강사님, 강의 내용에는 코루틴이 없어 학습중에 궁금한 점이 있어서 문의드립니다. 아래 코드의 실행 순서를 제가 정리 해봤습니다. 제가 코루틴의 suspend, resume을 잘 이해한게 맞나 궁금해서요. 물어볼 곳이 없어서, 죄송스럽게도 강사님께 문의를 하게 되었습니다. 강의 내용과는 관련이 없어 답변을 해주시면 감사하겠지만, 답변이 안달리다도 괜찮습니다. 감사합니다. println("Coroutine Outer") 이 실행된다. A 코루틴에서 delay를 만나, B 코루틴으로 실행권을 넘겨간다. B 코루틴도 delay를 만나, A 코루틴으로 실행권을 넘겨준다. 1초가 지나고 A코루틴의 println("Coroutine A, Si")을 실행한다. 반복문에 의하여 A코루틴의 2번째 delay를 만나, 다시 B 코루틴으로 실행권을 넘겨준다. B 코루틴도 1초가 지난 상태여서, 바로 println("Coroutine B, Si")을 실행한다. 반복문에 의하여 B코루틴의 2번째 delay를 만나, 다시 A 코루틴으로 실행권을 넘겨준다. 그 다음 4~7을 반복문이 끝날 때 까지 반복 후 코루틴이 종료된다. fun main() = runBlocking { // A 코루틴 launch { repeat(5) { i -> delay(1000L) println("Coroutine A") } } // B 코루틴 launch { repeat(5) { i -> delay(1000L) println("Coroutine B") } } println("Coroutine Outer") } fun <T> println(msg: T) { kotlin.io.println("$msg [${Thread.currentThread().name}]") }
쿠키랑 세션이랑 다른거잖아요 둘다 인증에 사용되는 작은 저장소같은거예요 저는 둘이 다르다고해서 어떤로그인에는 전과정에 쿠키만 쓰이고 어떤과정에는 전과정에 세션만쓰이고 이런건줄알았는데 이 그림을 보니 로그인이라는건 세션+쿠키가 둘다쓰이는 작업인거네요..? 로그인을 하면 항상 sessionid를 발급해줘야하니까 세션이 쓰이고 클라이언트 측에서는 그정보를 저장하고있어야하니 sessionid를 담은 쿠키가 생성되는거구요. 제 말이 맞나요? https://sjparkk-dev1og.tistory.com/1 2. 쿠키정보는 항상 서버에 전송되기때문에 네트워크 트래픽이 유발돼요 근데 쿠키는 웹브라우저에 있는 작은저장소예요 이말은 곧 서버의 자원을 활용하지 않는다는얘기죠 근데 서버에 항상 전송돼서 네트워크 트래픽을 유발하는게 서버의 자원을 쓰는것과 다른얘기인가요? 자꾸 요청이 오면 그거 처리하느라 자원을 써야하는거아닌가요?
안녕하세요 강사님 레코드 캡슐화 설명을 들으면서 궁금한 점이 생겨 질문 드립니다. 강의에서, 퍼블릭 필드를 감추는 용도로 퍼블릭 메서드를 사용할 수 있는데, 그 이유로는 퍼블릭 필드(ex, String name) 와 퍼블릭 메서드(ex, String setLastName()) 의 이름이 완전히 동일하다는 보장이 없기 때문입니다. 위 문장을, 퍼블릭 메서드는 퍼블릭 필드를 감추는 용도로 사용할 수 있다고 이해했습니다. 궁금한 점은, 그렇다면 필드를 감추는 것이 중요한 이유는 클라이언트단에서 데이터 클래스의 필드에 무작위적인 접근을 방지하기 위함인가요? 무작위적인 필드의 접근은 데이터를 쉽게 수정할 수 있게 때문이라고 추측했습니다. 감사합니다.
JPA와 DB 설정, 동작확인의 테스트코드를 실행하는 중 오류가 나서 질문 드립니다. 가끔 jpashop.mv .db를 삭제 후 처음부터 생성을 다시하면 첫 테스트 실행시에는 에러가 나지 않을때가 있으나, 두번째 실행부터는 같은 오류가 다시 반복됩니다. Rollback(false)를 사용하지 않아도 콘솔창에서 롤백한다는 메시지도 나오지 않았습니다. MVCC=true 부분도 삭제해봤고, application.yml이랑 build.gradle도 여러번 확인했습니다. MemberRepository 입니다. Member 클래스 입니다. 오류가 나는 테스트코드 입니다. 처음 생성시 Junit4로 만들었습니다. application.yml 입니다. build.gradle 입니다. h2는 실행중이며, 1.4.200 버전 입니다. 강의자료에서 해당 버전 사용하라고 명시되어 있어 다른 버전으로는 사용해보지 않았습니다. 아래는 오류 전문입니다. Error starting ApplicationContext. To display the condition evaluation report re-run your application with 'debug' enabled. 2023-01-25T20:44:53.061+09:00 ERROR 21512 --- [ Test worker] o.s.boot.SpringApplication : Application run failed org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaConfiguration.class]: [PersistenceUnit: default] Unable to build Hibernate SessionFactory; nested exception is org.hibernate.MappingException: Could not instantiate id generator [entity-name=jpabook.jpashop.Member] at org.springframework.beans.factory.support .AbstractAutowireCapableBeanFactory.initializeBean( AbstractAutowireCapableBeanFactory.java:1751 ) ~[spring-beans-6.0.4.jar:6.0.4] at org.springframework.beans.factory.support .AbstractAutowireCapableBeanFactory.doCreateBean( AbstractAutowireCapableBeanFactory.java:599 ) ~[spring-beans-6.0.4.jar:6.0.4] at org.springframework.beans.factory.support .AbstractAutowireCapableBeanFactory.createBean( AbstractAutowireCapableBeanFactory.java:521 ) ~[spring-beans-6.0.4.jar:6.0.4] at org.springframework.beans.factory.support .AbstractBeanFactory.lambda$doGetBean$0( AbstractBeanFactory.java:326 ) ~[spring-beans-6.0.4.jar:6.0.4] at org.springframework.beans.factory.support .DefaultSingletonBeanRegistry.getSingleton( DefaultSingletonBeanRegistry.java:234 ) ~[spring-beans-6.0.4.jar:6.0.4] at org.springframework.beans.factory.support .AbstractBeanFactory.doGetBean( AbstractBeanFactory.java:324 ) ~[spring-beans-6.0.4.jar:6.0.4] at org.springframework.beans.factory.support .AbstractBeanFactory.getBean( AbstractBeanFactory.java:200 ) ~[spring-beans-6.0.4.jar:6.0.4] at org.springframework.context.support .AbstractApplicationContext.getBean( AbstractApplicationContext.java:1130 ) ~[spring-context-6.0.4.jar:6.0.4] at org.springframework.context.support .AbstractApplicationContext.finishBeanFactoryInitialization( AbstractApplicationContext.java:905 ) ~[spring-context-6.0.4.jar:6.0.4] at org.springframework.context.support .AbstractApplicationContext.refresh( AbstractApplicationContext.java:584 ) ~[spring-context-6.0.4.jar:6.0.4] at org.springframework.boot.SpringApplication.refresh( SpringApplication.java:730 ) ~[spring-boot-3.0.2.jar:3.0.2] at org.springframework.boot.SpringApplication.refreshContext( SpringApplication.java:432 ) ~[spring-boot-3.0.2.jar:3.0.2] at org.springframework.boot.SpringApplication.run ( SpringApplication.java:308 ) ~[spring-boot-3.0.2.jar:3.0.2] at org.springframework.boot.test.context.SpringBootContextLoader.lambda$loadContext$3( SpringBootContextLoader.java:137 ) ~[spring-boot-test-3.0.2.jar:3.0.2] at org.springframework.util.function.ThrowingSupplier.get( ThrowingSupplier.java:59 ) ~[spring-core-6.0.4.jar:6.0.4] at org.springframework.util.function.ThrowingSupplier.get( ThrowingSupplier.java:47 ) ~[spring-core-6.0.4.jar:6.0.4] at org.springframework.boot.SpringApplication.withHook( SpringApplication.java:1386 ) ~[spring-boot-3.0.2.jar:3.0.2] at org.springframework.boot.test.context.SpringBootContextLoader$ContextLoaderHook.run( SpringBootContextLoader.java:543 ) ~[spring-boot-test-3.0.2.jar:3.0.2] at org.springframework.boot.test.context.SpringBootContextLoader.loadContext( SpringBootContextLoader.java:137 ) ~[spring-boot-test-3.0.2.jar:3.0.2] at org.springframework.boot.test.context.SpringBootContextLoader.loadContext( SpringBootContextLoader.java:108 ) ~[spring-boot-test-3.0.2.jar:3.0.2] at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContextInternal( DefaultCacheAwareContextLoaderDelegate.java:184 ) ~[spring-test-6.0.4.jar:6.0.4] at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext( DefaultCacheAwareContextLoaderDelegate.java:118 ) ~[spring-test-6.0.4.jar:6.0.4] at