Upgrading from Spring Boot 3.1.6 -> 3.2.0 has made applications with Spring Cloud Open Feign unable to launch. An IllegalArgumentException: Invalid value type for attribute 'factoryBeanObjectType': java.lang.String is thrown.

Github Example.

Feign Client (Spring Cloud Starter OpenFeign v. 4.0.4)

@FeignClient(name = "test", url = "localhost:8081")
public interface ExampleFeignClient {

  @GetMapping(value = "/")
  String testGet();
}

Main: 

@EnableFeignClients
@SpringBootApplication
public class SpringBootOpenFeignCompatibilityApplication {

  public static void main(String[] args) {
    SpringApplication.run(SpringBootOpenFeignCompatibilityApplication.class, args);
  }

The above code works with Spring Boot 3.1.6, but in 3.2.0, it results in the following stacktrace:

java.lang.IllegalStateException: Error processing condition on org.springframework.boot.autoconfigure.context.PropertyPlaceholderAutoConfiguration.propertySourcesPlaceholderConfigurer
    at org.springframework.boot.autoconfigure.condition.SpringBootCondition.matches(SpringBootCondition.java:60) ~[spring-boot-autoconfigure-3.2.0.jar:3.2.0]
    at org.springframework.context.annotation.ConditionEvaluator.shouldSkip(ConditionEvaluator.java:108) ~[spring-context-6.1.1.jar:6.1.1]
    at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitionsForBeanMethod(ConfigurationClassBeanDefinitionReader.java:183) ~[spring-context-6.1.1.jar:6.1.1]
    at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitionsForConfigurationClass(ConfigurationClassBeanDefinitionReader.java:144) ~[spring-context-6.1.1.jar:6.1.1]
    at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitions(ConfigurationClassBeanDefinitionReader.java:120) ~[spring-context-6.1.1.jar:6.1.1]
    at org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(ConfigurationClassPostProcessor.java:428) ~[spring-context-6.1.1.jar:6.1.1]
    at org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanDefinitionRegistry(ConfigurationClassPostProcessor.java:289) ~[spring-context-6.1.1.jar:6.1.1]
    at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanDefinitionRegistryPostProcessors(PostProcessorRegistrationDelegate.java:349) ~[spring-context-6.1.1.jar:6.1.1]
    at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:118) ~[spring-context-6.1.1.jar:6.1.1]
    at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:775) ~[spring-context-6.1.1.jar:6.1.1]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:597) ~[spring-context-6.1.1.jar:6.1.1]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:753) ~[spring-boot-3.2.0.jar:3.2.0]
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:455) ~[spring-boot-3.2.0.jar:3.2.0]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:323) ~[spring-boot-3.2.0.jar:3.2.0]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1342) ~[spring-boot-3.2.0.jar:3.2.0]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1331) ~[spring-boot-3.2.0.jar:3.2.0]
    at com.example.springbootopenfeigncompatibility.SpringBootOpenFeignCompatibilityApplication.main(SpringBootOpenFeignCompatibilityApplication.java:12) ~[classes/:na]
Caused by: java.lang.IllegalArgumentException: Invalid value type for attribute 'factoryBeanObjectType': java.lang.String
    at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.getTypeForFactoryBeanFromAttributes(FactoryBeanRegistrySupport.java:86) ~[spring-beans-6.1.1.jar:6.1.1]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.getTypeForFactoryBean(AbstractAutowireCapableBeanFactory.java:838) ~[spring-beans-6.1.1.jar:6.1.1]
    at org.springframework.beans.factory.support.AbstractBeanFactory.isTypeMatch(AbstractBeanFactory.java:620) ~[spring-beans-6.1.1.jar:6.1.1]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doGetBeanNamesForType(DefaultListableBeanFactory.java:573) ~[spring-beans-6.1.1.jar:6.1.1]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanNamesForType(DefaultListableBeanFactory.java:532) ~[spring-beans-6.1.1.jar:6.1.1]
    at org.springframework.boot.autoconfigure.condition.OnBeanCondition.collectBeanNamesForType(OnBeanCondition.java:247) ~[spring-boot-autoconfigure-3.2.0.jar:3.2.0]
    at org.springframework.boot.autoconfigure.condition.OnBeanCondition.getBeanNamesForType(OnBeanCondition.java:240) ~[spring-boot-autoconfigure-3.2.0.jar:3.2.0]
    at org.springframework.boot.autoconfigure.condition.OnBeanCondition.getBeanNamesForType(OnBeanCondition.java:230) ~[spring-boot-autoconfigure-3.2.0.jar:3.2.0]
    at org.springframework.boot.autoconfigure.condition.OnBeanCondition.getMatchingBeans(OnBeanCondition.java:183) ~[spring-boot-autoconfigure-3.2.0.jar:3.2.0]
    at org.springframework.boot.autoconfigure.condition.OnBeanCondition.getMatchOutcome(OnBeanCondition.java:158) ~[spring-boot-autoconfigure-3.2.0.jar:3.2.0]
    at org.springframework.boot.autoconfigure.condition.SpringBootCondition.matches(SpringBootCondition.java:47) ~[spring-boot-autoconfigure-3.2.0.jar:3.2.0]
    ... 16 common frames omitted

Any insights into this error or workarounds would be much appreciated!

Comment From: wilkinsona

To use Spring Boot 3.2 (and therefore Spring Framework 6.1) you need to upgrade Spring Cloud as well. 2023.0.0-RC1 is the latest compatible version of the Spring Cloud release train.