Hello again Kafka users, developers and client-developers, This is the third candidate for release of Apache Kafka 3.0.0. It is a major release that includes many new features, including:
* The deprecation of support for Java 8 and Scala 2.12. * Kafka Raft support for snapshots of the metadata topic and other improvements in the self-managed quorum. * Deprecation of message formats v0 and v1. * Stronger delivery guarantees for the Kafka producer enabled by default. * Optimizations in OffsetFetch and FindCoordinator requests. * More flexible Mirror Maker 2 configuration and deprecation of Mirror Maker 1. * Ability to restart a connector's tasks on a single call in Kafka Connect. * Connector log contexts and connector client overrides are now enabled by default. * Enhanced semantics for timestamp synchronization in Kafka Streams. * Revamped public API for Stream's TaskId. * Default serde becomes null in Kafka Streams and several other configuration changes. You may read and review a more detailed list of changes in the 3.0.0 blog post draft here: https://blogs.apache.org/preview/kafka/?previewEntry=what-s-new-in-apache6 Release notes for the 3.0.0 release: https://home.apache.org/~kkarantasis/kafka-3.0.0-rc2/RELEASE_NOTES.html *** Please download, test and vote by Tuesday, September 14, 2021 *** 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://home.apache.org/~kkarantasis/kafka-3.0.0-rc2/ * Maven artifacts to be voted upon: https://repository.apache.org/content/groups/staging/org/apache/kafka/ * Javadoc: https://home.apache.org/~kkarantasis/kafka-3.0.0-rc2/javadoc/ * Tag to be voted upon (off 3.0 branch) is the 3.0.0 tag: https://github.com/apache/kafka/releases/tag/3.0.0-rc2 * Documentation: https://kafka.apache.org/30/documentation.html * Protocol: https://kafka.apache.org/30/protocol.html * Successful Jenkins builds for the 3.0 branch: Unit/integration tests: https://ci-builds.apache.org/blue/organizations/jenkins/Kafka%2Fkafka/detail/3.0/129/ (1 flaky test failure) System tests: https://jenkins.confluent.io/job/system-test-kafka/job/3.0/67/ (1 flaky test failure) /************************************** Thanks, Konstantine