org.springframework.test.context.support .DefaultTestContext.getApplicationContext( DefaultTestContext.java:127 ) ~[spring-test-6.0.4.jar:6.0.4] at org.springframework.test.context.web.ServletTestExecutionListener.setUpRequestContextIfNecessary( ServletTestExecutionListener.java:191 ) ~[spring-test-6.0.4.jar:6.0.4] at org.springframework.test.context.web.ServletTestExecutionListener.prepareTestInstance( ServletTestExecutionListener.java:130 ) ~[spring-test-6.0.4.jar:6.0.4] at org.springframework.test.context.TestContextManager.prepareTestInstance( TestContextManager.java:241 ) ~[spring-test-6.0.4.jar:6.0.4] at org.springframework.test.context.junit.jupiter.SpringExtension.postProcessTestInstance( SpringExtension.java:138 ) ~[spring-test-6.0.4.jar:6.0.4] at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$invokeTestInstancePostProcessors$10( ClassBasedTestDescriptor.java:377 ) ~[junit-jupiter-engine-5.9.2.jar:5.9.2] at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.executeAndMaskThrowable( ClassBasedTestDescriptor.java:382 ) ~[junit-jupiter-engine-5.9.2.jar:5.9.2] at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$invokeTestInstancePostProcessors$11( ClassBasedTestDescriptor.java:377 ) ~[junit-jupiter-engine-5.9.2.jar:5.9.2] at java.base/java.util.stream.ReferencePipeline$3$1.accept( ReferencePipeline.java:197 ) ~[na:na] at java.base/java.util.stream.ReferencePipeline$2$1.accept( ReferencePipeline.java:179 ) ~[na:na] at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining( ArrayList.java:1625 ) ~[na:na] at java.base/java.util.stream.AbstractPipeline.copyInto( AbstractPipeline.java:509 ) ~[na:na] at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto( AbstractPipeline.java:499 ) ~[na:na] at java.base/java.util.stream.StreamSpliterators$WrappingSpliterator.forEachRemaining( StreamSpliterators.java:310 ) ~[na:na] at java.base/java.util.stream.Streams$ConcatSpliterator.forEachRemaining( Streams.java:735 ) ~[na:na] at java.base/java.util.stream.Streams$ConcatSpliterator.forEachRemaining( Streams.java:734 ) ~[na:na] at java.base/java.util.stream.ReferencePipeline$Head.forEach( ReferencePipeline.java:762 ) ~[na:na] at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.invokeTestInstancePostProcessors( ClassBasedTestDescriptor.java:376 ) ~[junit-jupiter-engine-5.9.2.jar:5.9.2] at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$instantiateAndPostProcessTestInstance$6( ClassBasedTestDescriptor.java:289 ) ~[junit-jupiter-engine-5.9.2.jar:5.9.2] at org.junit.platform.engine.support .hierarchical.ThrowableCollector.execute( ThrowableCollector.java:73 ) ~[junit-platform-engine-1.9.2.jar:1.9.2] at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.instantiateAndPostProcessTestInstance( ClassBasedTestDescriptor.java:288 ) ~[junit-jupiter-engine-5.9.2.jar:5.9.2] at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$testInstancesProvider$4( ClassBasedTestDescriptor.java:278 ) ~[junit-jupiter-engine-5.9.2.jar:5.9.2] at java.base/java.util.Optional.orElseGet( Optional.java:364 ) ~[na:na] at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$testInstancesProvider$5( ClassBasedTestDescriptor.java:277 ) ~[junit-jupiter-engine-5.9.2.jar:5.9.2] at org.junit.jupiter.engine.execution.TestInstancesProvider.getTestInstances( TestInstancesProvider.java:31 ) ~[junit-jupiter-engine-5.9.2.jar:5.9.2] at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$prepare$0( TestMethodTestDescriptor.java:105 ) ~[junit-jupiter-engine-5.9.2.jar:5.9.2] at org.junit.platform.engine.support .hierarchical.ThrowableCollector.execute( ThrowableCollector.java:73 ) ~[junit-platform-engine-1.9.2.jar:1.9.2] at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.prepare( TestMethodTestDescriptor.java:104 ) ~[junit-jupiter-engine-5.9.2.jar:5.9.2] at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.prepare( TestMethodTestDescriptor.java:68 ) ~[junit-jupiter-engine-5.9.2.jar:5.9.2] at org.junit.platform.engine.support .hierarchical.NodeTestTask.lambda$prepare$2( NodeTestTask.java:123 ) ~[junit-platform-engine-1.9.2.jar:1.9.2] at org.junit.platform.engine.support .hierarchical.ThrowableCollector.execute( ThrowableCollector.java:73 ) ~[junit-platform-engine-1.9.2.jar:1.9.2] at org.junit.platform.engine.support .hierarchical.NodeTestTask.prepare( NodeTestTask.java:123 ) ~[junit-platform-engine-1.9.2.jar:1.9.2] at org.junit.platform.engine.support .hierarchical.NodeTestTask.execute( NodeTestTask.java:90 ) ~[junit-platform-engine-1.9.2.jar:1.9.2] at java.base/java.util.ArrayList.forEach( ArrayList.java:1511 ) ~[na:na] at org.junit.platform.engine.support .hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll( SameThreadHierarchicalTestExecutorService.java:41 ) ~[junit-platform-engine-1.9.2.jar:1.9.2] at org.junit.platform.engine.support .hierarchical.NodeTestTask.lambda$executeRecursively$6( NodeTestTask.java:155 ) ~[junit-platform-engine-1.9.2.jar:1.9.2] at org.junit.platform.engine.support .hierarchical.ThrowableCollector.execute( ThrowableCollector.java:73 ) ~[junit-platform-engine-1.9.2.jar:1.9.2] at org.junit.platform.engine.support .hierarchical.NodeTestTask.lambda$executeRecursively$8( NodeTestTask.java:141 ) ~[junit-platform-engine-1.9.2.jar:1.9.2] at org.junit.platform.engine.support .hierarchical.Node.around( Node.java:137 ) ~[junit-platform-engine-1.9.2.jar:1.9.2] at org.junit.platform.engine.support .hierarchical.NodeTestTask.lambda$executeRecursively$9( NodeTestTask.java:139 ) ~[junit-platform-engine-1.9.2.jar:1.9.2] at org.junit.platform.engine.support .hierarchical.ThrowableCollector.execute( ThrowableCollector.java:73 ) ~[junit-platform-engine-1.9.2.jar:1.9.2] at org.junit.platform.engine.support .hierarchical.NodeTestTask.executeRecursively( NodeTestTask.java:138 ) ~[junit-platform-engine-1.9.2.jar:1.9.2] at org.junit.platform.engine.support .hierarchical.NodeTestTask.execute( NodeTestTask.java:95 ) ~[junit-platform-engine-1.9.2.jar:1.9.2] at java.base/java.util.ArrayList.forEach( ArrayList.java:1511 ) ~[na:na] at org.junit.platform.engine.support .hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll( SameThreadHierarchicalTestExecutorService.java:41 ) ~[junit-platform-engine-1.9.2.jar:1.9.2] at org.junit.platform.engine.support .hierarchical.NodeTestTask.lambda$executeRecursively$6( NodeTestTask.java:155 ) ~[junit-platform-engine-1.9.2.jar:1.9.2] at org.junit.platform.engine.support .hierarchical.ThrowableCollector.execute( ThrowableCollector.java:73 ) ~[junit-platform-engine-1.9.2.jar:1.9.2] at org.junit.platform.engine.support .hierarchical.NodeTestTask.lambda$executeRecursively$8( NodeTestTask.java:141 ) ~[junit-platform-engine-1.9.2.jar:1.9.2] at org.junit.platform.engine.support .hierarchical.Node.around( Node.java:137 ) ~[junit-platform-engine-1.9.2.jar:1.9.2] at org.junit.platform.engine.support .hierarchical.NodeTestTask.lambda$executeRecursively$9( NodeTestTask.java:139 ) ~[junit-platform-engine-1.9.2.jar:1.9.2] at org.junit.platform.engine.support .hierarchical.ThrowableCollector.execute( ThrowableCollector.java:73 ) ~[junit-platform-engine-1.9.2.jar:1.9.2] at org.junit.platform.engine.support .hierarchical.NodeTestTask.executeRecursively( NodeTestTask.java:138 ) ~[junit-platform-engine-1.9.2.jar:1.9.2] at org.junit.platform.engine.support .hierarchical.NodeTestTask.execute( NodeTestTask.java:95 ) ~[junit-platform-engine-1.9.2.jar:1.9.2] at org.junit.platform.engine.support .hierarchical.SameThreadHierarchicalTestExecutorService.submit( SameThreadHierarchicalTestExecutorService.java:35 ) ~[junit-platform-engine-1.9.2.jar:1.9.2] at org.junit.platform.engine.support .hierarchical.HierarchicalTestExecutor.execute( HierarchicalTestExecutor.java:57 ) ~[junit-platform-engine-1.9.2.jar:1.9.2] at org.junit.platform.engine.support .hierarchical.HierarchicalTestEngine.execute( HierarchicalTestEngine.java:54 ) ~[junit-platform-engine-1.9.2.jar:1.9.2] at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute( EngineExecutionOrchestrator.java:107 ) ~[na:na] at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute( EngineExecutionOrchestrator.java:88 ) ~[na:na] at org.junit.platform.launcher.core.EngineExecutionOrchestrator.lambda$execute$0( EngineExecutionOrchestrator.java:54 ) ~[na:na] at org.junit.platform.launcher.core.EngineExecutionOrchestrator.withInterceptedStreams( EngineExecutionOrchestrator.java:67 ) ~[na:na] at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute( EngineExecutionOrchestrator.java:52 ) ~[na:na] at org.junit.platform.launcher.core.DefaultLauncher.execute( DefaultLauncher.java:114 ) ~[na:na] at org.junit.platform.launcher.core.DefaultLauncher.execute( DefaultLauncher.java:86 ) ~[na:na] at org.junit.platform.launcher.core.DefaultLauncherSession$DelegatingLauncher.execute( DefaultLauncherSession.java:86 ) ~[na:na] at org.junit.platform.launcher.core.SessionPerRequestLauncher.execute( SessionPerRequestLauncher.java:53 ) ~[na:na] at org.gradle.api.internal.tasks.testing.junitplatform.JUnitPlatformTestClassProcessor$CollectAllTestClassesExecutor.processAllTestClasses( JUnitPlatformTestClassProcessor.java:99 ) ~[na:na] at org.gradle.api.internal.tasks.testing.junitplatform.JUnitPlatformTestClassProcessor$CollectAllTestClassesExecutor.access$000( JUnitPlatformTestClassProcessor.java:79 ) ~[na:na] at org.gradle.api.internal.tasks.testing.junitplatform.JUnitPlatformTestClassProcessor.stop( JUnitPlatformTestClassProcessor.java:75 ) ~[na:na] at org.gradle.api.internal.tasks.testing.SuiteTestClassProcessor.stop( SuiteTestClassProcessor.java:62 ) ~[na:na] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke( NativeMethodAccessorImpl.java:77 ) ~[na:na] at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke( DelegatingMethodAccessorImpl.java:43 ) ~[na:na] at java.base/java.lang.reflect.Method.invoke( Method.java:568 ) ~[na:na] at org.gradle.internal.dispatch.ReflectionDispatch.dispatch( ReflectionDispatch.java:36 ) ~[na:na] at org.gradle.internal.dispatch.ReflectionDispatch.dispatch( ReflectionDispatch.java:24 ) ~[na:na] at org.gradle.internal.dispatch.ContextClassLoaderDispatch.dispatch( ContextClassLoaderDispatch.java:33 ) ~[na:na] at org.gradle.internal.dispatch.ProxyDispatchAdapter$DispatchingInvocationHandler.invoke( ProxyDispatchAdapter.java:94 ) ~[na:na] at jdk.proxy1/jdk.proxy1.$Proxy2.stop(Unknown Source) ~[na:na] at org.gradle.api.internal.tasks.testing.worker.TestWorker$3.run( TestWorker.java:193 ) ~[na:na] at org.gradle.api.internal.tasks.testing.worker.TestWorker.executeAndMaintainThreadName( TestWorker.java:129 ) ~[na:na] at org.gradle.api.internal.tasks.testing.worker.TestWorker.execute( TestWorker.java:100 ) ~[na:na] at org.gradle.api.internal.tasks.testing.worker.TestWorker.execute( TestWorker.java:60 ) ~[na:na] at org.gradle.process.internal.worker.child.ActionExecutionWorker.execute( ActionExecutionWorker.java:56 ) ~[na:na] at org.gradle.process.internal.worker.child.SystemApplicationClassLoaderWorker.call ( SystemApplicationClassLoaderWorker.java:113 ) ~[na:na] at org.gradle.process.internal.worker.child.SystemApplicationClassLoaderWorker.call ( SystemApplicationClassLoaderWorker.java:65 ) ~[na:na] at worker.org.gradle.process.internal.worker.GradleWorkerMain.run ( GradleWorkerMain.java:69 ) ~[gradle-worker.jar:na] at worker.org .gradle.process.internal.worker.GradleWorkerMain.main( GradleWorkerMain.java:74 ) ~[gradle-worker.jar:na] Caused by: jakarta.persistence.PersistenceException: [PersistenceUnit: default] Unable to build Hibernate SessionFactory; nested exception is org.hibernate.MappingException: Could not instantiate id generator [entity-name=jpabook.jpashop.Member] at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory( AbstractEntityManagerFactoryBean.java:421 ) ~[spring-orm-6.0.4.jar:6.0.4] at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet( AbstractEntityManagerFactoryBean.java:396 ) ~[spring-orm-6.0.4.jar:6.0.4] at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.afterPropertiesSet( LocalContainerEntityManagerFactoryBean.java:352 ) ~[spring-orm-6.0.4.jar:6.0.4] at org.springframework.beans.factory.support .AbstractAutowireCapableBeanFactory.invokeInitMethods( AbstractAutowireCapableBeanFactory.java:1797 ) ~[spring-beans-6.0.4.jar:6.0.4] at org.springframework.beans.factory.support .AbstractAutowireCapableBeanFactory.initializeBean( AbstractAutowireCapableBeanFactory.java:1747 ) ~[spring-beans-6.0.4.jar:6.0.4] ... 