springfox: NPE on startup with spring-cloud Brixton.M3 & @FeignClient

_This issue is linked with that issue https://github.com/spring-cloud/spring-cloud-netflix/issues/672_

On project with springfox 2.2.2 & spring-cloud brixton.M3 (and spring-boot 1.3.0.RELEASE) , an NPE occurs at startup

Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'myFeignClient': FactoryBean threw exception on object creation; nested exception is java.lang.NullPointerException
    at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:175) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.getObjectFromFactoryBean(FactoryBeanRegistrySupport.java:103) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getObjectForBeanInstance(AbstractBeanFactory.java:1585) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:254) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:1192) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1116) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1014) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:545) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    ... 37 common frames omitted
Caused by: java.lang.NullPointerException: null
    at springfox.documentation.schema.property.OptimizedModelPropertiesProvider.beanDescription(OptimizedModelPropertiesProvider.java:317) ~[springfox-schema-2.2.2.jar:2.2.2]
    at springfox.documentation.schema.property.OptimizedModelPropertiesProvider.propertiesFor(OptimizedModelPropertiesProvider.java:117) ~[springfox-schema-2.2.2.jar:2.2.2]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_60]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_60]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_60]
    at java.lang.reflect.Method.invoke(Method.java:497) ~[na:1.8.0_60]
    at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:302) ~[spring-aop-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190) ~[spring-aop-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157) ~[spring-aop-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.aop.aspectj.MethodInvocationProceedingJoinPoint.proceed(MethodInvocationProceedingJoinPoint.java:85) ~[spring-aop-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at springfox.documentation.spring.web.caching.CachingAspect.cachedValue(CachingAspect.java:86) ~[springfox-spring-web-2.2.2.jar:2.2.2]
    at springfox.documentation.spring.web.caching.CachingAspect.operationsAndProperties(CachingAspect.java:69) ~[springfox-spring-web-2.2.2.jar:2.2.2]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_60]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_60]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_60]
    at java.lang.reflect.Method.invoke(Method.java:497) ~[na:1.8.0_60]
    at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:621) ~[spring-aop-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:610) ~[spring-aop-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.aop.aspectj.AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:68) ~[spring-aop-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:168) ~[spring-aop-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92) ~[spring-aop-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) ~[spring-aop-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:208) ~[spring-aop-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at com.sun.proxy.$Proxy167.propertiesFor(Unknown Source) ~[na:na]
    at springfox.documentation.schema.ModelDependencyProvider.propertiesFor(ModelDependencyProvider.java:184) ~[springfox-schema-2.2.2.jar:2.2.2]
    at springfox.documentation.schema.ModelDependencyProvider.nonTrivialProperties(ModelDependencyProvider.java:132) ~[springfox-schema-2.2.2.jar:2.2.2]
    at springfox.documentation.schema.ModelDependencyProvider.resolvedPropertiesAndFields(ModelDependencyProvider.java:121) ~[springfox-schema-2.2.2.jar:2.2.2]
    at springfox.documentation.schema.ModelDependencyProvider.resolvedDependencies(ModelDependencyProvider.java:100) ~[springfox-schema-2.2.2.jar:2.2.2]
    at springfox.documentation.schema.ModelDependencyProvider.resolvedTypeParameters(ModelDependencyProvider.java:110) ~[springfox-schema-2.2.2.jar:2.2.2]
    at springfox.documentation.schema.ModelDependencyProvider.resolvedDependencies(ModelDependencyProvider.java:99) ~[springfox-schema-2.2.2.jar:2.2.2]
    at springfox.documentation.schema.ModelDependencyProvider.dependentModels(ModelDependencyProvider.java:62) ~[springfox-schema-2.2.2.jar:2.2.2]
    at springfox.documentation.schema.ModelDependencyProvider$$FastClassBySpringCGLIB$$ac0d0878.invoke(<generated>) ~[springfox-schema-2.2.2.jar:2.2.2]
    at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204) ~[spring-core-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:718) ~[spring-aop-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157) ~[spring-aop-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.aop.aspectj.MethodInvocationProceedingJoinPoint.proceed(MethodInvocationProceedingJoinPoint.java:85) ~[spring-aop-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at springfox.documentation.spring.web.caching.CachingAspect.cachedValue(CachingAspect.java:86) ~[springfox-spring-web-2.2.2.jar:2.2.2]
