spring-projects/spring-boot v3.0.0-M4 on GitHub

⭐ New Features

Auto-configure Spring Data's new ReactiveElasticsearchClient in place of the old one #31755
Add auto-configuration for JdkClientHttpConnector #31709
Drop support for String path matching for MVC endpoint handler mappings #31700
Enable GraalVM reachability metadata repository #31687
Add config property for KafkaAdmin modifyTopicConfigs #31679
Reinstate support for Hibernate metrics #31675
AOT support for Actuator #31671
Upgrade to Spring REST Docs 3.0.0-M4 #31621
Support deriving a DataSourceBuilder from a wrapped DataSource #31605
Add a configuration property for the trusted proxies of Tomcat's Remote IP valve #31576
Remove --allow-incomplete-classpath from native-image arguments #31568
Adapt to change in default strategy for URL path matching in Spring MVC #31547
Allow Jackson's lazily created standard JDK serializers to be used in a native image #31537
Add support for property binding in SpringApplication when running in native-image #31534
Add resource hints for schema and data scripts #31533
Add native-image support for JavaLoggingSystem #31531
Allow HTTP message converters to be auto-configured in a native image that is not a web app #31528
Remove YamlJsonParser #31498
Raise the minimum supported version of Kotlin to 1.7 #31391
Add PropertyMapper.to(...) API designed for immutable instances #31323
Do not auto-configure a ReactiveUserDetailsService when an AuthenticationManagerResolver bean is present #31317
Add resource hints for application properties #31311
Add resource hints for default templates location #31310
Disable tracing in integration tests #31308
Add Runnable variant of TestPropertyValues.applyToSystemProperties #31303
Add a method to ApplicationContextRunner that prepares but does not refresh the context #31302
Apply initializers and bean registrations before registering classes in ApplicationContextRunner #31280
Add resource hints for serving static web content #31278
Add AOT support for immutable configuration properties #31247
Register runtime hints for @ConfigurationProperties annotation #31227
Raise the minimum supported version of Gradle to 7.5 #31215
Remove redundant throws declarations from public APIs #31179
Support management contexts with AOT #31163
Auto-configure JvmCompilationMetrics #31151
Allow Prometheus PushGateway to be configured to perform a PUT on shutdown #31104
Add WebClient based sender for Zipkin #30792
Remove support for Elasticsearch's RestHighLevelClient #30647
Support new ElasticsearchClient #28597
Move auto-configuration for reactive Elasticsearch client into o.s.b.autoconfigure.elasticsearch #28068
Allow configuring WebDriver with TestNG #27947
Remove spring.session.store-type in favor of a defined order for which implementation will win when multiple are available #27756
Remove support for running multiple Spring Batch jobs #25373

🐞 Bug Fixes

Publishing a docker image to a private registry fails without authentication #31825
In a non-reactive application, health indicators in a parent context are not found #31819
Dependency management for Derby is incomplete #31815
A router function with attributes causes /actuator/mappings to return a 500 response due to an UnsupportedOperationException #31807
InstanceAlreadyExistsException when using Actuator with multiple context and JMX enabled #31805
A project dependency on a Java library does not make the library's resources visible to AOT source generation #31803
Using 'ImportAutoConfigurationImportSelector' in the jar package loaded by a custom class loader throws ClassNotFoundException #31802
Trailing whitespace in the value of a property is hard to identify in failure analysis descriptions #31781
Log4j2's shutdown hook is not disabled when using Log4j 2.18 or later #31733
spring-boot-starter-jetty does not use the official Jakarta Servlet and WebSocket APIs #31720
HTTP Server and Data repositories metrics record null for the description #31707
Deprecation hint for spring.data.mongodb.grid-fs-database is located in the wrong section #31691
Image building fails with latest Paketo base builder and additional buildpacks configured #31559
Tomcat fails to start when PEM files are used and key-store-password is not specified #31529
Values in a spring.data.cassandra.config file can't override some defaults defined in CassandraProperties #31504
@RestControllerAdvice @ExceptionHandler Inconsistent behavior with @RestControllerEndpoint #31502
Malformed json causes BasicJsonParser to throw a NullPointerException #31500
Metadata generated by the configuration properties annotation processor can miss inherited properties from nested classes #31485
OAuth2 Resource Server Auto-Configuration can only configure a single JWS algorithm #31404
JarFile implementation calls close early which breaks verification of signed unpacked nested jars on Oracle JDK #31396
Health indicators that take a long time to respond are difficult to diagnose #31385
Maven shade plugin configuration in spring-boot-starter-parent does not append META-INF/spring/*.imports files #31368
ZipkinConfigurations.SenderConfiguration uses @ConditionalOnClass on a @Bean method #31353
Custom Converter annotated with @ConfigurationPropertiesBinding does not get selected if targetType has a static factory method different return type #31342
Zipkin auto-configuration should not back off on custom SpanHandler #31273
Micrometer tracing auto-configuration doesn't register all ObservationHandlers #31272
spring-boot-dependencies manages spring-ldap-ldif-batch which no longer exists #31256
ConfigurationPropertiesBeanFactoryInitializationAotProcessor does not handle singleton #31248
When building with Maven, classes generated by AOT are not included in final artifact #31245
Base packages are not contributed with AOT #31223
Prevent main method to continue once the AOT context has been optimized #31219
Dependency task can fail due to BootJar and BootWar afterResolve hooks #31214
spring-configuration-metadata.json is missing for additional-spring-configuration-metadata.json after switching from @Configuration to @AutoConfiguration #31191
MimeMappings does not include application/wasm #31189
Dependency management for mimepull is redundant and the managed version is incompatible with Java 8 #31187
Binder(ConfigurationPropertySource... sources) does not assert that sources contains only non-null elements #31184
WebMvcMetricsFilter stopped working since 2.7.0 #31152