108 common frames omitted Caused by: org.hibernate.MappingException: Could not instantiate id generator [entity-name=jpabook.jpashop.Member] at org.hibernate.id .factory.internal.StandardIdentifierGeneratorFactory.createIdentifierGenerator( StandardIdentifierGeneratorFactory.java:222 ) ~[ hibernate-core-6.1.6.Final .jar: 6.1.6.Final ] at org.hibernate.mapping.SimpleValue.createIdentifierGenerator( SimpleValue.java:515 ) ~[ hibernate-core-6.1.6.Final .jar: 6.1.6.Final ] at org.hibernate.mapping.SimpleValue.createIdentifierGenerator( SimpleValue.java:372 ) ~[ hibernate-core-6.1.6.Final .jar: 6.1.6.Final ] at org.hibernate.internal.SessionFactoryImpl.lambda$new$1( SessionFactoryImpl.java:293 ) ~[ hibernate-core-6.1.6.Final .jar: 6.1.6.Final ] at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept( ForEachOps.java:183 ) ~[na:na] at java.base/java.util.stream.ReferencePipeline$2$1.accept( ReferencePipeline.java:179 ) ~[na:na] at java.base/java.util.HashMap$ValueSpliterator.forEachRemaining( HashMap.java:1779 ) ~[na:na] at java.base/java.util.stream.AbstractPipeline.copyInto( AbstractPipeline.java:509 ) ~[na:na] at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto( AbstractPipeline.java:499 ) ~[na:na] at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential( ForEachOps.java:150 ) ~[na:na] at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential( ForEachOps.java:173 ) ~[na:na] at java.base/java.util.stream.AbstractPipeline.evaluate( AbstractPipeline.java:234 ) ~[na:na] at java.base/java.util.stream.ReferencePipeline.forEach( ReferencePipeline.java:596 ) ~[na:na] at org.hibernate.internal.SessionFactoryImpl.<init>( SessionFactoryImpl.java:292 ) ~[ hibernate-core-6.1.6.Final .jar: 6.1.6.Final ] at org.hibernate.boot.internal.SessionFactoryBuilderImpl.build ( SessionFactoryBuilderImpl.java:415 ) ~[ hibernate-core-6.1.6.Final .jar: 6.1.6.Final ] at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build ( EntityManagerFactoryBuilderImpl.java:1425 ) ~[ hibernate-core-6.1.6.Final .jar: 6.1.6.Final ] at org.springframework.orm.jpa.vendor.SpringHibernateJpaPersistenceProvider.createContainerEntityManagerFactory( SpringHibernateJpaPersistenceProvider.java:66 ) ~[spring-orm-6.0.4.jar:6.0.4] at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory( LocalContainerEntityManagerFactoryBean.java:376 ) ~[spring-orm-6.0.4.jar:6.0.4] at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory( AbstractEntityManagerFactoryBean.java:409 ) ~[spring-orm-6.0.4.jar:6.0.4] ... 112 common frames omitted Caused by: org.hibernate.HibernateException: Could not fetch the SequenceInformation from the database at org.hibernate.engine.jdbc.env.internal.ExtractedDatabaseMetaDataImpl.sequenceInformationList( ExtractedDatabaseMetaDataImpl.java:302 ) ~[ hibernate-core-6.1.6.Final .jar: 6.1.6.Final ] at org.hibernate.engine.jdbc.env.internal.ExtractedDatabaseMetaDataImpl.getSequenceInformationList( ExtractedDatabaseMetaDataImpl.java:151 ) ~[ hibernate-core-6.1.6.Final .jar: 6.1.6.Final ] at org.hibernate.id .enhanced.SequenceStyleGenerator.getSequenceIncrementValue( SequenceStyleGenerator.java:561 ) ~[ hibernate-core-6.1.6.Final .jar: 6.1.6.Final ] at org.hibernate.id .enhanced.SequenceStyleGenerator.configure( SequenceStyleGenerator.java:210 ) ~[ hibernate-core-6.1.6.Final .jar: 6.1.6.Final ] at org.hibernate.id .factory.internal.StandardIdentifierGeneratorFactory.createIdentifierGenerator( StandardIdentifierGeneratorFactory.java:217 ) ~[ hibernate-core-6.1.6.Final .jar: 6.1.6.Final ] ... 130 common frames omitted Caused by: org.h2.jdbc.JdbcSQLSyntaxErrorException: Column "start_value" not found [42122-214] at org.h2.message.DbException.getJdbcSQLException( DbException.java:502 ) ~[h2-2.1.214.jar:2.1.214] at org.h2.message.DbException.getJdbcSQLException( DbException.java:477 ) ~[h2-2.1.214.jar:2.1.214] at org.h2.message.DbException.get( DbException.java:223 ) ~[h2-2.1.214.jar:2.1.214] at org.h2.message.DbException.get( DbException.java:199 ) ~[h2-2.1.214.jar:2.1.214] at org.h2.jdbc.JdbcResultSet.getColumnIndex( JdbcResultSet.java:3492 ) ~[h2-2.1.214.jar:2.1.214] at org.h2.jdbc.JdbcResultSet.getLong( JdbcResultSet.java:745 ) ~[h2-2.1.214.jar:2.1.214] at com.zaxxer.hikari.pool.HikariProxyResultSet.getLong( HikariProxyResultSet.java ) ~[HikariCP-5.0.1.jar:na] at org.hibernate.tool.schema.extract.internal.SequenceInformationExtractorLegacyImpl.resultSetStartValueSize( SequenceInformationExtractorLegacyImpl.java:110 ) ~[ hibernate-core-6.1.6.Final .jar: 6.1.6.Final ] at org.hibernate.tool.schema.extract.internal.SequenceInformationExtractorLegacyImpl.lambda$extractMetadata$0( SequenceInformationExtractorLegacyImpl.java:54 ) ~[ hibernate-core-6.1.6.Final .jar: 6.1.6.Final ] at org.hibernate.tool.schema.extract.spi.ExtractionContext.getQueryResults( ExtractionContext.java:50 ) ~[ hibernate-core-6.1.6.Final .jar: 6.1.6.Final ] at org.hibernate.tool.schema.extract.internal.SequenceInformationExtractorLegacyImpl.extractMetadata( SequenceInformationExtractorLegacyImpl.java:39 ) ~[ hibernate-core-6.1.6.Final .jar: 6.1.6.Final ] at org.hibernate.engine.jdbc.env.internal.ExtractedDatabaseMetaDataImpl.sequenceInformationList( ExtractedDatabaseMetaDataImpl.java:286 ) ~[ hibernate-core-6.1.6.Final .jar: 6.1.6.Final ] ... 