• Upgrading from Spring Boot 2.2
• Changes to minimum requirements
• Validation Starter no longer included in web starters
• Unique DataSource Name By Default
• Spring Data Neumann
• Cassandra
• Couchbase
• Elasticsearch
• MongoDB
• Neo4j
• JDBC
• Micrometer
• Jackson
• Spring Cloud Connectors starter has been removed
• Embedded Servlet web server threading configuration
• Changes to the Default Error Page’s Content
• Disk space health indicator
• Automatic creation of developmentOnly Gradle configuration
• Removal of Maven Site Plugin management
• Removal of Maven Exec Plugin custom configuration
• ApplicationContextRunner disables bean overriding by default
• Activating multiple profiles with @ActiveProfiles
• WebServerInitializedEvent and ContextRefreshedEvent
• Adding Directories to the Classpath with Maven
• Deprecations from Spring Boot 2.2
• Configuration properties
• New and Noteworthy
• Java 14 support
• Build OCI images with Cloud Native Buildpacks
• Build layered jars for inclusion in a Docker image
• Predictable Classpath Ordering When Exploding Fat Jars
• Support of wildcard locations for configuration files
• Graceful shutdown
• Liveness and Readiness probes
• Spring Data Neumann
• R2DBC support
• Configurable base path for WebFlux applications
• Date-Time conversion in web applications
• Actuator Improvements
• End-to-end Traceability for Configuration Properties
• Names in metrics endpoint are ordered alphabetically
• Query-less datasource health indicator
• Contributing additional tags to Web MVC and WebFlux metrics
• Auto-configuration of Wavefront’s Sender
• Native Kafka metrics
• RSocket support for Spring Integration
• Binding to Period
• Slice test for Web Services
• Dependency Upgrades
• Miscellaneous
• Deprecations in Spring Boot 2.3