v4.0.0-RC1

⭐ New Features

• Revisit metrics and tracing test properties #47776
• Downgrade to GraphQL Java 24.3 #47752
• Configure devtools to set trace probability to 100% by default #47721
• Remove "public" from referenced configurations from auto-configurations #47715
• Remove support for Spring Pulsar Reactive #47707
• Add Jackson 2 module to ease upgrade effort #47688
• Remove ConcurrentReferenceCachingMetadataReaderFactory #47687
• Remove integration for REST Docs' REST Assured support until REST Assured supports Groovy 5 #47685
• Remove support for embedded jar launch scripts #47666
• Remove support for Spring Session Data MongoDB #47662
• Remove support for Spring Session Hazelcast #47661
• Drop Spock until it supports Groovy 5 #47650
• Provide auto-configuration for Jackson's CBOR data format #47641
• Add support for @ObservationKeyValue #47637
• Rename Jackson-specific Json… annotations and classes to Jackson… #47625
• Use Neo4j Java Driver BOM #47623
• Add TWENTY_FIVE to JavaVersion enum #47616
• Rationalize endpoint packages #47606
• Refactor spring-boot-cloudfoundry package structure #47605
• Rename spring-boot-tx module to spring-boot-transaction #47603
• Use JsonMapper instead of ObjectMapper where feasible #47503
• Automatically detect Jackson 3 modules #47485
• Add AWS ECS to cloud platforms #47482
• Rename SharedObjectMapper to SharedJsonMapper #47471
• Provide a configuration property to auto-configure Jackson 3 for best compatibility with Spring Boot 3's Jackson 2 defaults #47470
• Raise GraalVM baseline to 25 #47433
• Clarify that spring-boot-rsocket does not require spring-web #47409
• Rationalize HTTP client configuration properties #47398
• Disable LiveReload server by default #47387
• Update Neo4j support to require Neo4j Java Driver 6.0.0 #47381
• Remove SQL and Reactor starters as they are only used transitively #47378
• Rationalize SSL bundle configuration in RedisConnectionDetails #47375
• Add support for RestTestClient #47335
• Rename Spring Session properties that depend on Spring Data #47333
• Rename JsonMapper-specific properties to make it clear that they're JSON-specific #47328
• Move spring.jackson.datetime.<feature-name> to spring.jackson.datatype.datetime #47327
• Modularize spring-boot-test-autoconfigure #47322
• Allow jars to be marked as a development-tool to exclude from uber-jar #47320
• Switch Maven plugin to exclude optional dependencies by default #47318
• Provide a configuration property for enabling and disabling Elasticsearch Client's sniffer #47301
• Add @ControllerAdvice support to RSocket messaging auto-configuration #47287
• Reintroduce previous EnvironmentPostProcessor in deprecated form #47272
• Remove Bitnami support #47267
• Improve how Spring AMQP's retry can be configured #47264
• Refine JSpecify annotations #47263
• Add support for configuring HttpClientTransport in JettyClientHttpConnectorBuilder #47251
• Raise the minimum supported version of the CycloneDX Gradle Plugin to 3.0.0 #47250
• Make all type exclude filters package-private #47227
• Rename …DataAutoConfiguration to Data…AutoConfiguration #47049
• Configure Lettuce with MicrometerTracing instead of MicrometerCommandLatencyRecorder when micrometer-tracing is available #46975
• Add support for static master-replica with Lettuce #46957
• Review and refine where possible war deployments following 4.0's modularisation #46944
• Remove unused SHA-1 hash from UNPACK markers #46520
• Adopt Framework's HttpMessageConverters #46411
• Add native image support for Log4J integration #46410
• Modularize spring-boot-test #46356
• Add support for in-memory Batch infrastructure #46307
• Package mappings and exchanges classes consistently #46217
• Introduce a shared abstraction for database initialization #46213
• Add FONTS location to StaticResourceLocation #46208
• Update Log4j's configuration using reconfigure rather than start #46035
• Drop spring-boot-loader-classic support #45714
• Allow DevTools property defaults to be contributed by modules #44792

🐞 Bug Fixes

• Signed jar verification fails when nested in an uber war running on an Oracle JVM #47772
• In an uber war, value of the Sbom-Location manifest attribute does not match the SBOM's actual location #47739
• Homebrew formula for the CLI should use libexec #47723
• When virtual threads are enabled, embedded Jetty does not use recommended virtual thread configuration #47718
• Dependency management for Hibernate is inconsistent #47698
• ClientHttpRequestFactoryRuntimeHints is missing timeout methods with Duration overloads #47679
• @AutoConfigureHttpGraphQlTester should not trigger the configuration of mockMvc #47660
• The 'spring.mongodb.representation.uuid' property cannot be bound #47654
• OnBeanCondition no longer correctly finds annotations on scoped target proxy beans #47636
• JavaVersion doesn't work reliably in native-image #47621
• Using CodecCustomizer requires explicit dependency on spring-boot-http-codec #47397
• Auto-configured JsonMapper backs off when any type of ObjectMapper is defined #47379
• LiquibaseEndpoint always uses defaultSchema instead of liquibaseSchema #47347
• Maven plugin does not provide an easy way to exclude opti...