134 common frames omitted ============================ CONDITIONS EVALUATION REPORT ============================ Positive matches: ----------------- None Negative matches: ----------------- None Exclusions: ----------- None Unconditional classes: ---------------------- None 2023-01-25T20:44:53.094+09:00 ERROR 21512 --- [ Test worker] o.s.test.context.TestContextManager : Caught exception while allowing TestExecutionListener [org.springframework.test.context.web.ServletTestExecutionListener] to prepare test instance [jpabook.jpashop.MemberRepositoryTest@5bd3ca3c] java.lang.IllegalStateException: Failed to load ApplicationContext for [WebMergedContextConfiguration@37f71c05 testClass = jpabook.jpashop.MemberRepositoryTest, locations = [], classes = [jpabook.jpashop.JpashopApplication], contextInitializerClasses = [], activeProfiles = [], propertySourceLocations = [], propertySourceProperties = ["org.springframework.boot.test.context.SpringBootTestContextBootstrapper=true"], contextCustomizers = [org.springframework.boot.test.autoconfigure.actuate.observability.ObservabilityContextCustomizerFactory$DisableObservabilityContextCustomizer@9da1, org.springframework.boot.test.autoconfigure.properties .PropertyMappingContextCustomizer@0, org.springframework.boot.test.autoconfigure.web.servlet.WebDriverContextCustomizerFactory$Customizer@1338fb5, org.springframework.boot.test.context.filter.ExcludeFilterContextCustomizer@fade1fc, org.springframework.boot.test.json.DuplicateJsonObjectContextCustomizerFactory$DuplicateJsonObjectContextCustomizer@7103cb56, org.springframework.boot.test.mock.mockito.MockitoContextCustomizer@0, org.springframework.boot.test.web.client.TestRestTemplateContextCustomizer@57ea113a, org.springframework.test.context.web.socket.MockServerContainerContextCustomizer@2072acb2, org.springframework.boot.test.context.SpringBootTestAnnotation@b8b80442], resourceBasePath = "src/main/webapp", contextLoader = org.springframework.boot.test.context.SpringBootContextLoader, parent = null] at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext( DefaultCacheAwareContextLoaderDelegate.java:142 ) ~[spring-test-6.0.4.jar:6.0.4] at org.springframework.test.context.support .DefaultTestContext.getApplicationContext( DefaultTestContext.java:127 ) ~[spring-test-6.0.4.jar:6.0.4] at org.springframework.test.context.web.ServletTestExecutionListener.setUpRequestContextIfNecessary( ServletTestExecutionListener.java:191 ) ~[spring-test-6.0.4.jar:6.0.4] at org.springframework.test.context.web.ServletTestExecutionListener.prepareTestInstance( ServletTestExecutionListener.java:130 ) ~[spring-test-6.0.4.jar:6.0.4] at org.springframework.test.context.TestContextManager.prepareTestInstance( TestContextManager.java:241 ) ~[spring-test-6.0.4.jar:6.0.4] at org.springframework.test.context.junit.jupiter.SpringExtension.postProcessTestInstance( SpringExtension.java:138 ) ~[spring-test-6.0.4.jar:6.0.4] at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$invokeTestInstancePostProcessors$10( ClassBasedTestDescriptor.java:377 ) ~[junit-jupiter-engine-5.9.2.jar:5.9.2] at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.executeAndMaskThrowable( ClassBasedTestDescriptor.java:382 ) ~[junit-jupiter-engine-5.9.2.jar:5.9.2] at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$invokeTestInstancePostProcessors$11( ClassBasedTestDescriptor.java:377 ) ~[junit-jupiter-engine-5.9.2.jar:5.9.2] at java.base/java.util.stream.ReferencePipeline$3$1.accept( ReferencePipeline.java:197 ) ~[na:na] at java.base/java.util.stream.ReferencePipeline$2$1.accept( ReferencePipeline.java:179 ) ~[na:na] at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining( ArrayList.java:1625 ) ~[na:na] at java.base/java.util.stream.AbstractPipeline.copyInto( AbstractPipeline.java:509 ) ~[na:na] at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto( AbstractPipeline.java:499 ) ~[na:na] at java.base/java.util.stream.StreamSpliterators$WrappingSpliterator.forEachRemaining( StreamSpliterators.java:310 ) ~[na:na] at java.base/java.util.stream.Streams$ConcatSpliterator.forEachRemaining( Streams.java:735 ) ~[na:na] at java.base/java.util.stream.Streams$ConcatSpliterator.forEachRemaining( Streams.java:734 ) ~[na:na] at java.base/java.util.stream.ReferencePipeline$Head.forEach( ReferencePipeline.java:762 ) ~[na:na] at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.invokeTestInstancePostProcessors( ClassBasedTestDescriptor.java:376 ) ~[junit-jupiter-engine-5.9.2.jar:5.9.2] at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$instantiateAndPostProcessTestInstance$6( ClassBasedTestDescriptor.java:289 ) ~[junit-jupiter-engine-5.9.2.jar:5.9.2] at org.junit.platform.engine.support .hierarchical.ThrowableCollector.execute( ThrowableCollector.java:73 ) ~[junit-platform-engine-1.9.2.jar:1.9.2] at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.instantiateAndPostProcessTestInstance( ClassBasedTestDescriptor.java:288 ) ~[junit-jupiter-engine-5.9.2.jar:5.9.2] at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$testInstancesProvider$4( ClassBasedTestDescriptor.java:278 ) ~[junit-jupiter-engine-5.9.2.jar:5.9.2] at java.base/java.util.Optional.orElseGet( Optional.java:364 ) ~[na:na] at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$testInstancesProvider$5( ClassBasedTestDescriptor.java:277 ) ~[junit-jupiter-engine-5.9.2.jar:5.9.2] at org.junit.jupiter.engine.execution.TestInstancesProvider.getTestInstances( TestInstancesProvider.java:31 ) ~[junit-jupiter-engine-5.9.2.jar:5.9.2] at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$prepare$0( TestMethodTestDescriptor.java:105 ) ~[junit-jupiter-engine-5.9.2.jar:5.9.2] at