Apache Kafka 4.3.1 was released. It contains a critical memory-leak bug fix for #KafkaStreams. Thanks to our RM Bill Bejeck for the quick turnaround on this downloads.apache.org/kafka/4.3.1/...

Apache Kafka 4.2.1 landed. It contains a critical broker side bug-fix for the new “streams” group. If you did hold back so far, it’s time to upgrade and adopt now! downloads.apache.org/kafka/4.2.1/...

lukastymo.com/posts/028-st...

Congrats to Kirk True for becoming our latest committer!

While we are slowly heading into 4.3.0 release, we have some other good news for you: Over the last weeks, we released 3.9.2, 4.0.2, and 4.1.2 bug-fix releases! Thanks for all 57/44/39 contributors and our RMs PoAn Yang, Viktor Somogyi-Vass, and Andrew Schofield.

We are happy to announce that Viktor Somogyi-Vass accepted our invitation to join the PMC. Congratulations Viktor!

We are happy to announce that Andrew Schofield accepted our invitation to join the PMC. Congratulations Andrew!

We are happy to announce that Christo Lolov accepted our invitation to join the PMC. Congratulations Christo!

We are happy to announce that Kamal Chandraprakash accepted our invitation to join the PMC. Congratulations Kamal!

We are happy to announce that Lianet Magrans accepted our invitation to join the PMC. Congratulations Lianet!

The recent 4.2 release is one of the largest milestones for Kafka Streams so far. The new “streams” groups introduce Kafka Streams specific RPCs into the protocol, making Kafka Streams more than just a wrapper around consumer/producer clients, and a first class citizen. \1

We are happy to announce Apache Kafka 4.2.0! Highlights are: Queues for Kafka and the new #KafkaStreams "streams" groups. Thanks to all the 155 contributors and our RM Christo Lolov. More details on the web page: kafka.apache.org/blog/2026/01...

Great stuff about Kafka Streams! Check it out! medium.com/@souquieres....

Souquieres Adam – Medium

Read writing from Souquieres Adam on Medium. Writing about production streaming and data systems. Focus on trade-offs, not trends. Experience-based, not promotional.

medium.com

There is a new KIP-1244 proposing to deprecate the Kafka Streams Scala API, and remove it with the next major release. Please join the discussion on the dev mailing list if this concerns you.

🚀 I've built a new interactive simulation of #Kafka Streams, showcasing state stores! See state stores being restored, switch between RocksDB & in-memory state store behavior,restart tasks. Great for understanding or explaining Kafka Streams! Try it here: kafkastreamsfieldguide.com/tools/state-...

We are happy to share that the Apache Kafka 4.1.1 bug-fix release is now available! It contains a critical memory-leak fix for #KafkaStreams and many other fixes. For details see kafka.apache.org/blog#apache_... Thanks to 32 contributors and Lianet Magrans as our RM.

Apache Kafka

Apache Kafka: A Distributed Streaming Platform.

kafka.apache.org

Sub-topologies and co-partitioning are imported concepts. Nice blog post from Expedia: medium.com/expedia-grou...

Colocating Input Partitions with Kafka Streams When Consuming Multiple Topics: Sub-Topology Matters!

Understanding how sub-topology design influences partition co-location

medium.com

We are excited to announce the Apache Kafka 4.0.1 bug-fix release, containing over 40 fixes! Thanks to 53 contributors and your RM Christo Lolov. For more details, checkout the announcement: kafka.apache.org/blog#apache_...

Apache Kafka

Apache Kafka: A Distributed Streaming Platform.

kafka.apache.org

🚨Kafka Streams 4.1.0 contains a memory leak regression bug: issues.apache.org/jira/browse/... Be careful upgrading, or wait for 4.1.1 bug-fix release. We plan to get it out quickly.

Any KIP-1071 experience out there? Asking for a friend.

🚨 Breaking News from Community Over Code 🚨 Introducing The ASF’s New Logo buff.ly/DzgT82w #CommunityOverCode #opensource

Apache Kafka 4.1.0 was release! Most exciting, the new “streams” rebalance protocol is available as early access. We are happy to announce the Apache Kafka 4.1.0 release! Please try it out, and let us know how it goes! kafka.apache.org/blog#apache_...

Apache Kafka

Apache Kafka: A Distributed Streaming Platform.

kafka.apache.org

While we are waiting for Apache Kafka 4.1.0 release, the development does not stop. We just completed KIP-1034 (cwiki.apache.org/confluence/d...) which adds a DLQ feature to Kafka Streams. Very exciting!

Next at #Current25 a panel discussion on the past, present and future of @kafkastreams.bsky.social. I love the background...the likeness is uncanny...

Apache Kafka 3.9.1 is now available for download: buff.ly/5ONjJgB This bug-fix release has several fixes, and most importantly, it adds Java 23 support. #opensource

Apache Kafka 4.0 was released recently. We got a couple of a cool KIPs shipped. KIP-1065: cwiki.apache.org/confluence/p... The ProductionExceptionHandler becomes more flexible. It’s now also called for retriable errors. This allows you to break (previously infinite) retry loops. \1

Next up in the Kafka Streams 101 series: performance optimization! Admittedly this one goes way beyond just the "101" level, with general tips to incredibly specific optimization techniques. Check it out to get a handle on your application's performance: bit.ly/43zXoQM

Kafka Streams 101: Optimizing your apps for maximum performance

Learn the concepts, configs, and application design strategies to get your Kafka Streams apps running as optimally as possible.

bit.ly

@intellijidea.com's IDE has a great Apache Kafka plugin. This is a @kafkastreams.bsky.social's session window changelog topic -- maybe I can figure out how to get support natively for Kafka Stream windowing keys.

Writing and a running a Kafka Streams app can be trickier than you'd think! We have some basic examples in the repo but they don't cover everything. Glad to have more material focused on helping new people get into Kafka Streams!

Sophie Blee-Goldman@ableegoldman.bsky.social · last yr.

Next entry in the Kafka Streams 101 series: application lifecycle. Very beginner friendly, but even the pros might find a useful tip or two -- for example: have you heard of the new standby task listener? Check it out: www.responsive.dev/blog/app-lif...

We're keeping the ball rolling on the Kafka Streams 101 series with yet another blog post! This time the focus is on configuration, and breaking down the most important configs to focus on for various needs (such as correctness, resiliency, etc) Check it out here: www.responsive.dev/blog/importa...

Kafka Streams 101: The Most Important Configs

Learn which configurations are most critical for a reliable and efficient deployment

responsive.dev