This 103rd edition of the Kafka Monthly Digest covers what happened in the Apache Kafka community in August 2026.
For last month’s digest, see Kafka Monthly Digest: July 2026.
Releases
There is one release in progress:
4.4.0
The 4.4 branch was cut on August 11, followed by code freeze on August 13. On August, 21 Omnia Ibrahim published the first release candidate, RC0. Since then a few blocker issues have been found (KAFKA-20982, KAFKA-20970, KAFKA-20979). The next release candidate should be available in early September. You can find the release plan in the wiki.
Kafka Improvement Proposals
Last month, the community submitted 3 KIPs (KIP-1370 to KIP-1372). I'll highlight a few of them:
KIP-1370: Include Instance and Rack IDs in kafka-streams-groups.sh Member Output: This KIP proposes updating the
kafka-streams-groups.shtool to optionally include the instance and rack IDs when describing a Streams group. These IDs are helpful when investigating issues with applications and are already present in theStreamsGroupDescribeprotocol.
KIP-1372: Reject topic configurations where min.insync.replicas exceeds the replication factor: Kafka currently allows setting a higher value for
min.insync.replicasthanreplication.factor. Since Kafka 4.0.0 (KIP-966), this scenario is mitigated by using the smallest value of these two configurations for the effectivemin.insync.replicas. This KIP aims at enforcing coherent values for these configurations and rejecting invalid values when a topic is created or configurations are updated.
Community Releases
I selected releases of some open source community projects:
strimzi-kafka-operator 1.2.0: Strimzi is a Kubernetes Operator for running Kafka. This release adds support for Kafka 4.3.1, allows creating connectors directly in the STOPPED state, and uses the new cordon feature from Kafka 4.3.0 when scaling down brokers.
Blogs
I selected some interesting blog articles that were published last month:
- How to configure Kafka Authentication in Strimzi
- Deploying Apache Kafka® Streams next to your data
- Kafka Simulator v1.3 — durability and replication
To learn more about Kafka, visit Red Hat Developer's Apache Kafka topic page.
