What’s New in Spring Boot 2.3.0? Key Features and Upgrades Explained

Dependency Upgrades

New core component versions include:

Spring Data Neumann

Spring HATEOAS 1.1

Spring Integration 5.3

Spring Kafka 2.5

Spring Security 5.3

Spring Session Dragonfruit

Third‑Party Dependencies

Cassandra Driver 4.6

Couchbase Client 3.0

Elasticsearch 7.6

Kafka 2.5

Micrometer 1.5

MongoDB 4.0

Java 14 Support

Spring Boot 2.3.0 runs on Java 14 while remaining compatible with Java 11 and Java 8.

Docker Container Support

The release adds features to build Docker images directly, including support for Cloud Native Buildpacks, Maven and Gradle plugins for building images, and layered JARs for optimized packaging.

Graceful Shutdown

All embedded web servers (Jetty, Reactor Netty, Tomcat, Undertow) and both reactive and servlet‑based applications now support graceful shutdown with configurable shutdown timeout.

Service Availability Probes

Spring Boot 2.3.0 includes built‑in liveness and readiness probes to indicate whether the application is ready to handle requests.

Other Changes

For full release notes see the Spring Boot 2.3 release notes. The release also lists deprecated classes and methods removed in the next version. Over 680 contributors have contributed more than 26,000 commits.