Matthias J. Sax 🦦

Matthias J. Sax 🦦

@mjsax.bsky.social

American Homeowner 🇺🇸 | Battle Born | Go Bills 🦬 | Software Engineer at Confluent | GM of KafkaStreams 🦦 | ASF Member, Committer and PMC member (Apache Kafka, Apache Flink, Apache Storm) — Reno. Home Means Nevada.

1.3K followers123 following207 posts

Matthias J. Sax 🦦
@mjsax.bsky.social

Woot, woot! 🎉 "Current San Francisco 2026: Your session has been accepted!" Excited to share the stage with Lucas Brutschy to talk about "Keeping the Balance with Kafka Streams" (KIP-1071), ie, how we are going to support warmup tasks and are building high-availability features.

Matthias J. Sax 🦦
@mjsax.bsky.social

“Separate GoFundMe crowdfunding campaigns were set up to assist Arrate and the Kieffer family.“

PBS News@pbsnews.org

A fast-growing wildfire destroying homes in northwest Reno, Nevada, on Sunday was human-caused and uncontained, authorities said, as they encouraged some 90,000 people to evacuate. https://to.pbs.org/4czi8Mg

to.pbs.orgHuman-caused wildfire approaches Reno, Nevada, forcing thousands of evacuationsThe Hawk Fire began Saturday and quickly grew to 20 square miles as it spread across the Peavine Peak area of the Humboldt–Toiyabe National Forest, where rugged foothills are ringed by homes and busin...

Matthias J. Sax 🦦 reposted

Kafka Streams
@kafkastreams.bsky.social

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/...

downloads.apache.orgdownloads.apache.orgBelow is a summary of the JIRA issues addressed in the 4.3.1 release of Kafka. For full documentation of the release, a guide to get started, and information about the project, see the Kafka project site.
Matthias J. Sax 🦦
@mjsax.bsky.social

I state corrected… the deadline was just extended today to June/28.

Matthias J. Sax 🦦@mjsax.bsky.social

The CfP for #Current2026 in San Francisco is closing soon (June/8, 8:59pm PDT). Time to submit your proposal now! current.confluent.io/san-francisco

current.confluent.ioSan FranciscoCurrent is the biggest event in data streaming. Over two days in San Francisco, developers, data practitioners, and tech executives will come together to shape the future of Apache Kafka, Apache Flink...

Matthias J. Sax 🦦 reposted

Kafka Streams
@kafkastreams.bsky.social

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/...

downloads.apache.orgdownloads.apache.orgBelow is a summary of the JIRA issues addressed in the 4.2.1 release of Kafka. For full documentation of the release, a guide to get started, and information about the project, see the Kafka project site.
Matthias J. Sax 🦦
@mjsax.bsky.social

💯

Mickael Maison@mickaelmaison.bsky.social

I've just published the 100th edition of my Kafka Monthly Digest! It covers the 4.3.0 and 4.2.1 releases as well as recent KIPs, community project releases and blog posts. developers.redhat.com/blog/2026/06...

developers.redhat.comKafka Monthly Digest: May 2026 | Red Hat DeveloperThis is the 100th edition of the Kafka Monthly Digest! It covers the new releases: 4.3.0 and 4.2.1. It also looks at the new KIPs, community project releases, and blog posts from May 2026

Matthias J. Sax 🦦 reposted

Tom Cooper
@tomcooper.dev

Continuing the rebalancing theme at #Current26, with a talk on the challenges of large rebalances in Kafka Streams and moving to KIP-1071 based rebalances

Matthias J. Sax 🦦 reposted

Tom Cooper
@tomcooper.dev

Another Kafka Streams talk at #Current26, this time from Michelin around KS automatic resource naming and all the "fun" that comes from that

Matthias J. Sax 🦦 reposted

Tom Cooper
@tomcooper.dev

Last breakout session of #Current26 is sticking with my Kafka Streams theme, a walkthrough of designing a production grade application based on Kafka Streams

Matthias J. Sax 🦦 reposted

Mickael Maison
@mickaelmaison.bsky.social

10 years ago, I was opening his first PR to Apache Kafka github.com/apache/kafka... I clearly had no idea what I was getting myself into!