v3.5.7

⭐ New Features

• Add TWENTY_FIVE to JavaVersion enum #47609

🐞 Bug Fixes

• Signed jar verification fails when nested in an uber war running on an Oracle JVM #47771
• In an uber war, value of the Sbom-Location manifest attribute does not match the SBOM's actual location #47737
• Homebrew formula for the CLI should use libexec #47722
• When virtual threads are enabled, embedded Jetty does not use recommended virtual thread configuration #47717
• ClientHttpRequestFactoryRuntimeHints is missing timeout methods with Duration overloads #47678
• OnBeanCondition no longer correctly finds annotations on scoped target proxy beans #47635
• JavaVersion doesn't work reliably in native-image #47620
• LiquibaseEndpoint always uses defaultSchema instead of liquibaseSchema #47346
• Launcher fails to find main method when it is parameterless #47311
• Package private Main class using Java 25 is not found by build plugins #47309
• Bitnami legacy images are not automatically detected #47275
• Maven plugin does not provide an easy way to exclude optional dependencies from uber jar #25403

📔 Documentation

• Some spring.test.* properties are not documented #47775
• Dependency management for Maven AntRun Plugin is missing changelog link #47744
• Developing Your First Spring Boot Application has outdated tools #47700
• Include deprecated configuration properties in the reference documentation #47669
• Aggregated Javadoc should link to the proper version of JakartaEE #47593
• Update javadoc of TestRestTemplate following change to redirect behavior #47474
• Use non-deprecated syntax to configure sourceCompatibility #47343
• Fix link to Framework's @Bean annotation #47330
• Update managed dependency version override examples in documentation #47306

🔨 Dependency Upgrades

• Upgrade to ActiveMQ 6.1.8 #47767
• Upgrade to Angus Mail 2.0.5 #47525
• Upgrade to AssertJ 3.27.6 #47526
• Upgrade to Byte Buddy 1.17.8 #47527
• Upgrade to Cassandra Driver 4.19.1 #47768
• Upgrade to Classmate 1.7.1 #47528
• Upgrade to Elasticsearch Client 8.18.8 #47671
• Upgrade to Glassfish JAXB 4.0.6 #47529
• Upgrade to GraphQL Java 24.3 #47755
• Upgrade to Groovy 4.0.29 #47713
• Upgrade to Hibernate 6.6.33.Final #47530
• Upgrade to HttpClient5 5.5.1 #47531
• Upgrade to HttpCore5 5.3.6 #47532
• Upgrade to Jakarta Mail 2.1.5 #47533
• Upgrade to Jakarta XML Bind 4.0.4 #47242
• Upgrade to Jetty 12.0.29 #47728
• Upgrade to Jetty Reactive HTTPClient 4.0.12 #47534
• Upgrade to jOOQ 3.19.27 #47536
• Upgrade to Logback 1.5.20 #47714
• Upgrade to Lombok 1.18.42 #47538
• Upgrade to Maven Compiler Plugin 3.14.1 #47539
• Upgrade to Micrometer 1.15.5 #47457
• Upgrade to Micrometer Tracing 1.5.5 #47458
• Upgrade to MongoDB 5.5.2 #47648
• Upgrade to MSSQL JDBC 12.10.2.jre11 #47612
• Upgrade to Netty 4.1.128.Final #47649
• Upgrade to Postgresql 42.7.8 #47540
• Upgrade to Pulsar 4.0.7 #47541
• Upgrade to R2DBC H2 1.0.1.RELEASE #47729
• Upgrade to R2DBC Postgresql 1.0.8.RELEASE #47542
• Upgrade to Reactor Bom 2024.0.11 #47459
• Upgrade to RxJava3 3.1.12 #47543
• Upgrade to Spring AMQP 3.2.8 #47614
• Upgrade to Spring Authorization Server 1.5.3 #47460
• Upgrade to Spring Batch 5.2.4 #47487
• Upgrade to Spring Data Bom 2025.0.5 #47461
• Upgrade to Spring Framework 6.2.12 #47462
• Upgrade to Spring GraphQL 1.4.3 #47754
• Upgrade to Spring Integration 6.5.3 #47615
• Upgrade to Spring LDAP 3.3.4 #47463
• Upgrade to Spring Pulsar 1.2.11 #47464
• Upgrade to Spring Security 6.5.6 #47465
• Upgrade to Spring Session 3.5.3 #47466
• Upgrade to Spring WS 4.1.2 #47467
• Upgrade to Tomcat 10.1.48 #47613
• Upgrade to Undertow 2.3.20.Final #47545
• Upgrade to WebJars Locator Lite 1.1.2 #47546

❤️ Contributors

Thank you to all the contributors who worked on this release:

@DKARAGODIN, @JinhyeokFang, @Lublanski, @Pankraz76, @fhiyo, @ngocnhan-tran1996, @nosan, @scottfrederick, and @xyraclius

v3.4.11

🐞 Bug Fixes

• In an uber war, value of the Sbom-Location manifest attribute does not match the SBOM's actual location #47735
• Homebrew formula for the CLI should use libexec #47696
• When virtual threads are enabled, embedded Jetty does not use recommended virtual thread configuration #47690
• ClientHttpRequestFactoryRuntimeHints is missing timeout methods with Duration overloads #47675
• OnBeanCondition no longer correctly finds annotations on scoped target proxy beans #47633
• JavaVersion doesn't work reliably in native-image #47619
• In an uber war, value of the Sbom-Location manifest attribute does not match the SBOM's actual location #47408
• LiquibaseEndpoint always uses defaultSchema instead of liquibaseSchema #47300
• Signed jar verification fails when nested in an uber war running on an Oracle JVM #47284
• Bitnami legacy images are not automatically detected #46983

