Upgrading to JDK 17

This page describes the experience of the Spring Data team while upgrading the project build from a JDK 8 to JDK 17 baseline.

Related issues

• Main issue (Upgrade to Java 17)
• Drop RxJava 1 and 2 support
• Migrate to Jakarta EE 9

Easy to miss

• Jakarta EE 9 Migration: javax.enterprise.inject.spi.Extension service loader metadata must be renamed to jakarta.enterprise.inject.spi.Extension.

Learnings

• Several dependencies (EJB API, Transaction API, Interceptor API) could be safely removed without breaking anything.
• Newer javadoc requires presence of compiled code (https://github.com/spring-projects/spring-data-build/issues/1546) otherwise it fails with not found errors.