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Spring News Roundup: First Release Candidates of Boot, Framework, Data, Security, Modulith, AI

The first release candidate of Spring Boot 4.2.0 delivers bug fixes, documentation improvements, dependency upgrades and new features such as: a migration to the Ubuntu Resolute builder replacing the Noble Java Tiny Builder; and improved Uber-Jar performance using direct lookup of classes and resources in nested jars.

Spring News Roundup: First Release Candidates of Boot, Framework, Data, Security, Modulith, AI

More details on this release may be found in the release notes and this wiki page. Further details on this release, including removal of deprecated APIs, may be found in the release notes.

The first release candidate of Spring Data 2026.1.0 provides bug fixes, dependency upgrades, RC1 upgrades to all of the subprojects and a notable new feature in Spring Data Redis that now forwards subscription notifications related to annotated listener methods if a bean implements the SubscriptionListener interface. The first release candidate of Spring Cloud 2026.0.0, codenamed Paddington, delivers dependency upgrades, RC1 upgrades to all of the subprojects and a notable change where Spring Cloud Bus is no longer its own project and has been incorporated into Spring Cloud Stream. This release is based on Spring Boot 4.2.0-RC1.

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