📔 Documentation

• Dependency management for Maven AntRun Plugin is missing changelog link #47732
• Developing Your First Spring Boot Application has outdated tools #47699
• Include deprecated configuration properties in the reference documentation #47622
• Aggregated Javadoc should link to the proper version of JakartaEE #47592
• Use non-deprecated syntax to configure sourceCompatibility #47339
• Fix link to Framework's @Bean annotation #47329
• Update managed dependency version override examples in documentation #47304

🔨 Dependency Upgrades

• Upgrade to ActiveMQ 6.1.8 #47766
• Upgrade to Angus Mail 2.0.5 #47506
• Upgrade to Classmate 1.7.1 #47507
• Upgrade to Glassfish JAXB 4.0.6 #47508
• Upgrade to Groovy 4.0.29 #47711
• Upgrade to Hibernate 6.6.33.Final #47509
• Upgrade to HttpCore5 5.3.6 #47510
• Upgrade to Jakarta Mail 2.1.5 #47511
• Upgrade to Jakarta XML Bind 4.0.4 #47237
• Upgrade to Jaybird 5.0.10.java11 #47513
• Upgrade to Jetty 12.0.29 #47726
• Upgrade to Jetty Reactive HTTPClient 4.0.12 #47514
• Upgrade to jOOQ 3.19.27 #47516
• Upgrade to Logback 1.5.20 #47712
• Upgrade to Lombok 1.18.42 #47518
• Upgrade to Micrometer 1.14.12 #47446
• Upgrade to Micrometer Tracing 1.4.11 #47447
• Upgrade to MSSQL JDBC 12.8.2.jre11 #47607
• Upgrade to Netty 4.1.128.Final #47647
• Upgrade to Postgresql 42.7.8 #47519
• Upgrade to Pulsar 3.3.9 #47520
• Upgrade to R2DBC H2 1.0.1.RELEASE #47727
• Upgrade to R2DBC Postgresql 1.0.8.RELEASE #47521
• Upgrade to Reactor Bom 2024.0.11 #47448
• Upgrade to RxJava3 3.1.12 #47522
• Upgrade to Spring AMQP 3.2.8 #47610
• Upgrade to Spring Authorization Server 1.4.6 #47449
• Upgrade to Spring Batch 5.2.4 #47486
• Upgrade to Spring Data Bom 2024.1.11 #47450
• Upgrade to Spring Framework 6.2.12 #47451
• Upgrade to Spring Integration 6.4.8 #47611
• Upgrade to Spring LDAP 3.2.15 #47452
• Upgrade to Spring Pulsar 1.2.11 #47453
• Upgrade to Spring Security 6.4.12 #47454
• Upgrade to Spring Session 3.4.6 #47455
• Upgrade to Spring WS 4.0.16 #47456
• Upgrade to Tomcat 10.1.48 #47608
• Upgrade to Undertow 2.3.20.Final #47524

❤️ Contributors

Thank you to all the contributors who worked on this release:

@DKARAGODIN, @Lublanski, @fhiyo, @ngocnhan-tran1996, @nosan, @scottfrederick, and @xyraclius

v4.0.0-M3

⭐ New Features

• Deprecate JUnit 4 integration #47256
• Add support for SimpleTaskExecutor#cancel-remaining-tasks-on-close #47244
• Restructure foundational packages to remove dependency on 'org.springframework.boot' #47232
• Add configuration property for Tomcat's static resource cache max size #47229
• Introduce specialized interfaces in PropertiesConfigAdapter #47226
• Make ConfigDataLocation.of non-nullable #47221
• Make SanitizableData.key non-nullable #47220
• Add methods to connector and request factory builds to apply pre-packaged customizations #47205
• Finalize and document Spring Boot's HTTP Service client support #47179
• Revisit Kotlin Serialization integration #47178
• Remove explicit dependency management for Spring Authorization Server as it is now part of Spring Security #47174
• Adapt RetryTopicConfiguration now that Spring Kafka no longer relies on Spring Retry #47125
• Remove auto-configuration support for '@HttpServiceClient' #47123
• Adapt RabbitRetryTemplateCustomizer now that Spring AMQP no longer relies on Spring Retry #47122
• Rename spring.mongodb.uuid-representation #47052
• Remove Spring Data MongoDB dependency from MongoDB health support #47051
• Always use mongodb rather than mongo in MongoDB-related configuration properties #47050
• Remove GridFs from MongoConnectionDetails #47044
• Rename *DataProperties classes to Data*Properties #47043
• Add a configuration property for configuring Spring Data MongoDB's BigDecimal representation #47041
• Rename ConditionalOnEnabledTracing to ConditionalOnEnabledTracingExport #47029
• Update PropertyMapper to better support nullability #47024
• Drop support for Jersey, at least until it supports JAX-RS 4 (Jakarta EE 11) #47017
• Rename ScheduledTasksObservabilityAutoConfiguration to ScheduledTasksObservationAutoConfiguration #46995
• Refine JSpecify annotations #46926
• Introduce Kotlin Serialization auto-configuration #46546
• Exclude spring-boot-devtools from AOT processing in Maven #46533
• Improve Log4j Core configuration file detection for Log4j 3 #46409
• Remove dependency management for Spring Retry in favor of spring-core's new retry support #46309
• Optimize resource lookup in DevTools restart #46289
• Add support for authenticating with Elasticsearch using an API key #46167
• Remove isImmutable and getPrefix from OriginLookup #45547
• Update Jackson support to require Jackson 3 #45535
• Use a shaded version of org.json in spring-boot-configuration-metadata and spring-boot-cli #45504
• Replace @OptionalParameter with JSpecify's @Nullable #45390
• Create spring-boot-persistence module to house general persistence-related code and properties #45328
• Rename spring-boot-starter-aop to spring-boot-starter-aspectj #42948
• Rename MongoDB properties that do not require Spring Data MongoDB #34954
• Enable readiness and liveness probe endpoints by default #22825

