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.

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

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_...

🚨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_...

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

@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!

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...

The 2025 blog post series has begun and we're kicking things off with the "official" Kafka Streams upgrade-guide -- check it out for best practices when setting up a new app, rules for safe vs unsafe upgrades, and tips for making the process go smoothly: www.responsive.dev/blog/topolog...

#StreamProcessing with @kafkastreams.bsky.social

Another holiday 🎁 delivered. We completed issues.apache.org/jira/browse/... to remove all deprecated #KafkaStreams APIs for the upcoming #ApacheKafka 4.0 release! It was an outstanding community effort and huge win! We merged 36 PRs from 14 different contributors, removing 13K LOC. \1

Kafka Streams has officially come to Bluesky! Follow this account for updates on everything Kafka Streams and keep up to date with new features, bug fixes, and upcoming KIPs. Long live the otter!