Spring Boot 2.2.0 M6 Release Notes

For changes in earlier milestones, please refer to:

Upgrading from Spring Boot 2.1

See instructions in the 2.2.0.M1 release notes for upgrading from Spring Boot 2.1.

Health Indicator

A number of classes have been deprecated to implement the new health indicator groups feature. If you are configuring a custom HealthIndicator via CompositeHealthIndicatorConfiguration, you’ll need to update it to use CompositeHealthContributorConfiguration instead.

New and Noteworthy

Tip	Check the configuration changelog for a complete overview of the changes in configuration.

Health Indicator Groups

It is now possible to organize health indicators into groups. A typical example if you deploy your application to Kubernetes, you may want one different sets of health indicators for your “liveness” and “readiness” probes.

Groups can be configured via configuration properties. The following create a custom group with only the DataSource indicator:

management.endpoint.health.group.custom.include=db

The custom group can be invoked by hitting localhost:8080/actuator/health/custom.

Check the updated reference documentation for more details.

Auto-configuration for Flyway JavaMigrations

Flyway will be auto-configured to use any JavaMigration beans that are found in the application context.

Sanitization of URI Properties in Actuator Endpoints

The sanitization performed by the configprops and env endpoints has been improved to include URI properties. Any password found in the URI’s user information will now be sanitized.

Dependency Upgrades

Spring Boot 2.2.0.M6 moves to new versions of several Spring projects:

Spring Framework 5.2.0.RC2
Reactor Dysprosium-RC1
Spring AMQP 2.2.0.RC1
Spring Data Moore-RC3
Spring Integration 5.2.0.RC1
Spring Kafka 2.3.0.RC1
Spring Security 5.2.0.RC1
Spring Session Corn-M4

Numerous third-party dependencies have also been updated, some of the more noteworthy of which are the following:

Flyway 6.0.1
Kotlin 1.3.50
Git commit id plugin 3.0.1

Miscellaneous

In addition to the changes listed above, there have also been lots of minor tweaks and improvements including:

Configurable timeout for JMS listener container’s receive
Support for Spring Session’s flush mode
Support for Spring AMQP’s confirm-type
Application properties for configuring Jetty’s thread pool
Support for parallel test execution when using @AutoConfigureMockMvc with JUnit 5