🐞 Bug Fixes

• App fails to start when trying to use Prometheus without Actuator #47175
• Quoted -D arguments break system property resolution on Linux with Spring AOT #47167
• available() does not behave correctly when reading stored entries from a NestedJarFile #47058
• spring-boot-docker-compose doesn't create service connections when image has registry host but not project #47020
• Flyway Ignore Migration Patterns setting can't be set to an empty string #47014

📔 Documentation

• Default value of server.tomcat.resource.cache-ttl is not documented #47254
• Document Java 25 support #47248
• Fix links to Flyway reference documentation #46989
• Clarify Javadoc of Customizer interfaces about overriding behavior #46943

🔨 Dependency Upgrades

• Upgrade to Couchbase Client 3.9.1 #47129
• Upgrade to Ehcache3 3.11.1 #46893
• Upgrade to Elasticsearch Client 9.1.4 #47173
• Upgrade to Flyway 11.13.1 #47261
• Upgrade to Gson 2.13.2 #47153
• Upgrade to Hibernate 7.1.1.Final #47217
• Upgrade to HikariCP 7.0.2 #47060
• Upgrade to HtmlUnit 4.16.0 #47061
• Upgrade to HttpCore5 5.3.5 #47062
• Upgrade to Infinispan 15.2.6.Final #47063
• Upgrade to Jackson Bom 3.0.0-rc9 #47130
• Upgrade to Jakarta Activation 2.1.4 #47161
• Upgrade to Jakarta Mail 2.1.4 #47064
• Upgrade to Jaybird 6.0.3 #47065
• Upgrade to Jedis 6.2.0 #47045
• Upgrade to Jetty 12.1.1 #47131
• Upgrade to jOOQ 3.19.26 #47154
• Upgrade to Kafka 4.1.0 #47066
• Upgrade to Kotlin 2.2.10 #47067
• Upgrade to Lettuce 6.8.1.RELEASE #47046
• Upgrade to Lombok 1.18.40 #47068
• Upgrade to MariaDB 3.5.6 #47168
• Upgrade to Maven Failsafe Plugin 3.5.4 #47195
• Upgrade to Maven Shade Plugin 3.6.1 #47196
• Upgrade to Maven Surefire Plugin 3.5.4 #47197
• Upgrade to Micrometer 1.16.0-M3 #46996
• Upgrade to Micrometer Tracing 1.6.0-M3 #46997
• Upgrade to MongoDB 5.6.0 #47169
• Upgrade to Netty 4.2.6.Final #47132
• Upgrade to OpenTelemetry 1.54.0 #47133
• Upgrade to Pulsar 4.1.0 #47170
• Upgrade to R2DBC MSSQL 1.0.3.RELEASE #47171
• Upgrade to Reactor B...

v3.5.6

🐞 Bug Fixes

• Quoted -D arguments break system property resolution on Linux with Spring AOT #47166
• Groovy Templates fails with an NPE when rendering an auto new line #47139
• available() does not behave correctly when reading stored entries from a NestedJarFile #47057
• spring-boot-docker-compose doesn't create service connections when image has registry host but not project #47019
• Flyway Ignore Migration Patterns setting can't be set to an empty string #47013

📔 Documentation

• Default value of server.tomcat.resource.cache-ttl is not documented #47253
• Document Java 25 support #47245
• Fix links to Flyway reference documentation #46988
• Clarify Javadoc of Customizer interfaces about overriding behavior #46942

