Technology
Spring ecosystem releases first RCs for 18 projects in coordinated October push
Spring Boot, Framework, Data, Cloud, Security and a dozen other projects all shipped release candidate versions the week of October 19, with performance gains, security improvements, and API modernizations across the board.
InfoQ
Spring's development ecosystem entered an active release phase during mid-October 2026, with a synchronized push bringing release candidates to 18 projects spanning the full breadth of the platform—from core frameworks to AI, security, messaging, and cloud infrastructure.
Major Version Jumps and Performance Improvements#
Spring Boot 4.2.0-RC1 introduced several notable updates: the platform now adopts Ubuntu Resolute as its builder base, replacing Noble Java Tiny Builder, and delivers enhanced performance for Uber-JAR execution through direct class and resource lookups in nested archives. Spring Framework 7.1.0-RC1 refined null-safety annotations, added new retry listener hooks for better state tracking, and deprecated some legacy APIs.
On the distributed systems front, Spring Cloud 2026.0.0-RC1 (codenamed Paddington) consolidated Spring Cloud Bus as a module within Spring Cloud Stream rather than a standalone project, reducing architectural complexity. The release maintains compatibility with Spring Boot 4.2.0-RC1.
Data, Security, and Message Processing#
Spring Data 2026.1.0-RC1 extended Redis support with subscription notifications tied to annotated listener methods through the SubscriptionListener interface. Spring Security 7.2.0-RC1 normalized HTTP method casing to prevent detection of non-canonical values as distinct, and standardized content-type headers across OAuth2 token introspection classes.
Message-driven applications gained refinements: Spring AMQP 4.2.0-RC1 removed constraints on null arrays in queue and exchange declarations, while Spring for Apache Kafka 4.2.0-RC1 added delivery attempt tracking via header values when using the CommonDelegatingErrorHandler.
Modularity, GraphQL, and AI Capabilities#
Spring Modulith 2.2.0-RC1 introduced new event publication states (ABANDONED and RESUBMITTED) and shifted event completion to occur within listener transaction boundaries, eliminating race conditions. Spring for GraphQL 2.1.0-RC1 restored the Content-Length response header for WebFlux compatibility and upgraded dependencies across the board.
