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26강. Spring Data JPA를 이용해 다양한 쿼리 작성하기

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안녕하세요! 강의 너무 잘 듣고 있습니다.

26강을 따라하던 중, 다음과 같은 에러가 났는데 혼자서 해결이 되지 않아 질문 드립니다.

어떤 코드를 복붙해야할지 모르겠어서 일단 에러메시지만 복사하였습니다!

감사합니다..!!

 

<추가 07.18. 오후 12시>

User.java 에 @Entity 어노테이션이 빠져 있어서 추가를 하니 문제가 해결되었습니다.

문제는 해결되었으나, 에러 메시지 해석이 너무 어려워서 이점만 도움을 주시면 감사하겠습니다!!

2023-07-18 01:41:59.121 ERROR 8616 --- [ main] o.s.boot.SpringApplication : Application run failed

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userController' defined in file [C:\Users\1876007\Desktop\study\library-app\build\classes\java\main\com\group\libraryapp\controller\user\UserController.class]: Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userServiceV2' defined in file [C:\Users\1876007\Desktop\study\library-app\build\classes\java\main\com\group\libraryapp\service\UserServiceV2.class]: Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userRepository' defined in com.group.libraryapp.domain.user.UserRepository defined in @EnableJpaRepositories declared on JpaRepositoriesRegistrar.EnableJpaRepositoriesConfiguration: Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Not a managed type: class com.group.libraryapp.domain.user.User

at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:800) ~[spring-beans-5.3.24.jar:5.3.24]

at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:229) ~[spring-beans-5.3.24.jar:5.3.24]

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1372) ~[spring-beans-5.3.24.jar:5.3.24]

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1222) ~[spring-beans-5.3.24.jar:5.3.24]

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:582) ~[spring-beans-5.3.24.jar:5.3.24]

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542) ~[spring-beans-5.3.24.jar:5.3.24]

at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) ~[spring-beans-5.3.24.jar:5.3.24]

at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.24.jar:5.3.24]

at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.24.jar:5.3.24]

at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.24.jar:5.3.24]

at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:955) ~[spring-beans-5.3.24.jar:5.3.24]

at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:918) ~[spring-context-5.3.24.jar:5.3.24]

at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:583) ~[spring-context-5.3.24.jar:5.3.24]

at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:147) ~[spring-boot-2.7.6.jar:2.7.6]

at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:731) ~[spring-boot-2.7.6.jar:2.7.6]

at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:408) ~[spring-boot-2.7.6.jar:2.7.6]

at org.springframework.boot.SpringApplication.run(SpringApplication.java:307) ~[spring-boot-2.7.6.jar:2.7.6]

at org.springframework.boot.SpringApplication.run(SpringApplication.java:1303) ~[spring-boot-2.7.6.jar:2.7.6]

at org.springframework.boot.SpringApplication.run(SpringApplication.java:1292) ~[spring-boot-2.7.6.jar:2.7.6]

at com.group.libraryapp.LibraryAppApplication.main(LibraryAppApplication.java:10) ~[main/:na]

Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userServiceV2' defined in file [C:\Users\1876007\Desktop\study\library-app\build\classes\java\main\com\group\libraryapp\service\UserServiceV2.class]: Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userRepository' defined in com.group.libraryapp.domain.user.UserRepository defined in @EnableJpaRepositories declared on JpaRepositoriesRegistrar.EnableJpaRepositoriesConfiguration: Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Not a managed type: class com.group.libraryapp.domain.user.User

at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:800) ~[spring-beans-5.3.24.jar:5.3.24]

at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:229) ~[spring-beans-5.3.24.jar:5.3.24]

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1372) ~[spring-beans-5.3.24.jar:5.3.24]

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1222) ~[spring-beans-5.3.24.jar:5.3.24]

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:582) ~[spring-beans-5.3.24.jar:5.3.24]