🔨 Dependency Upgrades

• Upgrade to Ehcache3 3.10.9 #47106
• Upgrade to Elasticsearch Client 8.18.6 #47094
• Upgrade to Gson 2.13.2 #47158
• Upgrade to Hibernate 6.6.29.Final #47216
• Upgrade to HikariCP 6.3.3 #47187
• Upgrade to HttpCore5 5.3.5 #47108
• Upgrade to Infinispan 15.2.6.Final #47109
• Upgrade to Jakarta Activation 2.1.4 #47188
• Upgrade to Jakarta Mail 2.1.4 #47110
• Upgrade to Jaybird 6.0.3 #47111
• Upgrade to Jetty 12.0.27 #47159
• Upgrade to jOOQ 3.19.26 #47160
• Upgrade to Lombok 1.18.40 #47113
• Upgrade to MariaDB 3.5.6 #47189
• Upgrade to Maven Failsafe Plugin 3.5.4 #47190
• Upgrade to Maven Shade Plugin 3.6.1 #47191
• Upgrade to Maven Surefire Plugin 3.5.4 #47192
• Upgrade to Micrometer 1.15.4 #47083
• Upgrade to Micrometer Tracing 1.5.4 #47084
• Upgrade to Netty 4.1.127.Final #47127
• Upgrade to R2DBC MSSQL 1.0.3.RELEASE #47193
• Upgrade to Reactor Bom 2024.0.10 #47085
• Upgrade to Spring AMQP 3.2.7 #47086
• Upgrade to Spring Batch 5.2.3 #47087
• Upgrade to Spring Data Bom 2025.0.4 #47088
• Upgrade to Spring Framework 6.2.11 #47089
• Upgrade to Spring GraphQL 1.4.2 #47090
• Upgrade to Spring Integration 6.5.2 #47091
• Upgrade to Spring Kafka 3.3.10 #47092
• Upgrade to Spring Pulsar 1.2.10 #47093
• Upgrade to Spring Security 6.5.5 #47257
• Upgrade to Tomcat 10.1.46 #47194
• Upgrade to Undertow 2.3.19.Final #47115
• Upgrade to XmlUnit2 2.10.4 #47243

❤️ Contributors

Thank you to all the contributors who worked on this release:

@Chanwon-Seo, @doljae, @izeye, and @quaff

v3.4.10

🐞 Bug Fixes

• available() does not behave correctly when reading stored entries from a NestedJarFile #47056
• Flyway Ignore Migration Patterns setting can't be set to an empty string #46984
• spring-boot-docker-compose doesn't create service connections when image has registry host but not project #46974
• Quoted -D arguments break system property resolution on Linux with Spring AOT #46555

📔 Documentation

• Default value of server.tomcat.resource.cache-ttl is not documented #47252
• Fix links to Flyway reference documentation #46976
• Clarify Javadoc of Customizer interfaces about overriding behavior #46938

🔨 Dependency Upgrades

• Upgrade to Ehcache3 3.10.9 #47096
• Upgrade to Hibernate 6.6.29.Final #47215
• Upgrade to HttpCore5 5.3.5 #47098
• Upgrade to Infinispan 15.0.21.Final #47099
• Upgrade to Jakarta Activation 2.1.4 #47181
• Upgrade to Jakarta Mail 2.1.4 #47100
• Upgrade to Jaybird 5.0.9.java11 #47101
• Upgrade to Jetty 12.0.27 #47156
• Upgrade to jOOQ 3.19.26 #47157
• Upgrade to Lombok 1.18.40 #47103
• Upgrade to Maven Failsafe Plugin 3.5.4 #47182
• Upgrade to Maven Shade Plugin 3.6.1 #47183
• Upgrade to Maven Surefire Plugin 3.5.4 #47184
• Upgrade to Micrometer 1.14.11 #47073
• Upgrade to Micrometer Tracing 1.4.10 #47074
• Upgrade to Netty 4.1.127.Final #47128
• Upgrade to R2DBC MSSQL 1.0.3.RELEASE #47185
• Upgrade to Reactor Bom 2024.0.10 #47075
• Upgrade to Spring AMQP 3.2.7 #47076
• Upgrade to Spring Batch 5.2.3 #47077
• Upgrade to Spring Data Bom 2024.1.10 #47078
• Upgrade to Spring Framework 6.2.11 #47079
• Upgrade to Spring Integration 6.4.7 #47080
• Upgrade to Spring Kafka 3.3.10 #47081
• Upgrade to Spring Pulsar 1.2.10 #47082
• Upgrade to Spring Security 6.4.11 #47258
• Upgrade to Tomcat 10.1.46 #47186
• Upgrade to Undertow 2.3.19.Final #47105
• Upgrade to XmlUnit2 2.10.4 #47238

❤️ Contributors

Thank you to all the contributors who worked on this release:

@Chanwon-Seo, @doljae, @izeye, and @quaff

v4.0.0-M2

⭐ New Features

• Rename metrics, observation, and tracing modules to include micrometer in their names and packages #46925
• Drop support for Undertow as it is not Servlet 6.1 compatible #46917
• Harmonize Logback's console and file logging charset #46846
• Make spring-boot-starter-opentelemetry produce OTLP output from instrumentation #46842
• Add '@HttpServiceClient' scanning auto-configuration #46782
• Add dependency management for JSpecify #46776
• Drop Actuator endpoint parameter support for javax.annotations.NonNull #46773
• Remove StreamBuilderFactoryBeanCustomizer in favor of Spring Kafka's StreamsBuilderFactoryBeanConfigurer #46675
• Rely on org.springframework.core.Nullness to determine if an Actuator endpoint is optional #46593
• Provide configuration property to disable console logging #46592
• Add JSpecify nullability annotations #46587
• Add auto-configuration and properties support for Spring Framework's new API Versioning #46519
• Ensure RestClient uses Virtual Thread Executor when spring.threads.virtual.enabled=true and JdkClientHttpRequestFactoryBuilder #46404
• Create spring-boot-autoconfigure-classic module #46233
• Auto-configure Elasticsearch's new Rest5Client rather than the legacy RestClient #46061
• Raise the minimum supported version of Gradle to 8.14 #43574
• Support Gradle 9 #43573
• Make auto-configurations final and remove public members #32883

