• Upgrading from Spring Boot 2.3
• Versioning scheme change
• JUnit 5’s Vintage Engine Removed from spring-boot-starter-test
• Config File Processing (application properties and YAML files)
• Config Data Imports
• Embedded database detection
• User-defined MongoClientSettings no longer customized
• Logback Configuration Properties
• Default Servlet Registration
• HTTP traces no longer include cookie headers by default
• Undertow Path on Forward
• Neo4j
• Hazelcast 4
• Elasticsearch RestClient
• R2DBC
• Flyway
• Removal of Plugin Management for Flatten Maven Plugin
• Version management for exec-maven-plugin
• Spring Boot Gradle Plugin
• Metrics export in integration tests
• Deprecations from Spring Boot 2.2 and 2.3
• New and Noteworthy
• Spring Framework 5.3
• Spring Data 2020.0
• Neo4j
• R2DBC
• Java 15 Support
• Custom property name support
• Layered jar enabled by default
• Importing Additional Application Config
• Volume Mounted Config Directory Trees
• Importing Config Files That Have no File Extension
• Origin Chains
• Startup Endpoint
• Docker/Buildpack Support
• Publishing Images
• Authentication
• Paketo Buildpack Defaults
• Maven Buildpack Support
• Gradle Buildpack Support
• Redis Cache Metrics
• Web Configuration Properties
• Register @WebListeners in a way that allows them to register servlets and filters
• Slice Test for Cassandra
• Flyway 7
• Configuration property for H2 Console’s web admin password
• CqlSession-Based Health Indicators for Apache Cassandra
• Filtered Scraping with Prometheus
• Spring Security SAML Configuration Properties
• Failure Analyzers
• Jar Optimizations
• Miscellaneous
• Dependency Upgrades
• Deprecations in Spring Boot 2.4