org.junit.platform.engine.support .hierarchical.ThrowableCollector.execute( ThrowableCollector.java:73 ) ~[junit-platform-engine-1.9.2.jar:1.9.2] at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.prepare( TestMethodTestDescriptor.java:104 ) ~[junit-jupiter-engine-5.9.2.jar:5.9.2] at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.prepare( TestMethodTestDescriptor.java:68 ) ~[junit-jupiter-engine-5.9.2.jar:5.9.2] at org.junit.platform.engine.support .hierarchical.NodeTestTask.lambda$prepare$2( NodeTestTask.java:123 ) ~[junit-platform-engine-1.9.2.jar:1.9.2] at org.junit.platform.engine.support .hierarchical.ThrowableCollector.execute( ThrowableCollector.java:73 ) ~[junit-platform-engine-1.9.2.jar:1.9.2] at org.junit.platform.engine.support .hierarchical.NodeTestTask.prepare( NodeTestTask.java:123 ) ~[junit-platform-engine-1.9.2.jar:1.9.2] at org.junit.platform.engine.support .hierarchical.NodeTestTask.execute( NodeTestTask.java:90 ) ~[junit-platform-engine-1.9.2.jar:1.9.2] at java.base/java.util.ArrayList.forEach( ArrayList.java:1511 ) ~[na:na] at org.junit.platform.engine.support .hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll( SameThreadHierarchicalTestExecutorService.java:41 ) ~[junit-platform-engine-1.9.2.jar:1.9.2] at org.junit.platform.engine.support .hierarchical.NodeTestTask.lambda$executeRecursively$6( NodeTestTask.java:155 ) ~[junit-platform-engine-1.9.2.jar:1.9.2] at org.junit.platform.engine.support .hierarchical.ThrowableCollector.execute( ThrowableCollector.java:73 ) ~[junit-platform-engine-1.9.2.jar:1.9.2] at org.junit.platform.engine.support .hierarchical.NodeTestTask.lambda$executeRecursively$8( NodeTestTask.java:141 ) ~[junit-platform-engine-1.9.2.jar:1.9.2] at org.junit.platform.engine.support .hierarchical.Node.around( Node.java:137 ) ~[junit-platform-engine-1.9.2.jar:1.9.2] at org.junit.platform.engine.support .hierarchical.NodeTestTask.lambda$executeRecursively$9( NodeTestTask.java:139 ) ~[junit-platform-engine-1.9.2.jar:1.9.2] at org.junit.platform.engine.support .hierarchical.ThrowableCollector.execute( ThrowableCollector.java:73 ) ~[junit-platform-engine-1.9.2.jar:1.9.2] at org.junit.platform.engine.support .hierarchical.NodeTestTask.executeRecursively( NodeTestTask.java:138 ) ~[junit-platform-engine-1.9.2.jar:1.9.2] at org.junit.platform.engine.support .hierarchical.NodeTestTask.execute( NodeTestTask.java:95 ) ~[junit-platform-engine-1.9.2.jar:1.9.2] at java.base/java.util.ArrayList.forEach( ArrayList.java:1511 ) ~[na:na] at org.junit.platform.engine.support .hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll( SameThreadHierarchicalTestExecutorService.java:41 ) ~[junit-platform-engine-1.9.2.jar:1.9.2] at org.junit.platform.engine.support .hierarchical.NodeTestTask.lambda$executeRecursively$6( NodeTestTask.java:155 ) ~[junit-platform-engine-1.9.2.jar:1.9.2] at org.junit.platform.engine.support .hierarchical.ThrowableCollector.execute( ThrowableCollector.java:73 ) ~[junit-platform-engine-1.9.2.jar:1.9.2] at org.junit.platform.engine.support .hierarchical.NodeTestTask.lambda$executeRecursively$8( NodeTestTask.java:141 ) ~[junit-platform-engine-1.9.2.jar:1.9.2] at org.junit.platform.engine.support .hierarchical.Node.around( Node.java:137 ) ~[junit-platform-engine-1.9.2.jar:1.9.2] at org.junit.platform.engine.support .hierarchical.NodeTestTask.lambda$executeRecursively$9( NodeTestTask.java:139 ) ~[junit-platform-engine-1.9.2.jar:1.9.2] at org.junit.platform.engine.support .hierarchical.ThrowableCollector.execute( ThrowableCollector.java:73 ) ~[junit-platform-engine-1.9.2.jar:1.9.2] at org.junit.platform.engine.support .hierarchical.NodeTestTask.executeRecursively( NodeTestTask.java:138 ) ~[junit-platform-engine-1.9.2.jar:1.9.2] at org.junit.platform.engine.support .hierarchical.NodeTestTask.execute( NodeTestTask.java:95 ) ~[junit-platform-engine-1.9.2.jar:1.9.2] at org.junit.platform.engine.support .hierarchical.SameThreadHierarchicalTestExecutorService.submit( SameThreadHierarchicalTestExecutorService.java:35 ) ~[junit-platform-engine-1.9.2.jar:1.9.2] at org.junit.platform.engine.support .hierarchical.HierarchicalTestExecutor.execute( HierarchicalTestExecutor.java:57 ) ~[junit-platform-engine-1.9.2.jar:1.9.2] at org.junit.platform.engine.support .hierarchical.HierarchicalTestEngine.execute( HierarchicalTestEngine.java:54 ) ~[junit-platform-engine-1.9.2.jar:1.9.2] at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute( EngineExecutionOrchestrator.java:107 ) ~[na:na] at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute( EngineExecutionOrchestrator.java:88 ) ~[na:na] at org.junit.platform.launcher.core.EngineExecutionOrchestrator.lambda$execute$0( EngineExecutionOrchestrator.java:54 ) ~[na:na] at org.junit.platform.launcher.core.EngineExecutionOrchestrator.withInterceptedStreams( EngineExecutionOrchestrator.java:67 ) ~[na:na] at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute( EngineExecutionOrchestrator.java:52 ) ~[na:na] at org.junit.platform.launcher.core.DefaultLauncher.execute( DefaultLauncher.java:114 ) ~[na:na] at org.junit.platform.launcher.core.DefaultLauncher.execute( DefaultLauncher.java:86 ) ~[na:na] at org.junit.platform.launcher.core.DefaultLauncherSession$DelegatingLauncher.execute( DefaultLauncherSession.java:86 ) ~[na:na] at org.junit.platform.launcher.core.SessionPerRequestLauncher.execute( SessionPerRequestLauncher.java:53 ) ~[na:na] at org.gradle.api.internal.tasks.testing.junitplatform.JUnitPlatformTestClassProcessor$CollectAllTestClassesExecutor.processAllTestClasses( JUnitPlatformTestClassProcessor.java:99 ) ~[na:na] at org.gradle.api.internal.tasks.testing.junitplatform.JUnitPlatformTestClassProcessor$CollectAllTestClassesExecutor.access$000( JUnitPlatformTestClassProcessor.java:79 ) ~[na:na] at