🐞 Bug Fixes

• HTTP Service Client properties are not applied #46915
• Hazelcast health indicator reports the wrong status when Hazelcast has shut down due to an out-of-memory error #46910
• Configuration Metadata for Actuator endpoints does not take Nullness into account #46854
• Performance critical tracing code has high overhead due to the use of the Stream API #46845
• Default authorization server filter chain configuration is excluded in M1 release when actuator starter is on the classpath #46841
• SpringLiquibaseCustomizer is exposed outside its defined visibility scope #46759
• Race condition in OutputCapture can result in stale data #46722
• Auto-configured WebClient no longer uses context's ReactorResourceFactory #46684
• WebTestClientAutoConfiguration fails when WebFlux is on the classpath and spring-boot-http-codec is not #46678
• Default value not detected for a field annoted with @Name #46667
• Missing metadata when using @Name with a constructor-bound property #46664
• Missing property for Spring Authorization Server's PAR endpoint #46648
• Auto-configured MockMvc ignores @FilterRegistration annotation #46647
• Property name is incorrect when reporting a mis-configured OAuth 2 Resource Server JWT public key location #46637
• Memory not freed on context restart in JpaMetamodel#CACHE with spring.main.lazy-initialization=true #46635
• Failure to discover default value for a primitive should not lead to document its default value #46562
• WebTestClient is now bound to previous test server port when test application context is paused #46557
• Spring Boot 4.0.0-M1 has a typo in spring-boot-dependencies.pom for spring-boot-starter-opentelemetry #46549
• spring-boot-metrics with micrometer-registry-otlp throws exception if spring-boot-opentelemetry is missing #46303

📔 Documentation

• Update Servlet container system requirements #46918
• Kotlin samples for configuration metadata are in the wrong package #46858
• Observability examples in the reference guide are missing the Kotlin version #46799
• Align method descriptions for SslOptions getCiphers and getEnabledProtocols with '@returns' #46770
• Tracing samples in the reference guide are missing the Kotlin version #46768
• Improve Virtual Threads section to mention the changes in Java 24 #46611
• spring.test.webtestclient.timeout is not documented #46589
• spring-boot-test-autoconfigure should use the configuration properties annotation processor like other modules #46586
• spring.test.mockmvc properties are not documented #46579

🔨 Dependency Upgrades

• Upgrade to Angus Mail 2.0.4 #46735
• Upgrade to AssertJ 3.27.4 #46736
• Upgrade to Byte Buddy 1.17.7 #46887
• Upgrade to Couchbase Client 3.9.0 #46797
• Upgrade to Elasticsearch 9.1.0 #46686
• Upgrade to Elasticsearch Client 9.1.1 #46827
• Upgrade to Flyway 11.11.1 #46894
• Upgrade to GraphQL Java 25.0.beta-5 #46880
• Upgrade to Hibernate 7.1.0.Final #46738
• Upgrade to HikariCP 7.0.1 #46739
• Upgrade to HtmlUnit 4.15.0 #46895
• Upgrade to Jackson Bom 2.20.0-rc1 #46815
• Upgrade to Jedis 6.1.0 #46687
• Upgrade to Jetty 12.1.0 #46906
• Upgrade to Jetty Reactive HTTPClient 4.0.11 #46888
• Upgrade to jOOQ 3.19.25 #46809
• Upgrade to Json-smart 2.6.0 #46742
• Upgrade to Lettuce 6.8.0.RELEASE #46750
• Upgrade to MariaDB 3.5.5 #46810
• Upgrade to Maven Javadoc Plugin 3.11.3 #46889
• Upgrade to Micrometer 1.16.0-M2 #46811
• Upgrade to Micrometer Tracing 1.6.0-M2 #46812
• Upgrade to Mockito 5.19.0 #46896
• Upgrade to MSSQL JDBC 13.2.0.jre11 #46897
• Upgrade to MySQL 9.4.0 #46743
• Upgrade to Native Build Tools Plugin 0.11.0 #46501
• Upgrade to Netty 4.2.4.Final #46829
• Upgrade to OpenTelemetry 1.53.0 #46813
• Upgrade to Oracle Database 23.9.0.25.07 #46744
• Upgrade to Prometheus Client 1.4.1 [#46898](https://github.com/spring-project...

v3.5.5

🐞 Bug Fixes

• Hazelcast health indicator reports the wrong status when Hazelcast has shut down due to an out-of-memory error #46909
• Performance critical tracing code has high overhead due to the use of the Stream API #46844
• SpringLiquibaseCustomizer is exposed outside its defined visibility scope #46758
• Race condition in OutputCapture can result in stale data #46721
• Auto-configured WebClient no longer uses context's ReactorResourceFactory #46673
• Default value not detected for a field annoted with @Name #46666
• Missing metadata when using @Name with a constructor-bound property #46663
• Missing property for Spring Authorization Server's PAR endpoint #46641
• Property name is incorrect when reporting a mis-configured OAuth 2 Resource Server JWT public key location #46636
• Memory not freed on context restart in JpaMetamodel#CACHE with spring.main.lazy-initialization=true #46634
• Auto-configured MockMvc ignores @FilterRegistration annotation #46605
• Failure to discover default value for a primitive should not lead to document its default value #46561

