spring-projects/spring-boot v2.3.3.RELEASE on GitHub

⚠️ Upgrading from 2.3.2.RELEASE

If you've applied a configuration workaround for an issue about missing liveness/readiness probes #22562, you should ensure that this workaround is removed when upgrading to 2.3.3.RELEASE.

⭐ New Features

Jetty with Conscrypt no longer a requirement for easy HTTP/2 #22188

🪲 Bug Fixes

Externalized Configuration ignores null values in SPRING_APPLICATION_JSON #22895
Legacy endpoint ids with '-' do not migrate cleanly #22849
When Reactor's debug agent fails to initialize, the cause of the failure is discarded #22847
OCI image build fails if environment has any empty properties #22703
LiquibaseEndpoint does not report change sets from ancestor contexts #22686
Requests that should be handled by an additional DispatcherServlet result in a 404 response #22682
Async exceptions not handled by error pages in war deployments #22672
XADataSourceAutoConfiguration is difficult to use with DB2XADataSource as it does not have a URL property #22641
TaskExecutorBuilder only uses second-precision when configuring the await termination period #22611
Setting ignoreInvalidFields=true on @ConfigurationProperties causes unknown fields to be ignored as well #22585
Spring Boot 2.3.2: new context is created for every IT class if SpyBean is used #22583
Background preinitialisation may cause Jackson2ObjectMapperBuilder's Kotlin detection warning to be silently dropped #22580
UndertowWebServerFactoryCustomizer does not support Options but only UndertowOptions #22578
WebMvcTest and WebFluxTest do not include Jackson Module beans #22576
CouchbaseCacheManager can no longer be customized using CacheManagerCustomizer #22573
Kubernetes readiness probe endpoint returning 404 #22562
CouchbaseCacheConfiguration is not ordered properly #22542
MustacheEnvironmentCollector with nullValue compiler option no longer works in version 2.3.1 #22039

📔 Documentation

PushGateway documentation does not document enabled flag properly #22930
Default value of server.jetty.accesslog.format is wrongly associated to server.forward-headers-strategy #22921
Use wildcard in BP_JVM_VERSION with image building #22916
Kotlin examples for configuring bootBuildImage's environment use wrong map configuration syntax #22913
Mention configuration customizers for WebTestClient and RestAssured in AutoConfigureRestDocs' javadoc #22910
Document how to discover the HTTP Port at Runtime for both Servlet and Reactive web apps #22899
Document that spring-boot-configuration-processor cannot detect default value defined externally #22890
Docs say Health's inner details section may contain components #22774
Fix wrong reference in ReadinessStateHealthIndicator javadoc #22760
Recommend the use of AopTestUtils.getTargetObject() when setting expectations on a spied bean that Spring has proxied #22758
Document that schema.sql and data.sql will still be run when using Flyway or Liquibase but discourage their use #22748
Fix broken links to Micrometer registry docs #22706
Clarify documentation on use of @AutoConfigureRestDocs with WebTestClient #22669
Document that constructor binding does not support @DurationUnit and @DataSizeUnit #22665
Document properties to enable probe health indicators #22631
Update metrics documentation to note the benefits of using a MeterBinder when registering a metric that relies on other beans #22629
Include a hint where to find documentation for DevTools in docs overview #22622
Fix link to Elasticsearch health indicator #22617
Add ElasticsearchReactiveHealthIndicator to docs #22616
Link to App Engine Standard sample not working #22608
Improve documentation about swapping one technical starter for another #22596
Document how to use MongoClientSettingsBuilderCustomizer #22589
Document the need for configuration files to have a file extension #22587
Document that java.util.Optional is not recommended with ConfigurationProperties #22574
Typo in metadata for "management.health.readinessstate.enabled" #22560
Document how to opt back in to DataSource auto-configuration when using R2DBC #22094
Document that application.conf is not read by default when using the Cassandra auto-configuration #21787
Document how to use Gradle's native bom support as an alternative to the dependency management plugin #21570

🔨 Dependency Upgrades

Upgrade to Micrometer 1.5.4 #22932
Upgrade to Spring Security 5.3.4.RELEASE #22873
Upgrade to Spring HATEOAS 1.1.1.RELEASE #22872
Upgrade to RSocket 1.0.2 #22871
Upgrade to Pooled JMS 1.1.2 #22870
Upgrade to Lettuce 5.3.3.RELEASE #22869
Upgrade to Kafka 2.5.1 #22868
Upgrade to jOOQ 3.13.4 #22867
Upgrade to Jetty 9.4.31.v20200723 #22866
Upgrade to Jackson Bom 2.11.2 #22865
Upgrade to Hibernate 5.4.20.Final #22864
Upgrade to Dropwizard Metrics 4.1.12.1 #22863
Upgrade to Dependency Management Plugin 1.0.10.RELEASE #22862
Upgrade to Couchbase Client 3.0.7 #22861
Upgrade to Commons Pool2 2.8.1 #22860
Upgrade to Byte Buddy 1.10.14 #22859
Upgrade to Spring Data Neumann SR3 #22844
Upgrade to Spring Kafka 2.5.5 #22843
Upgrade to Spring AMQP 2.2.10 #22842
Upgrade to Reactor Dysprosium-SR11 #22841

❤️ Contributors

We'd like to thank all the contributors who worked on this release!