📔 Documentation

Clarify how docker image publishing registry is determined #31827
Fix deprecations in javadocs #31713
Remove Jolokia references from the documentation #31549
Make SpringApplication Kotlin samples idiomatic #31466
Harmonize Kotlin example #31461
Remove duplicate content from "The Spring WebFlux Framework" section #31382
Document that property placeholders should use the canonical property name form #31370
Fix typos in the reference documentation #31367
Enable Links for the Javadoc of the Gradle Plugin #31363
Remove "earlier in this chapter" from places where content is now elsewhere in the documentation #31361
Restore custom favicon documentation #31359
Document that when using Lombok it must be configured to run before spring-boot-configuration-processor #31357
Use Lambda-based API in Spring Security examples #31355
Fix typo in name of imports file in javadoc of ImportCandidates.from #31340
Update Dynatrace Micrometer registry documentation #31339
Typos in documentation ("spring-factories" instead of "spring.factories") #31207
Fix Custom Layers Configuration section title in Maven plugin docs #31181
Add link to 'Error Handling Spring Boot Starter' #31156

🔨 Dependency Upgrades

Upgrade to Artemis 2.23.1 #31583
Upgrade to AssertJ 3.23.1 #31331
Upgrade to Byte Buddy 1.12.12 #31625
Upgrade to Caffeine 3.1.1 #31626
Upgrade to Couchbase Client 3.3.2 #31627
Upgrade to Dependency Management Plugin 1.0.12.RELEASE #31557
Upgrade to Derby 10.16.1.1 #31584
Upgrade to Dropwizard Metrics 4.2.10 #31628
Upgrade to Flyway 9.0.1 #31723
Upgrade to Groovy 4.0.3 #31631
Upgrade to H2 2.1.214 #31632
Upgrade to Hazelcast 5.1.2 #31633
Upgrade to Hibernate 6.1.1.Final #31674
Upgrade to HtmlUnit 2.63.0 #31758
Upgrade to HttpCore5 5.1.4 #31759
Upgrade to InfluxDB Java 2.23 #31635
Upgrade to Jakarta Json 2.0.2 #31636
Upgrade to Jakarta Validation 3.0.2 #31637
Upgrade to Jedis 4.2.3 #31586
Upgrade to Jetty 11.0.11 #31639
Upgrade to Jetty Reactive HTTPClient 3.0.6 #31638
Upgrade to jOOQ 3.17.2 #31640
Upgrade to JsonAssert 1.5.1 #31641
Upgrade to Kotlin 1.7.10 #31642
Upgrade to Kotlin Coroutines 1.6.4 #31760
Upgrade to Lettuce 6.2.0.RELEASE #31761
Upgrade to Liquibase 4.13.0 #31762
Upgrade to Log4j2 2.18.0 #31589
Upgrade to MariaDB 3.0.6 #31644
Upgrade to Maven Assembly Plugin 3.4.1 #31645
Upgrade to Maven Deploy Plugin 3.0.0 #31832
Upgrade to Maven Enforcer Plugin 3.1.0 #31591
Upgrade to Maven Install Plugin 3.0.0 #31833
Upgrade to Maven Invoker Plugin 3.3.0 #31592
Upgrade to Micrometer 1.10.0-M3 #31617
Upgrade to Micrometer Tracing 1.0.0-M6 #31657
Upgrade to Mockito 4.6.1 #31332
Upgrade to MongoDB 4.7.0-beta0 #31763
Upgrade to Neo4j Java Driver 4.4.9 #31764
Upgrade to Netty 4.1.79.Final #31765
Upgrade to OkHttp 4.10.0 #31593
Upgrade to OpenTelemetry 1.16.0 #31766
Upgrade to Oracle Database 21.6.0.0.1 #31595
Upgrade to Postgresql 42.4.0 #31596
Upgrade to Prometheus Client 0.16.0 #31597
Upgrade to R2DBC 1.0 and adapt to r2dbc-bom no longer being published #31702
Upgrade to Rabbit AMQP Client 5.15.0 #31598
Upgrade to Reactive Streams 1.0.4 #31649
Upgrade to Reactor 2022.0.0-M4 #31609
Upgrade to REST Assured 5.1.1 #31333
Upgrade to RxJava3 3.1.5 #31650
Upgrade to Selenium HtmlUnit 3.62.0 #31600
Upgrade to SendGrid 4.9.3 #31652
Upgrade to Spring Batch 5.0.0-M4 #31623
Upgrade to Spring Data 2022.0.0-M5 #31619
Upgrade to Spring Framework 6.0.0-M5 #31241
Upgrade to Spring HATEOAS 2.0.0-M5 #31683
Upgrade to Spring Integration 6.0.0-M4 #31624
Upgrade to Spring Kafka 3.0.0-M5 #31620
Upgrade to Spring Security 6.0.0-M6 #31622
Upgrade to Tomcat 10.0.22 #31653
Upgrade to Undertow 2.2.18.Final #31654
Upgrade to Versions Maven Plugin 2.11.0 #31601
Upgrade to WebJars Locator Core 0.52 #31602

❤️ Contributors

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