Hello Kafka users, developers and client-developers,
This is the second release candidate for Apache Kafka 3.0.0.
It corresponds to 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/roller-ui/authoring/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-rc1/RELEASE_NOTES.html
*** Please download, test and vote by Wednesday, September 8, 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-rc1/
* 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-rc1/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-rc1
* 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/3.0/121/pipeline/
(only few flaky failures)
System tests: https://jenkins.confluent.io/job/system-test-kafka/job/3.0/57/
/**************************************
Thanks,
Konstantine
This is the second release candidate for Apache Kafka 3.0.0.
It corresponds to 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/roller-ui/authoring/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-rc1/RELEASE_NOTES.html
*** Please download, test and vote by Wednesday, September 8, 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-rc1/
* 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-rc1/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-rc1
* 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/3.0/121/pipeline/
(only few flaky failures)
System tests: https://jenkins.confluent.io/job/system-test-kafka/job/3.0/57/
/**************************************
Thanks,
Konstantine
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