com>; Xiong, Benson <benson.xiong01@sap.com> Subject: Is KRaft dedicated controller(static quorum) → combined mode migration supported in kafka 3.9.1 Hi Kafka community, I’d like to confirm whether an in-place KRaft topology change from dedicated controllers(static quorum) to combined broker/controller nodes is officially supported? For example: Current topology: Controllers: 101,102,103 with process.roles=controller Brokers: 1,2,3 with process. Roles=broker Current quorum: controller.quorum.voters=101@host1:9093,102@host2:9093,103@host3:9093 Target topology: Nodes: 1,2,3 with process.roles=broker, controller Target quorum: control...

Hi Kafka community, I’d like to confirm whether an in-place KRaft topology change from dedicated controllers(static quorum) to combined broker/controller nodes is officially supported? For example: Current topology: Controllers: 101,102,103 with process.roles=controller Brokers: 1,2,3 with process. Roles=broker Current quorum: controller.quorum.voters=101@host1:9093,102@host2:9093,103@host3:9093 Target topology: Nodes: 1,2,3 with process.roles=broker, controller Target quorum: controller.quorum.voters=1@host1:9093,2@host2:9093,3@host3:9093 I could not find this topology-change path documented in the Apache Kafka docs, so I’d like to confirm: 1. Is this migration path officially supported? 2. Is it safe to change broker nodes from `process.roles=broker` to `process.roles=broker,controller` without wiping/reformatting storage? Also without any impact to the data state(data integrity and their pub sub state) in kafka? 3. Is replacing the controller ...

Hello Kafka Team, I see there is already a JIRA item to upgrade jetty version to 12.0.39 is in resolved state. However this jira item is not tagged to any kafka release. So need a confirmation whether Kafka 4.4.0 will be using this upgraded jetty version. [KAFKA-21139] Update Jetty to 12.0.39 - ASF Jira<https://issues.apache.org/jira/browse/KAFKA-21139> Regards Vivek From: Vivek Agarwal B Sent: 15 September 2026 10:47 To: users@kafka.apache.org Cc: Ashish Verma V <ashish.v.verma@ericsson.com>; Mayank Maheshwari M <mayank.m.maheshwari@ericsson.com> Subject: Kafka jetty vulnerabilities fixes Hello Kafka Team, Below are the vulnerabilities which are identified in Jetty v12.0.37. They are fixed in jetty version 12.0.38. Kafka 4.4.0 rc still uses Jetty 12.0.37, could you please confirm if the formal kafka 4.4.0 release will upgrade the jetty version to 12.0.38? * CVE-2026-12611 (HTTP/2 thread exhaustion DoS) * CVE-2026-19203 (HTTP Requ...