[스프링부트] 1.3.0: spring-boot-devtools 사용시 ModelMapper에서 Caused by: java.lang.ClassCastException 발생

[스프링부트] 1.3.0: spring-boot-devtools 사용시 ModelMapper에서

스프링부트 1.3.0 에서 가장 주목할만한 기능중 하나로 개발도구dev-tools 의 추가를 들 수가 있다. 반응형 프로그래밍reactive programming 의 개념을 도입하여 개발중에 소스코드의 변경이 발생할 경우 변경사항이 구동중인 앱에 반영되는 기능이다.

1.3.0 버전 전에는 classloader를 이용해서 그런 기능을 대신하고 있었다.

스프링부트의 devtools 는 똑같은 두개의 앱을 띄워서 변경사항이 발생하면 컴파일을 하고 그 변경사항을 적용한 앱으로 교체해주는 기작이라고 보면 된다. 그런데 스프링부트의 이런 기능이 ModelMapper의 동작방식과 충돌을 일으킨다. 스프링에서 빈으로 등록한 ModelMapper가 뒤에 있는 앱에 빌드가 되어 재적재reload를 수행하려고 할 때 결함이 발생하며 앱이 죽어버리는 문제가 생긴다.

dev-tools를 사용하지 않던가 모델매퍼modelMapper를 사용하지 않던가 둘 중에 하나를 선택해야 한다.

ㅡ_-);; DTO 객체 정보를 엔티티에 매핑하기 귀찮아서 사용했었는데 여기서 발목을 잡힐 줄이야...

다음 프로젝트에서는 모델매퍼를 사용하지 않을 계획이기는 하지만...

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'messageServiceImpl': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private org.modelmapper.ModelMapper io.honeymon.message.MessageServiceImpl.modelMapper; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'modelMapper' defined in class path resource [io/honeymon/configuration/WebConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.modelmapper.ModelMapper]: Factory method 'modelMapper' threw exception; nested exception is org.modelmapper.ConfigurationException: ModelMapper configuration errors:

1) Failed to configure mappings

1 error at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:334) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1214) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:543) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[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.preInstantiateSingletons(DefaultListableBeanFactory.java:772) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:838) ~[spring-context-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:537) ~[spring-context-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:118) ~[spring-boot-1.3.0.RELEASE.jar:1.3.0.RELEASE] at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:752) [spring-boot-1.3.0.RELEASE.jar:1.3.0.RELEASE] at org.springframework.boot.SpringApplication.doRun(SpringApplication.java:347) [spring-boot-1.3.0.RELEASE.jar:1.3.0.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:295) [spring-boot-1.3.0.RELEASE.jar:1.3.0.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1112) [spring-boot-1.3.0.RELEASE.jar:1.3.0.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1101) [spring-boot-1.3.0.RELEASE.jar:1.3.0.RELEASE] at io.honeymon.Application.main(Application.java:34) [bin/:na] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_25] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_25] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_25] at java.lang.reflect.Method.invoke(Method.java:483) ~[na:1.8.0_25] at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) [spring-boot-devtools-1.3.0.RELEASE.jar:1.3.0.RELEASE] Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private org.modelmapper.ModelMapper io.honeymon.message.MessageServiceImpl.modelMapper; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'modelMapper' defined in class path resource [io/honeymon/configuration/WebConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.modelmapper.ModelMapper]: Factory method 'modelMapper' threw exception; nested exception is org.modelmapper.ConfigurationException: ModelMapper configuration errors:

1) Failed to configure mappings

1 error at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:573) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:331) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE] ... 22 common frames omitted Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'modelMapper' defined in class path resource [io/honeymon/configuration/WebConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.modelmapper.ModelMapper]: Factory method 'modelMapper' threw exception; nested exception is org.modelmapper.ConfigurationException: ModelMapper configuration errors:

1) Failed to configure mappings

1 error at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:599) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1123) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1018) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:510) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:1192) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1116) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1014) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:545) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE] ... 24 common frames omitted Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.modelmapper.ModelMapper]: Factory method 'modelMapper' threw exception; nested exception is org.modelmapper.ConfigurationException: ModelMapper configuration errors:

1) Failed to configure mappings

1 error at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:189) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:588) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE] ... 36 common frames omitted Caused by: org.modelmapper.ConfigurationException: ModelMapper configuration errors:

1) Failed to configure mappings

1 error at org.modelmapper.internal.Errors.throwConfigurationExceptionIfErrorsExist(Errors.java:241) ~[modelmapper-0.7.5.jar:na] at org.modelmapper.internal.ExplicitMappingBuilder.build(ExplicitMappingBuilder.java:207) ~[modelmapper-0.7.5.jar:na] at org.modelmapper.internal.TypeMapImpl.addMappings(TypeMapImpl.java:72) ~[modelmapper-0.7.5.jar:na] at org.modelmapper.internal.TypeMapStore.getOrCreate(TypeMapStore.java:101) ~[modelmapper-0.7.5.jar:na] at org.modelmapper.ModelMapper.addMappings(ModelMapper.java:93) ~[modelmapper-0.7.5.jar:na] at io.honeymon.configuration.WebConfiguration.modelMapper(WebConfiguration.java:228) ~[bin/:na] at io.honeymon.configuration.WebConfiguration$$EnhancerBySpringCGLIB$$27012ff3.CGLIB$modelMapper$11() ~[bin/:na] at io.honeymon.configuration.WebConfiguration$$EnhancerBySpringCGLIB$$27012ff3$$FastClassBySpringCGLIB$$a53168eb.invoke() ~[bin/:na] at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228) ~[spring-core-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:318) ~[spring-context-4.2.3.RELEASE.jar:4.2.3.RELEASE] at io.honeymon.configuration.WebConfiguration$$EnhancerBySpringCGLIB$$27012ff3.modelMapper() ~[bin/:na] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_25] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_25] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_25] at java.lang.reflect.Method.invoke(Method.java:483) ~[na:1.8.0_25] at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:162) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE] ... 37 common frames omitted

Caused by: java.lang.ClassCastException: io.honeymon.agent.Agent$$EnhancerByModelMapper$$3d7a6a28 cannot be cast to io.honeymon.agent.Agent at io.honeymon.common.mapper.AgentDtoToAgentPropertyMap.configure(AgentDtoToAgentPropertyMap.java:25) ~[bin/:na] at org.modelmapper.PropertyMap.configure(PropertyMap.java:383) ~[modelmapper-0.7.5.jar:na] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_25] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_25] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_25] at java.lang.reflect.Method.invoke(Method.java:483) ~[na:1.8.0_25] at org.modelmapper.internal.ExplicitMappingBuilder.build(ExplicitMappingBuilder.java:195) ~[modelmapper-0.7.5.jar:na] ... 51 common frames omitted

참고사항

• ClassCastException in ModelMapper: EnhancerByModelMapper cannot be cast

  SpringBoot의 dev-tools도 앱을 reload 하기 위해 빈을 등록하는 과정에서 ModelMapper 빈을 등록하는 과정에서 앞서 등록된 propertyMap과 충돌을 일으킨다. ModelMapper의 propertyMap 관리부분이 캐시로 등록되어 있어서 중복선언되면서 충돌하는 부분이랄까...? dev-tools 를 사용하지 않으면 문제 없음