github.comKAFKA-3587: LogCleaner fails due to incorrect offset map computation … by mimaison · Pull Request #1332 · apache/kafkaRemoved the over pessimistic require and instead attempt to fill the dedup buffer. Use the (only) map until full; this may allow to process all dirty segment (optimism) or may happen in the middle ...
Matthias J. Sax 🦦
@mjsax.bsky.social

You are coming to #Current London in May? We are having an #ApacheKafka AMA at the meetup hub on Tuesday with some committers and PMC members. Stop by to ask your questions or just listen in. /1

Matthias J. Sax 🦦
@mjsax.bsky.social

Later on Tuesday, we also doing some #ApacheKafka office hours at the expo hall, with folks from Confluent. Just a casual get together to talk all things Kafka. Hope to see you there!

Matthias J. Sax 🦦
@mjsax.bsky.social

It‘s always fun to listen to early war stories about #Kafka and #KafkaStreams. Check out the lastest Confluent Developer podcast with Mateo Rojas. podcasts.apple.com/us/podcast/c...

podcasts.apple.comConfluent Developer ft. Tim Berglund, Adi Polak & Viktor GamovTechnology Podcast · Updated Weekly · Hi, we’re Tim Berglund, Adi Polak, and Viktor Gamov and we’re excited to bring you the Confluent Developer podcast (formerly “Streaming Audio.”) Our hand-crafted ...
Matthias J. Sax 🦦
@mjsax.bsky.social

With the recent #ApacheKafka 4.2 release, the new "streams" rebalance protocol is production ready. It's exciting that it's also GA on Confluent Cloud now. The cherry-on-top is, that our #KafkaStreams Cloud UI now also shows task assignment information for "streams" groups. \1

Matthias J. Sax 🦦 reposted

Kafka Streams
@kafkastreams.bsky.social

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

Matthias J. Sax 🦦 reposted

Kafka Streams
@kafkastreams.bsky.social

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...

kafka.apache.orgApache Kafka 4.2.0 Release AnnouncementWe are proud to announce the release of Apache Kafka® 4.2. This release contains many new features and improvements. This blog post will highlight some of the more prominent ones. For a full list of c...

Matthias J. Sax 🦦 reposted

Kafka Streams
@kafkastreams.bsky.social

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.

Matthias J. Sax 🦦
@mjsax.bsky.social

I had the pleasure to get an „early access“, and have to say, it’s a great book! #KafkaStreams

Yennick Trevels@digitalbuff.dev

🚀 Launch week is almost here! The #KafkaStreams Field Guide drops next Tue, Dec 16 — and early buyers get 15% off during launch week with code LAUNCHWEEK (auto-applied at checkout). I’m also using purchasing power parity so you get a fair regional price. kafkastreamsfieldguide.com

kafkastreamsfieldguide.comKafka Streams Field Guide | Kafka Streams Field Guide BookField guide with 8 essential insights for running Kafka Streams in production

Matthias J. Sax 🦦 reposted

Apache Software Foundation (The ASF)
@apache.org

Big news for open source in Taiwan! ALC Taipei has officially launched with The ASF's support and is already contributing across Kafka, Airflow, YuniKorn, Ozone and more. Read the full story → buff.ly/RSPuecn #CommunityOverCode #OpenSource

news.apache.orgALC Taipei: Igniting the Apache Open Source Movement in Taiwan - The ASF BlogBy: Chia-Ping Tsai (ALC Taipei Chief) We are absolutely thrilled to announce the official launch of the Apache Local Community (ALC) Taipei, established with the full support of The ASF! ALC Taipei…
Matthias J. Sax 🦦
@mjsax.bsky.social

Sounds like fun!

Andy Pavlo@andypavlo.bsky.social

Do you like databases? Do you want to hear two database professors rant about them? Do you need one of those professors to have a Turing Award for databases? If yes, then join Mike Stonebraker and I next Wed Dec 10 @ 1:00pm EST for database hot takes: www.dbos.dev/webcast-2025...

dbos.dev2025 in Review with Mike Stonebraker and Andy PavloWebcast Dec 10: DBMS researchers Mike Stonebraker (MIT / DBOS) and Andy Pavlo (CMU) discuss which data and CS trends are heating up or cooling down heading into 2026.