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542) ~[spring-beans-5.3.24.jar:5.3.24]

at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) ~[spring-beans-5.3.24.jar:5.3.24]

at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.24.jar:5.3.24]

at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.24.jar:5.3.24]

at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.24.jar:5.3.24]

at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276) ~[spring-beans-5.3.24.jar:5.3.24]

at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1391) ~[spring-beans-5.3.24.jar:5.3.24]

at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1311) ~[spring-beans-5.3.24.jar:5.3.24]

at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:887) ~[spring-beans-5.3.24.jar:5.3.24]

at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:791) ~[spring-beans-5.3.24.jar:5.3.24]

... 19 common frames omitted

Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userRepository' defined in com.group.libraryapp.domain.user.UserRepository defined in @EnableJpaRepositories declared on JpaRepositoriesRegistrar.EnableJpaRepositoriesConfiguration: Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Not a managed type: class com.group.libraryapp.domain.user.User

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1804) ~[spring-beans-5.3.24.jar:5.3.24]

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:620) ~[spring-beans-5.3.24.jar:5.3.24]

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542) ~[spring-beans-5.3.24.jar:5.3.24]

at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) ~[spring-beans-5.3.24.jar:5.3.24]

at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.24.jar:5.3.24]

at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.24.jar:5.3.24]

at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.24.jar:5.3.24]

at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276) ~[spring-beans-5.3.24.jar:5.3.24]

at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1391) ~[spring-beans-5.3.24.jar:5.3.24]

at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1311) ~[spring-beans-5.3.24.jar:5.3.24]

at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:887) ~[spring-beans-5.3.24.jar:5.3.24]

at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:791) ~[spring-beans-5.3.24.jar:5.3.24]

... 33 common frames omitted

Caused by: java.lang.IllegalArgumentException: Not a managed type: class com.group.libraryapp.domain.user.User

at org.hibernate.metamodel.internal.MetamodelImpl.managedType(MetamodelImpl.java:583) ~[hibernate-core-5.6.14.Final.jar:5.6.14.Final]

at org.hibernate.metamodel.internal.MetamodelImpl.managedType(MetamodelImpl.java:85) ~[hibernate-core-5.6.14.Final.jar:5.6.14.Final]

at org.springframework.data.jpa.repository.support.JpaMetamodelEntityInformation.<init>(JpaMetamodelEntityInformation.java:75) ~[spring-data-jpa-2.7.6.jar:2.7.6]

at org.springframework.data.jpa.repository.support.JpaEntityInformationSupport.getEntityInformation(JpaEntityInformationSupport.java:66) ~[spring-data-jpa-2.7.6.jar:2.7.6]

at org.springframework.data.jpa.repository.support.JpaRepositoryFactory.getEntityInformation(JpaRepositoryFactory.java:233) ~[spring-data-jpa-2.7.6.jar:2.7.6]

at org.springframework.data.jpa.repository.support.JpaRepositoryFactory.getTargetRepository(JpaRepositoryFactory.java:182) ~[spring-data-jpa-2.7.6.jar:2.7.6]

at org.springframework.data.jpa.repository.support.JpaRepositoryFactory.getTargetRepository(JpaRepositoryFactory.java:165) ~[spring-data-jpa-2.7.6.jar:2.7.6]

at org.springframework.data.jpa.repository.support.JpaRepositoryFactory.getTargetRepository(JpaRepositoryFactory.java:76) ~[spring-data-jpa-2.7.6.jar:2.7.6]

at org.springframework.data.repository.core.support.RepositoryFactorySupport.getRepository(RepositoryFactorySupport.java:325) ~[spring-data-commons-2.7.6.jar:2.7.6]

at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.lambda$afterPropertiesSet$5(RepositoryFactoryBeanSupport.java:323) ~[spring-data-commons-2.7.6.jar:2.7.6]

at org.springframework.data.util.Lazy.getNullable(Lazy.java:231) ~[spring-data-commons-2.7.6.jar:2.7.6]

at org.springframework.data.util.Lazy.get(Lazy.java:115) ~[spring-data-commons-2.7.6.jar:2.7.6]

at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.afterPropertiesSet(RepositoryFactoryBeanSupport.java:329) ~[spring-data-commons-2.7.6.jar:2.7.6]

at org.springframework.data.jpa.repository.support.JpaRepositoryFactoryBean.afterPropertiesSet(JpaRepositoryFactoryBean.java:144) ~[spring-data-jpa-2.7.6.jar:2.7.6]

