:star: New Features

• Provide caching for HandlerMappingIntrospector lookups #31588
• Log4jLog needs to re-resolve ExtendedLogger on deserialization (for compatibility with Log4J 2.21) #31582
• Optimize StandardTypeLocator for hotspot when the same classes are resolved #31579
• Add duplicate key exception error code for SAP HANA database #31554
• Do not delegate TRACE to HttpServlet on ERROR dispatch #31457
• Add properties setter to ProblemDetail #31430

:lady_beetle: Bug Fixes

• GeneratedFiles#addSource does not provide proper context if the specified class name is invalid #31612
• MessageBuilder#createMessage should not define the payload as @Nullable #31610
• Default Mixin added by Jackson2ObjectMapperBuilder are missing required runtime hints #31606
• NettyDataBuffer#toByteBuffer fails if readPosition > 0 #31605
• Avoid duplicate JAR resources in PathMatchingResourcePatternResolver on MS Windows #31598
• NamedParameterUtils broken parsing related to square brackets #31596
• Multipart cleanup is done too eagerly #31567
• Jakarta validation field constraints in superclass are ignored in native image #31552
• Function column out doesn't resolve to SqlOutParameter #31550
• Restore support for recursive annotations in Kotlin #31518
• Resolve to empty MultiValueMap when no matrix variables are provided #31483
• ProxyFactoryBean declaration may lead to unexpected non-fatal "FactoryBean threw exception from getObjectType" stacktrace output #31473
• Use of @Value in compact constructor of a record should not register method injection #31433
• Prevent duplicate HTTP server observations for cancelled exchanges #31417
• Spring MVC raises MissingPathVariableException resulting in 500 instead of 400 error when path segment is u001F or u00D and cannot be converted to target type UUID #31382
• Ensure consistent value count in ConcurrentReferenceHashMap#Segment #31373
• HeaderContentNegotiationStrategy.resolveMediaTypes throws unexpected IllegalArgumentException #31254
• Session Cookie in Reactive WebSession is not deleted if maxAge is set through cookie initializer (e.g. via Boot application property) #31214
• DefaultWebClient logs URI without the port number #30519
• CGLIB BeanCopier falls back to ClassLoader.defineClass for public target #28699
• BeanUtils.copyProperties() consumes large amount of memory #27246

:notebook_with_decorative_cover: Documentation

• RestTemplate initialization documentation in 6.0.x mentions Netty, yet no ClientHttpRequestFactory is present in the package. #31526
• Correct typo in annotations.adoc #31519
• Document X-Forwarded-* Headers #31491
• Improve support and documentation for the "default" bean definition profile name #29071
• Document that pertypewithin is supported by Spring AOP #25887
• Document alternatives of using multiple PropertyPlaceholderConfigurers [SPR-9989] #14623

:hammer: Dependency Upgrades

• Upgrade to Micrometer 1.10.13 #31586
• Upgrade to Reactor 2022.0.13 #31585

:heart: Contributors

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

@CrotchBurnt, @GVictorG7, @PiotrFLEURY, @baratrax, @bernie-schelberg-invicara, @huyachigege, @izeye, @lorenzsimon, @martin-lukas, and @rwinch