Hi Chris, Thank you so much for opening this KIP, and making sure Kafka keeps up with the rest of the Java ecosystem!
I took a look around at some Open Source connector implementations, and checked their Java version support: * The Aiven connect plugins (http, bigquery, jdbc, elasticsearch, opensearch, commons, s3, transforms, gcs), 6/9 are tested with JDK 17 in CI, 2/9 JDK 11, and 1/9 JDK 8. I'll look into improving the testing matrix, but I don't expect substantial problems with requiring JDK 17. * The Debezium Project lists Java 11+ compatibility: https://debezium.io/releases/ and appears to use Java 22 (ga) and 23 (ea) in their CI: https://github.com/debezium/debezium/blob/9cdaa38453c9f065c6075d31636592a5b147518f/.github/workflows/jdk-outreach-workflow.yml#L20 I think the bigger problem really is the ConnectRestExtension, since we've baked the rs-api type into the signature of ConnectRestExtensionContext. * Aiven doesn't have any ConnectRestExtensions, so this isn't a concern for us. * The Debezium Project has at least 6 ConnectRestExtension implementations: https://github.com/search?q=repo%3Adebezium%2Fdebezium+ConnectRestExtension+language%3AJava&type=code&l=Java . Some of these are baked into artifacts that I know for a fact are used in normal connect deployments. * I found a healthcheck extension that looks unmaintained: https://github.com/LoObp4ck/kafka-connect-healthchecks/blob/2d9dbfee900d9f85e6acd9a09bd04969afa46261/src/main/java/com/loobpack/data/kafka/connect/healthcheck/extension/HealthCheckConnectRestExtension.java#L9 I figure that adopting this KIP would mean that the Debezium project would be forced to bump their major version 3.0 to be compatible with Connect 4.0, or otherwise change their packaging, so I'd like to hear from the Debezium folks what they think of this proposal. Thanks, Greg On Wed, Mar 27, 2024 at 4:43 PM Christopher Shannon <christopher.l.shan...@gmail.com> wrote: > > Hi, > > I'm proposing a KIP for Kafka 4.0 to upgrade to to Jakarta and JavaEE 9 > APIs. This will also upgrade dependencies like Jetty and move away from > the depcrated javax namespace to be in line with other libraries and > frameworks. There was some initial > <https://lists.apache.org/thread/p4qbqh8r77h4khn3yoof2b0gbq3wbc5q> > discussion and below is the KIP. > > Please take a look and let me know what you think: > > https://cwiki.apache.org/confluence/display/KAFKA/KIP-1032%3A+Upgrade+to+Jakarta+and+JavaEE+9+in+Kafka+4.0 > > Thanks, > Chris
