What to Expect in Spring Boot 4.1: Key Features and Improvements in 2026

What to Expect in Spring Boot 4.1?

Spring Boot 4.1 is the next minor release after Spring Boot 4.0. It continues to refine the foundation laid in 4.0 with improvements in observability, messaging, testing, and integrations such as gRPC and MongoDB for Spring Batch.

The release brings practical enhancements that make development and operations smoother for cloud-native Java applications.

Will Spring Boot 4.1 bring major breaking changes?

No. Spring Boot 4.1 is a minor release focused on enhancements, bug fixes, and dependency upgrades rather than breaking changes. Most applications running on Spring Boot 4.0 should upgrade smoothly.

The team continues to build on the modular architecture and modern Java baseline introduced in 4.0.

What are the key new features in Spring Boot 4.1?

Spring Boot 4.1 introduces several useful improvements across different areas:

• Better support for observation and metric conventions
• Improved OpenTelemetry integration
• Support for AMQP 1.0 with auto-configuration
• New Spring Batch MongoDB auto-configuration module
• Support for Spring gRPC
• Enhanced testing with @AutoConfigureWebServer
• Log4j file rotation improvements
• SSL support for RabbitMQ streams

How does Spring Boot 4.1 improve observability?

Observability receives continued attention in 4.1. The release refines metric conventions and makes it easier to align with OpenTelemetry standards out of the box.

These changes help teams monitor distributed systems more effectively with less manual configuration, especially in Kubernetes and cloud environments.

What messaging and integration improvements are coming?

Spring Boot 4.1 adds official support for AMQP 1.0, including auto-configuration for AmqpConnectionFactory and AmqpClient.

It also brings better integration for Spring Batch with MongoDB through a dedicated starter module spring-boot-batch-data-mongo. Additionally, you will find enhanced SSL support for RabbitMQ streams.

// Example: Using the new Spring Batch MongoDB support
spring:
  batch:
    job:
      enabled: true

Will testing become easier in Spring Boot 4.1?

Yes. A new annotation @AutoConfigureWebServer simplifies sliced tests that require a real web server. This is especially useful for integration and end-to-end testing scenarios.

The release also reinstates full support for Spock testing framework with Groovy 5 compatibility.

Key Changes Expected in Spring Boot 4.1

How should you prepare for Spring Boot 4.1?

Start by upgrading to the latest Spring Boot 4.0 patch version and experiment with the current milestones (4.1.0-M4). Review your observability setup and test any messaging or batch jobs that could benefit from the new integrations.

Because this is a minor release, the upgrade path is expected to be straightforward for most teams.

Frequently Asked Questions

When will Spring Boot 4.1 be released?

The general availability is planned for May 2026. Milestone 4 is already available for early testing.

Is Spring Boot 4.1 a good time to upgrade from 3.x?

If you are still on 3.x, consider moving to 4.0 first. Spring Boot 4.1 builds on the foundation of 4.0 (Java 17+ baseline, modular auto-configuration, HTTP service clients, etc.).

Does Spring Boot 4.1 require Java 21 or higher?

Spring Boot 4.0 already raised the baseline. Version 4.1 continues with the same modern Java requirements while keeping good compatibility.