:star: New Features

• Throw PessimisticLockingFailureException/CannotAcquireLockException instead of plain ConcurrencyFailureException #29675
• Introduce additional constructors in MockClientHttpRequest and MockClientHttpResponse #29670
• Fall back to JdkClientHttpConnector as ClientHttpConnector #29645
• Optimize object creation in RequestMappingHandlerMapping#handleNoMatch #29634
• Align multipart codecs on client and server #29630
• Deprecate "application/graphql+json" media type after spec changes #29617
• HTTP interface client does not call FormHttpMessageWriter when writing form data #29615
• ProblemDetail doesn't override the equals method #29606
• Add title to SockJS iFrames for accessibility compliance #29594
• Forbid loading of a test's ApplicationContext in AOT mode if AOT processing failed #29579
• Deprecate JettyWebSocketClient in favor of StandardWebSocketClient #29576
• Improve options to expose MessageSource formatted errors for a ProblemDetail response #29574
• Make @ModelAttribute and @InitBinder annotations @Reflective #29572
• Update BindingReflectionHintsRegistrar to support properties on records #29571

:lady_beetle: Bug Fixes

• Cannot use WebDAV methods in Spring MVC 6.0 anymore #29689
• AnnotatedElementUtils.findMergedRepeatableAnnotations does not fetch results when other attributes exist in container annotation #29685
• BeanWrapperImpl NPE in setWrappedInstance after invoking getPropertyValue #29681
• SpEL ConstructorReference does not generate AST representation of arrays #29665
• NullPointerException in BindingReflectionHintsRegistrar for anonymous classes #29657
• DataBufferInputStream violates InputStream contract #29642
• Component scanning no longer uses component index for @Named, @ManagedBean, and other Jakarta annotations #29641
• Fix canWrite in PartHttpMessageWriter #29631
• NoHandlerFoundException mistakenly returns request headers from ErrorResponse#getHeaders #29626
• URI override for @HttpExchange doesn't work if there are both URI and @PathVariable method parameters #29624
• Unnecessary parameter name introspection for constructor-arg resolution (leading to LocalVariableTableParameterNameDiscoverer warnings) #29612
• Set detail from reason in both constructors of ResponseStatusException #29608
• SpEL string literal misses single quotation marks in toStringAST() #29604
• AOT code generation fails for bean of type boolean #29598
• request-scoped bean with @Lazy fails in native image (due to missing detection of CGLIB lazy resolution proxies) #29584
• 500 error from WebFlux when parsing Content-Type leads to InvalidMediaTypeException #29565
• ConcurrentLruCache implementation is using too much heap memory #29520
• Duplicate key violation gets translated to DataIntegrityViolationException instead of DuplicateKeyException in Spring 6 #29511
• SpEL: Two double quotes are replaced by one double quote in single quoted String literal (and vice versa) #28356

:notebook_with_decorative_cover: Documentation

• Fix ErrorResponse#type documentation #29632
• Fix typo in observability documentation #29590
• Consistent documentation references to Jakarta WebSocket (2.1) #29581
• Unrendered asciidoc headings in reference documentation #29569
• Document observability support #29524

:hammer: Dependency Upgrades

• Upgrade to Apache HttpClient 5.2 #29627
• Upgrade to Gradle 7.6 #29583
• Upgrade to Micrometer 1.10.2 #29678
• Upgrade to Reactor 2022.0.1 #29679

:heart: Contributors

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

@Aashay-Chapatwala, @CoderYellow, @ShenFeng312, @Spark61, @divcon, @izeye, @koo-taejin, @mdeinum, @mhalbritter, @quaff, and @singhbaljit