    at springfox.documentation.spring.web.caching.CachingAspect.modelsAndDependencies(CachingAspect.java:80) ~[springfox-spring-web-2.2.2.jar:2.2.2]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_60]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_60]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_60]
    at java.lang.reflect.Method.invoke(Method.java:497) ~[na:1.8.0_60]
    at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:621) ~[spring-aop-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:610) ~[spring-aop-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.aop.aspectj.AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:68) ~[spring-aop-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:168) ~[spring-aop-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92) ~[spring-aop-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) ~[spring-aop-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:654) ~[spring-aop-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at springfox.documentation.schema.ModelDependencyProvider$$EnhancerBySpringCGLIB$$b45db8c4.dependentModels(<generated>) ~[springfox-schema-2.2.2.jar:2.2.2]
    at springfox.documentation.schema.DefaultModelProvider.dependencies(DefaultModelProvider.java:113) ~[springfox-schema-2.2.2.jar:2.2.2]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_60]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_60]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_60]
    at java.lang.reflect.Method.invoke(Method.java:497) ~[na:1.8.0_60]
    at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:302) ~[spring-aop-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190) ~[spring-aop-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157) ~[spring-aop-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92) ~[spring-aop-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) ~[spring-aop-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:208) ~[spring-aop-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at com.sun.proxy.$Proxy168.dependencies(Unknown Source) ~[na:na]
    at springfox.documentation.spring.web.scanners.ApiModelReader.populateDependencies(ApiModelReader.java:131) ~[springfox-spring-web-2.2.2.jar:2.2.2]
    at springfox.documentation.spring.web.scanners.ApiModelReader.read(ApiModelReader.java:75) ~[springfox-spring-web-2.2.2.jar:2.2.2]
    at springfox.documentation.spring.web.scanners.ApiListingScanner.scan(ApiListingScanner.java:91) ~[springfox-spring-web-2.2.2.jar:2.2.2]
    at springfox.documentation.spring.web.scanners.ApiDocumentationScanner.scan(ApiDocumentationScanner.java:62) ~[springfox-spring-web-2.2.2.jar:2.2.2]
    at springfox.documentation.spring.web.plugins.DocumentationPluginsBootstrapper.scanDocumentation(DocumentationPluginsBootstrapper.java:101) ~[springfox-spring-web-2.2.2.jar:2.2.2]
    at springfox.documentation.spring.web.plugins.DocumentationPluginsBootstrapper.onApplicationEvent(DocumentationPluginsBootstrapper.java:87) ~[springfox-spring-web-2.2.2.jar:2.2.2]
    at springfox.documentation.spring.web.plugins.DocumentationPluginsBootstrapper.onApplicationEvent(DocumentationPluginsBootstrapper.java:50) ~[springfox-spring-web-2.2.2.jar:2.2.2]
    at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:163) ~[spring-context-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:136) ~[spring-context-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:380) ~[spring-context-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:386) ~[spring-context-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:334) ~[spring-context-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:854) ~[spring-context-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:540) ~[spring-context-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.cloud.netflix.feign.FeignClientFactory.createContext(FeignClientFactory.java:108) ~[spring-cloud-netflix-core-1.1.0.M3.jar:1.1.0.M3]
    at org.springframework.cloud.netflix.feign.FeignClientFactory.getContext(FeignClientFactory.java:75) ~[spring-cloud-netflix-core-1.1.0.M3.jar:1.1.0.M3]
    at org.springframework.cloud.netflix.feign.FeignClientFactory.getInstance(FeignClientFactory.java:113) ~[spring-cloud-netflix-core-1.1.0.M3.jar:1.1.0.M3]
    at org.springframework.cloud.netflix.feign.FeignClientFactoryBean.getOptional(FeignClientFactoryBean.java:120) ~[spring-cloud-netflix-core-1.1.0.M3.jar:1.1.0.M3]
    at org.springframework.cloud.netflix.feign.FeignClientFactoryBean.feign(FeignClientFactoryBean.java:71) ~[spring-cloud-netflix-core-1.1.0.M3.jar:1.1.0.M3]
    at org.springframework.cloud.netflix.feign.FeignClientFactoryBean.getObject(FeignClientFactoryBean.java:143) ~[spring-cloud-netflix-core-1.1.0.M3.jar:1.1.0.M3]
    at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:168) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    ... 45 common frames omitted

A simple example project could be find here : https://github.com/dstackowiak/feignspringfoxexample

I think this is the same problem with : https://github.com/springfox/springfox/issues/784 But here, there is no “multiple WebApplicationInitializers instances”.

A org.springframework.context.support.AbstractApplicationContext.refresh() is call by FeignClientFactory . This refresh() cause the NPE in springfox OptimizedModelPropertiesProvider, ( onApplicationEvent isn’t call in this refresh() spring context )

How could we handle this case?