SpringBoot 3.4.0 Error creating bean with name 'openApiResource'

[fangzhengjin]

Describe the bug

SpringBoot: 3.4.0
SpringDoc: 2.7.0

Application cannot be start

To Reproduce

springdoc:
  enable-default-api-docs: true

Additional context

2024-12-18 14:48:45.153 [SW_CTX: N/A] [pool-2-thread-1] INFO  o.s.b.f.s.DefaultListableBeanFactory -Creating singleton bean 'openApiResource' in thread "pool-2-thread-1" while other thread holds singleton lock for other beans [openApiResource]
Exception in thread "pool-2-thread-1" org.springframework.beans.factory.BeanCurrentlyInCreationException: Error creating bean with name 'openApiResource': Requested bean is currently in creation: Is there an unresolvable circular reference or an asynchronous initialization dependency?
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.beforeSingletonCreation(DefaultSingletonBeanRegistry.java:420)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:281)
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:334)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeansWithAnnotation(DefaultListableBeanFactory.java:743)
	at org.springframework.context.support.AbstractApplicationContext.getBeansWithAnnotation(AbstractApplicationContext.java:1440)
	at org.springdoc.core.service.OpenAPIService.build(OpenAPIService.java:269)
	at org.springdoc.api.AbstractOpenApiResource.getOpenApi(AbstractOpenApiResource.java:352)
	at org.springdoc.api.AbstractOpenApiResource.lambda$new$0(AbstractOpenApiResource.java:258)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)
	at java.base/java.lang.Thread.run(Thread.java:1583)

[fangzhengjin]

Through analysis, the problem should be here https://github.com/springdoc/springdoc-openapi/blob/main/springdoc-openapi-starter-common/src/main/java/org/springdoc/core/service/OpenAPIService.java#L269

1. context.getBeansWithAnnotation(RestController.class) Need to obtain org.springdoc.webmvc.api.OpenApiWebMvcResource
2. org.springdoc.webmvc.api.OpenApiWebMvcResource Need to inject OpenAPIService

It is possible that it is related to the loading logic of the new version of Springboot，Add a breakpoint at context.getBeansWithAnnotation(RestController.class), release it after a while, and everything loads normally.

[bnasslahsen]

@fangzhengjin,

Not reproducible.
Feel free to provide a Minimal, Reproducible Example - with HelloController that reproduces the problem.

This ticket will be closed, but can be reopened if your provide the reproducible sample.

[fangzhengjin]

@bnasslahsen

SpringBoot: 3.4.3
SpringDoc: 2.8.5

This problem may not be reproduced in the smallest sample project, but in a system with more code, this problem occurs and I extracted the exception stack for this problem.

When there are many automatic configurations, it may interfere with the registration order of springdoc-related beans, resulting in this problem.

org.springframework.beans.factory.BeanCurrentlyInCreationException: Error creating bean with name 'openApiResource': Requested bean is currently in creation: Is there an unresolvable circular reference or an asynchronous initialization dependency?
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.beforeSingletonCreation(DefaultSingletonBeanRegistry.java:488)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:303)
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:337)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeansWithAnnotation(DefaultListableBeanFactory.java:769)
	at org.springframework.context.support.AbstractApplicationContext.getBeansWithAnnotation(AbstractApplicationContext.java:1440)
	at org.springdoc.core.service.OpenAPIService.build(OpenAPIService.java:269)
	at org.springdoc.api.AbstractOpenApiResource.getOpenApi(AbstractOpenApiResource.java:352)
	at org.springdoc.api.AbstractOpenApiResource.<init>(AbstractOpenApiResource.java:258)
	at org.springdoc.webmvc.api.OpenApiResource.<init>(OpenApiResource.java:111)
	at org.springdoc.webmvc.api.OpenApiWebMvcResource.<init>(OpenApiWebMvcResource.java:100)
	at org.springdoc.webmvc.core.configuration.SpringDocWebMvcConfiguration.openApiResource(SpringDocWebMvcConfiguration.java:114)
	at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
	at java.base/java.lang.reflect.Method.invoke(Method.java:580)
	at org.springframework.beans.factory.support.SimpleInstantiationStrategy.lambda$instantiate$0(SimpleInstantiationStrategy.java:171)
	at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiateWithFactoryMethod(SimpleInstantiationStrategy.java:88)
	at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:168)
	at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:653)
	at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:645)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1361)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1191)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:563)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:523)
	at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(A

I tried rewriting AbstractOpenApiResource to set getOpenApi to public and configured it using ApplicationReadyEvent in the project's configuration class, and he did it quickly without any errors.

@EventListener
public void onApplicationEvent(ApplicationReadyEvent event) {
    if (springDocConfigProperties.isPreLoadingEnabled()) {
        if (CollectionUtils.isEmpty(springDocConfigProperties.getPreLoadingLocales())) {
            Executors.newSingleThreadExecutor().execute(abstractOpenApiResource::getOpenApi);
        }
        else {
            for (String locale : springDocConfigProperties.getPreLoadingLocales()) {
                Executors.newSingleThreadExecutor().execute(() -> abstractOpenApiResource.getOpenApi(Locale.forLanguageTag(locale)));
            }
        }
    }
}

Using ApplicationReadyEvent in AbstractOpenApiResource causes the same problem.