org.gradle.api.internal.tasks.testing.junitplatform.JUnitPlatformTestClassProcessor.stop( JUnitPlatformTestClassProcessor.java:75 ) ~[na:na] at org.gradle.api.internal.tasks.testing.SuiteTestClassProcessor.stop( SuiteTestClassProcessor.java:62 ) ~[na:na] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke( NativeMethodAccessorImpl.java:77 ) ~[na:na] at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke( DelegatingMethodAccessorImpl.java:43 ) ~[na:na] at java.base/java.lang.reflect.Method.invoke( Method.java:568 ) ~[na:na] at org.gradle.internal.dispatch.ReflectionDispatch.dispatch( ReflectionDispatch.java:36 ) ~[na:na] at org.gradle.internal.dispatch.ReflectionDispatch.dispatch( ReflectionDispatch.java:24 ) ~[na:na] at org.gradle.internal.dispatch.ContextClassLoaderDispatch.dispatch( ContextClassLoaderDispatch.java:33 ) ~[na:na] at org.gradle.internal.dispatch.ProxyDispatchAdapter$DispatchingInvocationHandler.invoke( ProxyDispatchAdapter.java:94 ) ~[na:na] at jdk.proxy1/jdk.proxy1.$Proxy2.stop(Unknown Source) ~[na:na] at org.gradle.api.internal.tasks.testing.worker.TestWorker$3.run( TestWorker.java:193 ) ~[na:na] at org.gradle.api.internal.tasks.testing.worker.TestWorker.executeAndMaintainThreadName( TestWorker.java:129 ) ~[na:na] at org.gradle.api.internal.tasks.testing.worker.TestWorker.execute( TestWorker.java:100 ) ~[na:na] at org.gradle.api.internal.tasks.testing.worker.TestWorker.execute( TestWorker.java:60 ) ~[na:na] at org.gradle.process.internal.worker.child.ActionExecutionWorker.execute( ActionExecutionWorker.java:56 ) ~[na:na] at org.gradle.process.internal.worker.child.SystemApplicationClassLoaderWorker.call ( SystemApplicationClassLoaderWorker.java:113 ) ~[na:na] at org.gradle.process.internal.worker.child.SystemApplicationClassLoaderWorker.call ( SystemApplicationClassLoaderWorker.java:65 ) ~[na:na] at worker.org.gradle.process.internal.worker.GradleWorkerMain.run ( GradleWorkerMain.java:69 ) ~[gradle-worker.jar:na] at worker.org .gradle.process.internal.worker.GradleWorkerMain.main( GradleWorkerMain.java:74 ) ~[gradle-worker.jar:na] Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaConfiguration.class]: [PersistenceUnit: default] Unable to build Hibernate SessionFactory; nested exception is org.hibernate.MappingException: Could not instantiate id generator [entity-name=jpabook.jpashop.Member] at org.springframework.beans.factory.support .AbstractAutowireCapableBeanFactory.initializeBean( AbstractAutowireCapableBeanFactory.java:1751 ) ~[spring-beans-6.0.4.jar:6.0.4] at org.springframework.beans.factory.support .AbstractAutowireCapableBeanFactory.doCreateBean( AbstractAutowireCapableBeanFactory.java:599 ) ~[spring-beans-6.0.4.jar:6.0.4] at org.springframework.beans.factory.support .AbstractAutowireCapableBeanFactory.createBean( AbstractAutowireCapableBeanFactory.java:521 ) ~[spring-beans-6.0.4.jar:6.0.4] at org.springframework.beans.factory.support .AbstractBeanFactory.lambda$doGetBean$0( AbstractBeanFactory.java:326 ) ~[spring-beans-6.0.4.jar:6.0.4] at org.springframework.beans.factory.support .DefaultSingletonBeanRegistry.getSingleton( DefaultSingletonBeanRegistry.java:234 ) ~[spring-beans-6.0.4.jar:6.0.4] at org.springframework.beans.factory.support .AbstractBeanFactory.doGetBean( AbstractBeanFactory.java:324 ) ~[spring-beans-6.0.4.jar:6.0.4] at org.springframework.beans.factory.support .AbstractBeanFactory.getBean( AbstractBeanFactory.java:200 ) ~[spring-beans-6.0.4.jar:6.0.4] at org.springframework.context.support .AbstractApplicationContext.getBean( AbstractApplicationContext.java:1130 ) ~[spring-context-6.0.4.jar:6.0.4] at org.springframework.context.support .AbstractApplicationContext.finishBeanFactoryInitialization( AbstractApplicationContext.java:905 ) ~[spring-context-6.0.4.jar:6.0.4] at org.springframework.context.support .AbstractApplicationContext.refresh( AbstractApplicationContext.java:584 ) ~[spring-context-6.0.4.jar:6.0.4] at org.springframework.boot.SpringApplication.refresh( SpringApplication.java:730 ) ~[spring-boot-3.0.2.jar:3.0.2] at org.springframework.boot.SpringApplication.refreshContext( SpringApplication.java:432 ) ~[spring-boot-3.0.2.jar:3.0.2] at org.springframework.boot.SpringApplication.run ( SpringApplication.java:308 ) ~[spring-boot-3.0.2.jar:3.0.2] at org.springframework.boot.test.context.SpringBootContextLoader.lambda$loadContext$3( SpringBootContextLoader.java:137 ) ~[spring-boot-test-3.0.2.jar:3.0.2] at org.springframework.util.function.ThrowingSupplier.get( ThrowingSupplier.java:59 ) ~[spring-core-6.0.4.jar:6.0.4] at org.springframework.util.function.ThrowingSupplier.get( ThrowingSupplier.java:47 ) ~[spring-core-6.0.4.jar:6.0.4] at org.springframework.boot.SpringApplication.withHook( SpringApplication.java:1386 ) ~[spring-boot-3.0.2.jar:3.0.2] at org.springframework.boot.test.context.SpringBootContextLoader$ContextLoaderHook.run( SpringBootContextLoader.java:543 ) ~[spring-boot-test-3.0.2.jar:3.0.2] at org.springframework.boot.test.context.SpringBootContextLoader.loadContext( SpringBootContextLoader.java:137 ) ~[spring-boot-test-3.0.2.jar:3.0.2] at org.springframework.boot.test.context.SpringBootContextLoader.loadContext( SpringBootContextLoader.java:108 ) ~[spring-boot-test-3.0.2.jar:3.0.2] at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContextInternal( DefaultCacheAwareContextLoaderDelegate.java:184 ) ~[spring-test-6.0.4.jar:6.0.4] at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext( DefaultCacheAwareContextLoaderDelegate.java:118 ) ~[spring-test-6.0.4.jar:6.0.4] ... 