Hi Konstantine, Some findings from running 3.0.0-RC1 with the librdkafka test suite:
* Compaction seems to take slightly longer to kick in when segment sizes exceed their threshold. (Used to take less than 20 seconds, now takes 20..30 seconds.) * CreateTopic seems to take slightly longer to propagate through the cluster, e.g., before a new topic is available in metadata from other brokers. * CreateTopics seems to take longer when the Admin request timeout is set, looks like a plateau at 10 seconds: https://imgur.com/a/n6y76sj (This is a 3 broker cluster with identical configs between 2.8 and 3.0.0.) Nothing critical, but could be an indication of regression so I thought I'd mention it. Regards, Magnus Den tis 31 aug. 2021 kl 17:51 skrev Konstantine Karantasis < kkaranta...@apache.org>: > Small correction to my previous email. > The actual link for public preview of the 3.0.0 blog post draft is: > > https://blogs.apache.org/preview/kafka/?previewEntry=what-s-new-in-apache6 > > (see also the email thread with title: [DISCUSS] Please review the 3.0.0 > blog post) > > Best, > Konstantine > > On Tue, Aug 31, 2021 at 6:34 PM Konstantine Karantasis < > kkaranta...@apache.org> wrote: > > > > > 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 > > >
