This is the fourth candidate for the release of Apache Kafka 3.9.0. I have titled it rc4 since I had an rc1 which got very far, even to the point of pushing tags and docker images, before I spotted an issue. So rather than mutate the tags, I decided to skip over rc1.
- This is a major release, the final one in the 3.x line. (There may of course be other minor releases in this line, such as 3.9.1.) - Tiered storage will be considered production-ready in this release. - This will be the final major release to feature the deprecated ZooKeeper mode. This release includes the following KIPs: - KIP-853: Support dynamically changing KRaft controller membership - KIP-1057: Add remote log metadata flag to the dump log tool - KIP-1049: Add config log.summary.interval.ms to Kafka Streams - KIP-1040: Improve handling of nullable values in InsertField, ExtractField, and other transformations - KIP-1031: Control offset translation in MirrorSourceConnector - KIP-1033: Add Kafka Streams exception handler for exceptions occurring during processing - KIP-1017: Health check endpoint for Kafka Connect - KIP-1025: Optionally URL-encode clientID and clientSecret in authorization header - KIP-1005: Expose EarliestLocalOffset and TieredOffset - KIP-950: Tiered Storage Disablement - KIP-956: Tiered Storage Quotas Release notes for the 3.9.0 release: https://dist.apache.org/repos/dist/dev/kafka/3.9.0-rc4/RELEASE_NOTES.html *** Please download, test and vote by October 30, 2024. Kafka's KEYS file containing PGP keys we use to sign the release: https://kafka.apache.org/KEYS * Release artifacts to be voted upon (source and binary): https://dist.apache.org/repos/dist/dev/kafka/3.9.0-rc4/ * Docker release artifacts to be voted upon: apache/kafka:3.9.0-rc4 apache/kafka-native:3.9.0-rc4 * Maven artifacts to be voted upon: https://repository.apache.org/content/groups/staging/org/apache/kafka/ * Javadoc: https://dist.apache.org/repos/dist/dev/kafka/3.9.0-rc4/javadoc/ * Documentation: https://kafka.apache.org/39/documentation.html * Protocol: https://kafka.apache.org/39/protocol.html * Tag to be voted upon (off 3.9 branch) is the 3.9.0-rc4 tag: https://github.com/apache/kafka/releases/tag/3.9.0-rc4 * Successful Docker Image Github Actions Pipeline for 3.9 branch: Docker Build Test Pipeline (JVM): https://github.com/apache/kafka/actions/runs/11526599472 Docker Build Test Pipeline (Native): https://github.com/apache/kafka/actions/runs/11526859627 Thanks to everyone who helped with this release candidate, either by contributing code, testing, or documentation. Regards, Colin
