Kafka

Hi, I downloaded the binaries and check the signature. I also ran all tests within the Strimzi project (Apache Kafka on Kubernetes) by using such binaries to build the container images. From regression to upgrade testing everything looks fine. +1 (non binding) Thanks, Paolo. On Tue, 10 Feb 2026 at 16:28, Christo Lolov < christololov@gmail.com > wrote: > Hello Kafka users, developers and client-developers, > > This is the RC4 candidate for release of Apache Kafka 4.2.0. > > This release has many exciting changes: > * Kafka Queues (Share Groups) is now production-ready with new > features like the RENEW acknowledgement type for extended processing > times, adaptive batching for coordinators, and comprehensive lag > metrics. > * Kafka Streams brings the server-side rebalance protocol to GA with a > limited feature set, adds dead letter queue support in exception > handlers, introduces anchored wall-clock punctuation for...

I've opened https://issues.apache.org/jira/browse/KAFKA-20168 to address it Best, Chia-Ping On 2026/02/11 05:00:18 Apoorva Maheshwari via users wrote: > Hello Team, > > Please confirm your plan to release a version that supports Jetty v12.0.25, in order to address Jetty CVE-2025-5115. > > Regards, > Apoorva Maheshwari > > >

Hello Team, Please confirm your plan to release a version that supports Jetty v12.0.25, in order to address Jetty CVE-2025-5115. Regards, Apoorva Maheshwari

Georg, true there are two linger settings - I only mentioned one in the article whoops! Paul From: Georg Friedrich < georg@grid.gg > Date: Wednesday, 11 February 2026 at 11:25 am To: Brebner, Paul via users < users@kafka.apache.org > Subject: RE: Reduced message consumption on Kafka 4.1 compared to 3.9 [You don't often get email from georg@grid.gg . Learn why this is important at https://aka.ms/LearnAboutSenderIdentification ] EXTERNAL EMAIL - USE CAUTION when clicking links or attachments I indeed saw that the ` linger.ms ` default was changed for producers (as said I didn't update the client libs yet). But I was missing the fact that also the server side was now configured using a linger value to write data to disk. Thanks for the post nevertheless. :-) Kind regards Georg Friedrich *From:* Brebner, Paul via users < users@kafka.apache.org > *Sent:* Tuesday, February 10, 2026 at 23:43 *To:* users@kafka.apache.org ...

I indeed saw that the ` linger.ms ` default was changed for producers (as said I didn't update the client libs yet). But I was missing the fact that also the server side was now configured using a linger value to write data to disk. Thanks for the post nevertheless. :-) Kind regards Georg Friedrich *From:* Brebner, Paul via users < users@kafka.apache.org > *Sent:* Tuesday, February 10, 2026 at 23:43 *To:* users@kafka.apache.org < users@kafka.apache.org > *Cc:* Brebner, Paul < Paul.Brebner@netapp.com > *Subject:* RE: Reduced message consumption on Kafka 4.1 compared to 3.9 > Yes, this has caught a few people out, see my blog: > https://www.linkedin.com/pulse/increased-lingering-apache-kafka-40-can-increase-latency-paul-brebner-z7qlc/?trackingId=wDlmi2cTSxmAw8KDTv2Tew%3D%3D > > Regards, Paul > > From: Radu Radutiu < rradutiu@gmail.com > > Date: Wednesday, 11 February 2026 at 12:23 am > To: users@...

Yes, this has caught a few people out, see my blog: https://www.linkedin.com/pulse/increased-lingering-apache-kafka-40-can-increase-latency-paul-brebner-z7qlc/?trackingId=wDlmi2cTSxmAw8KDTv2Tew%3D%3D Regards, Paul From: Radu Radutiu < rradutiu@gmail.com > Date: Wednesday, 11 February 2026 at 12:23 am To: users@kafka.apache.org < users@kafka.apache.org > Subject: Re: Reduced message consumption on Kafka 4.1 compared to 3.9 [You don't often get email from rradutiu@gmail.com . Learn why this is important at https://aka.ms/LearnAboutSenderIdentification ] EXTERNAL EMAIL - USE CAUTION when clicking links or attachments There was a previous message on the list regarding increased latency on upgrade to Kafka 4.0. I believe the cause was: "The batching interval defaults to 5 ms and is controlled by the ` group.coordinator.append.linger.ms ` broker config option.". Try lowering this and see if it helps. Radu On Tue, Feb 10, 2026 at...

Hello Kafka users, developers and client-developers, This is the RC4 candidate for release of Apache Kafka 4.2.0. This release has many exciting changes: * Kafka Queues (Share Groups) is now production-ready with new features like the RENEW acknowledgement type for extended processing times, adaptive batching for coordinators, and comprehensive lag metrics. * Kafka Streams brings the server-side rebalance protocol to GA with a limited feature set, adds dead letter queue support in exception handlers, introduces anchored wall-clock punctuation for deterministic scheduling, and gives users full control over whether to send a leave group request on closing. * This release also delivers significant improvements to consistency and observability: CLI tools now feature standardized arguments like --bootstrap-server across all tools, metric naming has been corrected to follow the kafka.COMPONENT convention, and new idle ratio metrics provide better visibility into controlle...