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Reposted by Matthias J. Sax

The Streaming Otter @thestreamingotter.bsky.social · 1d

taogang.medium.com/the-past-and...

The Past and Present of Stream Processing (Part 13): Kafka Streams — A Lean and Agile King’s Army

Introduction

taogang.medium.com

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Matthias J. Sax @mjsax.bsky.social · 2d

Happy to share, that we did release an update to our @kafkastreams.bsky.social UI in #ConfluentCloud.

We are now showing more detailed information about instances, threads, running/rebalancing state, and JMX metrics.

Check it out and let us know what you think!

www.confluent.io/blog/monitor...

Monitor Kafka Streams Health in Confluent Cloud

Quickly troubleshoot Kafka Streams apps with new health metrics in Confluent Cloud. Spot bottlenecks, monitor RocksDB, and reduce MTTR—no extra code.

www.confluent.io

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Matthias J. Sax @mjsax.bsky.social · 3d

Which one did you go for? Not an easy pick…

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Matthias J. Sax @mjsax.bsky.social · 9d

Oh dear…

bsky.app/profile/kafk...

Kafka Streams @kafkastreams.bsky.social · 9d

🚨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.

issues.apache.org

Reposted by Matthias J. Sax

Mickael Maison @mickaelmaison.bsky.social · 15d

I've just published the 92nd edition of my Kafka Monthly Digest! It covers the 4.1.0 release, as well as progress on 4.0.1 and 4.2.0. I also covers new KIPs, recent community releases and blog posts.

developers.redhat.com/blog/2025/10...

Kafka Monthly Digest: September 2025 | Red Hat Developer

This edition of the Kafka Monthly Digest covers the new Apache Kafka 4.1.0 release as well as the releases in progress: 4.0.1 and 4.2.0. It also looks at the new KIPs, community project releases and

developers.redhat.com

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Reposted by Matthias J. Sax

Kafka Streams @kafkastreams.bsky.social · 16d

Any KIP-1071 experience out there?

Asking for a friend.

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Matthias J. Sax @mjsax.bsky.social · 15d

issues.apache.org/jira/browse/...

[KAFKA-19748] Memory leak using range scans - ASF JIRA

issues.apache.org

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Matthias J. Sax @mjsax.bsky.social · 16d

I hate it when @kafkastreams.bsky.social ships with a memory leak. I hate it even more, if I am the offender…

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Matthias J. Sax @mjsax.bsky.social · 24d

Don’t know. I use Deco X95 and I don’t have any complaints.

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Reposted by Matthias J. Sax

Apache Software Foundation (The ASF) @apache.org · Sep 11

🚨 Breaking News from Community Over Code 🚨

Introducing The ASF’s New Logo buff.ly/DzgT82w

#CommunityOverCode #opensource

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Matthias J. Sax @mjsax.bsky.social · Sep 10

The #ApacheKafka Java clients and #KafkaStreams engineering team at @confluent.io keeps growing.

Very excited to welcome @okaberintaroubeta.bsky.social, Genseric Ghiro, and @nikitashupletsov.bsky.social!

We also have one more entry level position in Toronto 🇨🇦

careers.confluent.io/jobs/job/67c...

careers.confluent.io

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Reposted by Matthias J. Sax

Confluent @confluent.io · Sep 8

Got a data monster slowing your business down?

Move from batch to real-time with The World’s Data Streaming Platform. Get the right data. Right where you need it. Right now.

Learn how to put your data monster to work ➡️ www.youtube.com/watch?v=HWAD...

Confluent | Put Your Data Monster to Work for You

YouTube video by Confluent

www.youtube.com

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Matthias J. Sax @mjsax.bsky.social · Sep 8

It’s not over, until it’s over. #goBills

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Reposted by Matthias J. Sax

Confluent @confluent.io · Sep 5

@tlberglund.bsky.social‬ is back on the mic! And teaming up with co-hosts ‪@adipolak.bsky.social and ‬@gamussa.dev‬ for conversations with devs who’ve solved really interesting challenges in their careers.
Coming your way September 22 on YouTube ➡️ https://cnfl.io/4mP2bVj

We're back! Confluent Developer Podcast ft. Tim Berglund, Adi Polak & Viktor Gamov

Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube.

cnfl.io

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Matthias J. Sax @mjsax.bsky.social · Sep 4

This is huge for Kafka Streams! Becoming part of the Kafka protocol is quite a milestone!

Kafka Streams @kafkastreams.bsky.social · Sep 4

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

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Reposted by Matthias J. Sax

Confluent @confluent.io · Sep 4

Something’s lurking in your data…
👀 September 8.

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Matthias J. Sax @mjsax.bsky.social · Aug 23

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Matthias J. Sax @mjsax.bsky.social · Aug 15

"Congratulations!

Your talk, The Curious Case of Streaming Windows, has been accepted for Current 2025 taking place in-person October 29-30th, 2025 in New Orleans, Louisiana."

Looking forward to this! #Current2025 #ApacheKafka #KafkaStreams

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Reposted by Matthias J. Sax

Confluent @confluent.io · Aug 8

Know someone who’s always answering questions, sharing code, mentoring, or pushing Apache Kafka® and Apache Flink® forward?
That sounds like a Confluent Community Catalyst to us.
Nominate them or yourself by September 1 →
cnfl.io/45pZGRO

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Matthias J. Sax @mjsax.bsky.social · Jul 30

Without the test case, we would not have made progress such quickly. Community collaboration at its best!

issues.apache.org/jira/browse/...

[KAFKA-19479] at_least_once mode in Kafka Streams silently drops messages when the producer fails with MESSAGE_TOO_LARGE, violating delivery guarantees - ASF JIRA

issues.apache.org

Matthias J. Sax @mjsax.bsky.social · Jul 30

(Step 2) Another person sees the ticket and writes a test case that can reproduce the issue reliably.

(Step 3) Use the test to step through the code and identify a bug inside KafkaProducer.

(Step 4 -- TODO) Figure out how to fix it.

\2

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Matthias J. Sax @mjsax.bsky.social · Jul 30

I loving working with the #ApacheKafka community!

(Step 1) A person asks a question on Confluent Community Slack, and it sounds like a serious issue, so we ask them to file a Jira ticket.

\1

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Reposted by Matthias J. Sax

Kafka Streams @kafkastreams.bsky.social · Jul 28

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!

https://cwiki.apache.org/confluence/dis…

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Reposted by Matthias J. Sax

Gunnar Morling @gunnarmorling.dev · Jul 10

Praise in public, criticize in private.

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Matthias J. Sax @mjsax.bsky.social · Jun 28

Does AI really make you more productive?

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