📔 Documentation

• Kotlin samples for configuration metadata are in the wrong package #46857
• Observability examples in the reference guide are missing the Kotlin version #46798
• Align method descriptions for SslOptions getCiphers and getEnabledProtocols with @returns #46769
• Tracing samples in the reference guide are missing the Kotlin version #46767
• Improve Virtual Threads section to mention the changes in Java 24 #46610
• spring.test.webtestclient.timeout is not documented #46588
• spring-boot-test-autoconfigure should use the configuration properties annotation processor like other modules #46585
• Adapt deprecation level for management.health.influxdb.enabled #46580
• spring.test.mockmvc properties are not documented #46578

🔨 Dependency Upgrades

• Upgrade to Angus Mail 2.0.4 #46725
• Upgrade to AssertJ 3.27.4 #46726
• Upgrade to Byte Buddy 1.17.7 #46883
• Upgrade to Couchbase Client 3.8.3 #46794
• Upgrade to Elasticsearch Client 8.18.5 #46830
• Upgrade to Hibernate 6.6.26.Final #46884
• Upgrade to Hibernate Validator 8.0.3.Final #46728
• Upgrade to HikariCP 6.3.2 #46729
• Upgrade to Jersey 3.1.11 #46730
• Upgrade to Jetty 12.0.25 #46831
• Upgrade to Jetty Reactive HTTPClient 4.0.11 #46885
• Upgrade to jOOQ 3.19.25 #46808
• Upgrade to MariaDB 3.5.5 #46779
• Upgrade to Maven Javadoc Plugin 3.11.3 #46886
• Upgrade to Micrometer 1.15.3 #46701
• Upgrade to Micrometer Tracing 1.5.3 #46702
• Upgrade to MySQL 9.4.0 #46732
• Upgrade to Netty 4.1.124.Final #46832
• Upgrade to Pulsar 4.0.6 #46733
• Upgrade to Reactor Bom 2024.0.9 #46703
• Upgrade to REST Assured 5.5.6 #46849
• Upgrade to Spring Authorization Server 1.5.2 #46704
• Upgrade to Spring Data Bom 2025.0.3 #46705
• Upgrade to Spring Framework 6.2.10 #46706
• Upgrade to Spring Kafka 3.3.9 #46871
• Upgrade to Spring LDAP 3.3.3 #46707
• Upgrade to Spring Pulsar 1.2.9 #46708
• Upgrade to Spring RESTDocs 3.0.5 #46920
• Upgrade to Spring Security 6.5.3 #46709
• Upgrade to Spring Session 3.5.2 #46710
• Upgrade to Tomcat 10.1.44 #46734

❤️ Contributors

Thank you to all the contributors who worked on this release:

@Kguswo, @deejay1, @ganjisriver, @izeye, @jetflo, @ngocnhan-tran1996, @nicolasgarea, @nosan, @prishedko, @quaff, @schmidti159, @scordio, @shakuzen, @tommyk-gears, @zahra7, and @zakaria-shahen

v3.4.9

🐞 Bug Fixes

• Hazelcast health indicator reports the wrong status when Hazelcast has shut down due to an out-of-memory error #46877
• Performance critical tracing code has high overhead due to the use of the Stream API #46838
• SpringLiquibaseCustomizer is exposed outside its defined visibility scope #46752
• Race condition in OutputCapture can result in stale data #46685
• Default value not detected for a field annoted with @Name #46662
• Memory not freed on context restart in JpaMetamodel#CACHE with spring.main.lazy-initialization=true #46630
• Property name is incorrect when reporting a mis-configured OAuth 2 Resource Server JWT public key location #46627
• Missing metadata when using @Name with a constructor-bound property #46599
• Failure to discover default value for a primitive should not lead to document its default value #46551

📔 Documentation

• Observability examples in the reference guide are missing the Kotlin version #46775
• Kotlin samples for configuration metadata are in the wrong package #46774
• Align method descriptions for SslOptions getCiphers and getEnabledProtocols with @returns #46756
• Tracing samples in the reference guide are missing the Kotlin version #46699
• spring-boot-test-autoconfigure should use the configuration properties annotation processor like other modules #46584
• spring.test.webtestclient.timeout is not documented #46577
• spring.test.mockmvc properties are not documented #46576
• Adapt deprecation level for management.health.influxdb.enabled #46574
• Improve Virtual Threads section to mention the changes in Java 24 #46547

🔨 Dependency Upgrades

• Upgrade to Angus Mail 2.0.4 #46711
• Upgrade to Hibernate 6.6.26.Final #46881
• Upgrade to Hibernate Validator 8.0.3.Final #46713
• Upgrade to Infinispan 15.0.19.Final #46847
• Upgrade to Jersey 3.1.11 #46723
• Upgrade to Jetty 12.0.25 #46833
• Upgrade to Jetty Reactive HTTPClient 4.0.11 #46882
• Upgrade to jOOQ 3.19.25 #46807
• Upgrade to Micrometer 1.14.10 #46689
• Upgrade to Micrometer Tracing 1.4.9 #46690
• Upgrade to MySQL 9.4.0 #46715
• Upgrade to Netty 4.1.124.Final #46834
• Upgrade to Pulsar 3.3.8 #46716
• Upgrade to Reactor Bom 2024.0.9 #46691
• Upgrade to REST Assured 5.5.6 #46848
• Upgrade to Spring Authorization Server 1.4.5 #46692
• Upgrade to Spring Data Bom 2024.1.9 #46693
• Upgrade to Spring Framework 6.2.10 #46694
• Upgrade to Spring Kafka 3.3.9 #46870
• Upgrade to Spring LDAP 3.2.14 #46695
• Upgrade to Spring Pulsar 1.2.9 #46696
• Upgrade to Spring RESTDocs 3.0.5 #46919
• Upgrade to Spring Security 6.4.9 #46697
• Upgrade to Spring Session 3.4.5 #46698
• Upgrade to Tomcat 10.1.44 #46724

