Hi, All. Java 21 will be released in a month and Apache Spark master branch (4.0.0-SNAPSHOT) achieved the first milestone (SPARK-43831: Build and Run Spark on Java 21) Today.
1. JDK 21: https://openjdk.org/projects/jdk/21/ - 2023/08/24 Final Release Candidate - 2023/09/19 General Availability 2. `master` branch CIs We have a healthy SBT-based Daily Java 21 Test Coverage (Java/Scala/R/Python). Also, the main CI (PR and commit) job has Java 21 Maven Build Test Coverage in addition to Java 11 and 17 ones. - Daily CI: https://github.com/apache/spark/actions/workflows/build_java21.yml - Main CI: https://github.com/apache/spark/actions/workflows/build_main.yml?query=branch%3Amaster You can play with Spark on Java 21. Please let us know if you have any issues. Thanks, Dongjoon.