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1863) ~[spring-beans-5.3.24.jar:5.3.24]

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1800) ~[spring-beans-5.3.24.jar:5.3.24]

... 44 common frames omitted

Process finished with exit code 1

 

javaspringawsmysqlspring-bootjpa

답변 1

0

최태현님의 프로필 이미지
최태현
지식공유자

안녕하세요, tls021121님! 질문 올려주셔서 감사드립니다! 😊

크으~~ 잘 해결하셨군요!! 👍👍 말씀해 주신 것처럼 에러 (stack trace)를 조금 더 잘 보는 법만 공유드려 보도록 하겠습니다.

서버에서 에러가 발생하면, 굉장히 길고~ 긴 에러 로그가 남게 됩니다. 이 에러로그는 한 줄 한 줄이 코드가 실행되었던 함수라고 생각하시면 되어요!

예를 들어,

public void a() {
  b();
}

public void b() {
  c();
}

public void c() {
  // 에러 발생
}

위 코드와 같이 a -> b -> c 호출이 이뤄진다면 에러에서는 다음과 같이 보이게 됩니다.

에러 발생 + 에러 메시지
at 패키지.클래스.c(c 함수 위치)
at 패키지.클래스.b(b함수 위치)
at 패캐지.클래스.a(a함수 위치)

 

자 그리고~ 언젠가는 이 한 줄 한 줄을 살펴봐야 할 때도 있겠지만, 대부분의 경우는 우리가 작성한 코드를 위주로 확인하면 됩니다. 예를 들어, 저희 코드는 com.group 패키지 안에 있는데요! 이 길고 긴 에러에서 com.group 으로 검색을 해보는거에요! 그럼 아래 코드 정도만 남습니다. (내용이 중복이라 가장 긴 코드는 제외 했어요!!)

  • Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userServiceV2' defined in file [C:\Users\1876007\Desktop\study\library-app\build\classes\java\main\com\group\libraryapp\service\UserServiceV2.class]: Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userRepository' defined in com.group.libraryapp.domain.user.UserRepository defined in @EnableJpaRepositories declared on JpaRepositoriesRegistrar.EnableJpaRepositoriesConfiguration: Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Not a managed type: class com.group.libraryapp.domain.user.User

  • Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userRepository' defined in com.group.libraryapp.domain.user.UserRepository defined in @EnableJpaRepositories declared on JpaRepositoriesRegistrar.EnableJpaRepositoriesConfiguration: Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Not a managed type: class com.group.libraryapp.domain.user.User

  • Caused by: java.lang.IllegalArgumentException: Not a managed type: class com.group.libraryapp.domain.user.User

이렇게 com.group 으로 검색을 하고~ 가장 먼저 제일 아래에 있는 에러를 확인해보시면 됩니다.

보통 아래에 있을 수록 근본 원인이기 때문에요 예를 들어, 현재 위 내용을 해석해보면

  1. User가 managed type이 아니기 때문에

  2. UserRepository에서 문제가 생겼고

  3. UserRepository에서 문제가 생겨서, UserSerivceV2에서 문제가 생겼다

라고 할 수 있습니다.

 

따라서, 근본 원인은 가장 아래 있는 Not a managed type: class com.group.libraryapp.domain.user.User 인 거죠!!

구글에 검색 하실 때도 Not a managed type JPA 에러 라고 검색하시면 제일 빨리 찾으실 수 있을 겁니다.

잘 해결하셨듯이 not a managed type JPA는 해당 객체가 @Entity 가 붙어 있지 않아 JPA가 관리하고 있지 않다라는 뜻이에요 ㅎㅎㅎ

 

이 과정이 익숙해지면

  • 에러 나오면 -> 주요 메시지만 바로~ 필터링 해서 -> 원인 바로~ 보고 -> 아 managed type 문제 -> @Entity가 빠졌네 혹은 (처음 보는 에러면 검색)

라고 금방 생각하시게 될겁니다.

 

답변이 도움이 되었으면 좋겠습니다. 감사합니다! 🙏🙏🙏

tls021121님의 프로필 이미지
tls021121

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