❤️ Contributors

Thank you to all the contributors who worked on this release:

@Kguswo, @Pankraz76, @deejay1, @ganjisriver, @izeye, @nicolasgarea, @nosan, @prishedko, @quaff, @schmidti159, @scordio, @shakuzen, @tommyk-gears, @zahra7, and @zakaria-shahen

v4.0.0-M1

⭐ New Features

• Move org.springframework.boot.autoconfigure.thread package to org.springframework.boot.thread #46406
• Add support for JmsClient #46293
• Rationalize starters following modularization #46245
• Provide better exception message when configuration properties binding fails due to class not found error #46232
• Migrate to Spring Batch 6 #46216
• Align reactive auto-configuration names #46156
• Create spring-boot-health module #46155
• Create spring-boot-hibernate module #46154
• Create spring-boot-tracing module #46153
• Create spring-boot-cloudfoundry module #46152
• Create spring-boot-servlet module #46151
• Create spring-boot-observation module #46150
• Create spring-boot-opentelemetry module #46149
• Create sping-boot-zipkin module #46148
• Create spring-boot-metrics module #46147
• Create spring-boot-graphql-test module #46146
• Create spring-boot-web-server module #46145
• Create spring-boot-websocket module #46144
• Create spring-boot-netty module #46143
• Create spring-boot-reactor module #46142
• Create spring-boot-graphql module #46141
• Create spring-boot-sql module #46140
• Create spring-boot-session modules #46139
• Create spring-boot-webflux module #46138
• Create spring-boot-security-saml2 module #46137
• Create spring-boot-security-oauth2-authorization-server #46136
• Create spring-boot-security-oauth2-resource-server module #46135
• Create spring-boot-security-oauth2-client module #46134
• Create spring-boot-security module #46133
• Create spring-boot-cache module #46132
• Create spring-boot-data-commons module #46131
• Create spring-boot-data-rest module #46130
• Create spring-boot-data-r2dbc module #46129
• Create spring-boot-data-jdbc module #46128
• Create spring-boot-data-couchbase module #46127
• Create spring-boot-data-redis module #46126
• Create spring-boot-webservices module #46125
• Create spring-boot-data-neo4j module #46124
• Create spring-boot-data-elasticsearch module #46123
• Create spring-boot-data-cassandra module #46122
• Create spring-boot-webmvc module #46121
• Create spring-boot-http-converter module #46120
• Create spring-boot-http-codec module #46119
• Create spring-boot-http-client module #46118
• Create spring-boot-hateoas module #46117
• Create spring-boot-jersey module #46116
• Create spring-boot-data-mongodb module #46115
• Create spring-boot-mongodb module #46114
• Create spring-boot-h2console module #46113
• Create spring-boot-gson module #46112
• Create spring-boot-sendgrid module #46111
• Create spring-boot-thymeleaf module #46110
• Create spring-boot-data-ldap module #46109
• Create spring-boot-ldap module #46108
• Create spring-boot-quartz module #46107
• Create spring-boot-neo4j module #46106
• Create spring-boot-mustache module #46105
• Create spring-boot-cassandra module #46104
• Create spring-boot-couchbase module #46103
• Create spring-boot-jooq module #46101
• Create spring-boot-batch module #46100
• Create spring-boot-hazelcast module #46099
• Create spring-boot-integration module #46098
• Create spring-boot-rsocket module #46097
• Create spring-boot-data-jpa module #46096
• Create spring-boot-jpa module #46095
• Create spring-boot-r2dbc module #46094
• Create spring-boot-pulsar module #46093
• Create spring-boot-kafka module #46092
• Create spring-boot-elasticsearch module #46091
• Create spring-boot-freemarker module #46090
• Create spring-boot-groovy-templates module #46089
• Create spring-boot-liquibase module #46088
• Create spring-boot-validation module #46087
• Create spring-boot-flyway module #46086
• Create spring-boot-jdbc module #46085
• Create spring-boot-tx module #46084
• Create spring-boot-artemis module #46083
• Create spring-boot-activemq module #46082
• Create spring-boot-jms module #46081
• Create spring-boot-jsonb module #46080
• Create spring-boot-mail module #46079
• Create spring-boot-jackson-module #46078
• Create spring-boot-amqp module #46077
• Create spring-boot-reactor-netty module #46076
• Create spring-boot-jetty module #46075
• Create spring-boot-undertow module #46074
• Create spring-boot-tomcat module #46073
• Publish milestones and release candidates to Maven Central #46024
• Support @MeterTag on @Counted and @Timed methods #46007
• Support pluggable types for EndpointObjectMapper [#45876](https://github.com/spring-projects/spring-b...