:star: New Features

• ClassLoader can be null in DeserializingConverter and should be annotated with @Nullable #30672
• Performance optimization in AbstractBeanFactoryBasedTargetSource.hashCode() #30585
• Consistent support for MultiValueMap and common Map implementations in CollectionFactory #30441
• Reject null and empty SpEL expressions #30373
• Introduce Environment.matchesProfiles() for profile expressions #30226

:lady_beetle: Bug Fixes

• Change of behaviour for UUID in bean validation output in v5.3.27 #30662
• Spring Framework 5.3.27 appears to cause issues in OSGi environment #30637
• Inconsistent ProxyCallbackFilter#equals/hashCode methods in CglibAopProxy #30616
• EclipseLinkJpaDialect: Unexpected default isolation levels #30589
• ThreadLocalTargetSource does not include actual target bean name in NamedThreadLocal #30586
• ApplicationListenerMethodAdapter inconsistently publishes events from CompletableFuture #30584
• For @Bean method that returns null, @Autowired injects NullBean instead of null for cached arguments #30551
• Make maximum SpEL expression length configurable #30446
• Respect TaskDecorator configuration on DefaultManagedTaskExecutor #30443

:notebook_with_decorative_cover: Documentation

• Document which @Scheduled attributes support SpEL expressions #30642
• FileSystemUtils::deleteRecursively Javadoc refers to File instead of Path #30555

:hammer: Dependency Upgrades

• Upgrade to Reactor 2020.0.33 #30656