What’s New in Spring Boot 3.0.4? Bug Fixes, Docs, and Dependency Upgrades

Spring Boot 3.0.4 has been released earlier than planned because Spring Framework 6.0.5 introduced an issue where PathMatchingResourcePatternResolver can no longer handle paths containing spaces or special characters, causing beans and controllers to fail scanning. This release includes 19 bug fixes, documentation improvements, and dependency upgrades.

“Project directory with Chinese characters and spaces – a big no‑no! Pay attention!”

🐞 Bug Fixes

Maven plugin now uses local timezone timestamps when outputting timestamps (#34430).

Correct logger class used by

org.springframework.boot.web.embedded.jetty.GracefulShutdown

(#34419).

@ConfigurationProperties

no longer binds record property values during initialization (#34407).

Custom ConfigDataLocationResolver/ConfigDataLoader works with spring-boot-devtools in 3.0.x (#34372).

defaultTracingObservationHandler now follows documentation ordering (#34216).

Spring Boot 3 does not provide configuration for custom red metrics tag keys (#34194).

📔 Documentation

Documentation support for Gradle 8 (#34462).

Batch update processing documentation (#34437).

Add Failover starter connection documentation (#34422).

Fix spelling error in external-config.adoc (#34414).

General spelling fixes (#34398).

Consistent use of plugin DSL in Spring Boot Gradle plugin docs (#34391).

🔨 Dependency Upgrades

Upgrade to Couchbase Client 3.4.3 (#34445).

Upgrade to Dropwizard Metrics 4.2.17 (#34446).

Upgrade to Jetty 11.0.14 (#34447).

Upgrade to Reactor Bom 2022.0.4 (#34444).

Upgrade to Spring Data Bom 2022.0.3 (#34439).

Upgrade to Spring Framework 6.0.6 (#34440).

Upgrade to Spring Kafka 3.0.4 (#34441).