87 common frames omitted Caused by: jakarta.persistence.PersistenceException: [PersistenceUnit: default] Unable to build Hibernate SessionFactory; nested exception is org.hibernate.MappingException: Could not instantiate id generator [entity-name=jpabook.jpashop.Member] at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory( AbstractEntityManagerFactoryBean.java:421 ) ~[spring-orm-6.0.4.jar:6.0.4] at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet( AbstractEntityManagerFactoryBean.java:396 ) ~[spring-orm-6.0.4.jar:6.0.4] at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.afterPropertiesSet( LocalContainerEntityManagerFactoryBean.java:352 ) ~[spring-orm-6.0.4.jar:6.0.4] at org.springframework.beans.factory.support .AbstractAutowireCapableBeanFactory.invokeInitMethods( AbstractAutowireCapableBeanFactory.java:1797 ) ~[spring-beans-6.0.4.jar:6.0.4] at org.springframework.beans.factory.support .AbstractAutowireCapableBeanFactory.initializeBean( AbstractAutowireCapableBeanFactory.java:1747 ) ~[spring-beans-6.0.4.jar:6.0.4] ... 108 common frames omitted Caused by: org.hibernate.MappingException: Could not instantiate id generator [entity-name=jpabook.jpashop.Member] at org.hibernate.id .factory.internal.StandardIdentifierGeneratorFactory.createIdentifierGenerator( StandardIdentifierGeneratorFactory.java:222 ) ~[ hibernate-core-6.1.6.Final .jar: 6.1.6.Final ] at org.hibernate.mapping.SimpleValue.createIdentifierGenerator( SimpleValue.java:515 ) ~[ hibernate-core-6.1.6.Final .jar: 6.1.6.Final ] at org.hibernate.mapping.SimpleValue.createIdentifierGenerator( SimpleValue.java:372 ) ~[ hibernate-core-6.1.6.Final .jar: 6.1.6.Final ] at org.hibernate.internal.SessionFactoryImpl.lambda$new$1( SessionFactoryImpl.java:293 ) ~[ hibernate-core-6.1.6.Final .jar: 6.1.6.Final ] at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept( ForEachOps.java:183 ) ~[na:na] at java.base/java.util.stream.ReferencePipeline$2$1.accept( ReferencePipeline.java:179 ) ~[na:na] at java.base/java.util.HashMap$ValueSpliterator.forEachRemaining( HashMap.java:1779 ) ~[na:na] at java.base/java.util.stream.AbstractPipeline.copyInto( AbstractPipeline.java:509 ) ~[na:na] at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto( AbstractPipeline.java:499 ) ~[na:na] at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential( ForEachOps.java:150 ) ~[na:na] at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential( ForEachOps.java:173 ) ~[na:na] at java.base/java.util.stream.AbstractPipeline.evaluate( AbstractPipeline.java:234 ) ~[na:na] at java.base/java.util.stream.ReferencePipeline.forEach( ReferencePipeline.java:596 ) ~[na:na] at org.hibernate.internal.SessionFactoryImpl.<init>( SessionFactoryImpl.java:292 ) ~[ hibernate-core-6.1.6.Final .jar: 6.1.6.Final ] at org.hibernate.boot.internal.SessionFactoryBuilderImpl.build ( SessionFactoryBuilderImpl.java:415 ) ~[ hibernate-core-6.1.6.Final .jar: 6.1.6.Final ] at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build ( EntityManagerFactoryBuilderImpl.java:1425 ) ~[ hibernate-core-6.1.6.Final .jar: 6.1.6.Final ] at org.springframework.orm.jpa.vendor.SpringHibernateJpaPersistenceProvider.createContainerEntityManagerFactory( SpringHibernateJpaPersistenceProvider.java:66 ) ~[spring-orm-6.0.4.jar:6.0.4] at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory( LocalContainerEntityManagerFactoryBean.java:376 ) ~[spring-orm-6.0.4.jar:6.0.4] at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory( AbstractEntityManagerFactoryBean.java:409 ) ~[spring-orm-6.0.4.jar:6.0.4] ... 112 common frames omitted Caused by: org.hibernate.HibernateException: Could not fetch the SequenceInformation from the database at org.hibernate.engine.jdbc.env.internal.ExtractedDatabaseMetaDataImpl.sequenceInformationList( ExtractedDatabaseMetaDataImpl.java:302 ) ~[ hibernate-core-6.1.6.Final .jar: 6.1.6.Final ] at org.hibernate.engine.jdbc.env.internal.ExtractedDatabaseMetaDataImpl.getSequenceInformationList( ExtractedDatabaseMetaDataImpl.java:151 ) ~[ hibernate-core-6.1.6.Final .jar: 6.1.6.Final ] at org.hibernate.id .enhanced.SequenceStyleGenerator.getSequenceIncrementValue( SequenceStyleGenerator.java:561 ) ~[ hibernate-core-6.1.6.Final .jar: 6.1.6.Final ] at org.hibernate.id .enhanced.SequenceStyleGenerator.configure( SequenceStyleGenerator.java:210 ) ~[ hibernate-core-6.1.6.Final .jar: 6.1.6.Final ] at org.hibernate.id .factory.internal.StandardIdentifierGeneratorFactory.createIdentifierGenerator( StandardIdentifierGeneratorFactory.java:217 ) ~[ hibernate-core-6.1.6.Final .jar: 6.1.6.Final ] ... 130 common frames omitted Caused by: org.h2.jdbc.JdbcSQLSyntaxErrorException: Column "start_value" not found [42122-214] at org.h2.message.DbException.getJdbcSQLException( DbException.java:502 ) ~[h2-2.1.214.jar:2.1.214] at org.h2.message.DbException.getJdbcSQLException( DbException.java:477 ) ~[h2-2.1.214.jar:2.1.214] at org.h2.message.DbException.get( DbException.java:223 ) ~[h2-2.1.214.jar:2.1.214] at org.h2.message.DbException.get( DbException.java:199 ) ~[h2-2.1.214.jar:2.1.214] at org.h2.jdbc.JdbcResultSet.getColumnIndex( JdbcResultSet.java:3492 ) ~[h2-2.1.214.jar:2.1.214] at org.h2.jdbc.JdbcResultSet.getLong( JdbcResultSet.java:745 ) ~[h2-2.1.214.jar:2.1.214] at com.zaxxer.hikari.pool.HikariProxyResultSet.getLong( HikariProxyResultSet.java ) ~[HikariCP-5.0.1.jar:na] at org.hibernate.tool.schema.extract.internal.SequenceInformationExtractorLegacyImpl.resultSetStartValueSize( SequenceInformationExtractorLegacyImpl.java:110 ) ~[ hibernate-core-6.1.6.Final .jar: 6.1.6.Final ] at org.hibernate.tool.schema.extract.internal.SequenceInformationExtractorLegacyImpl.lambda$extractMetadata$0( SequenceInformationExtractorLegacyImpl.java:54 ) ~[ hibernate-core-6.1.6.Final .jar: 6.1.6.Final ] at org.hibernate.tool.schema.extract.spi.ExtractionContext.getQueryResults( ExtractionContext.java:50 ) ~[ hibernate-core-6.1.6.Final .jar: 6.1.6.Final ] at org.hibernate.tool.schema.extract.internal.SequenceInformationExtractorLegacyImpl.extractMetadata( SequenceInformationExtractorLegacyImpl.java:39 ) ~[ hibernate-core-6.1.6.Final .jar: 6.1.6.Final ] at org.hibernate.engine.jdbc.env.internal.ExtractedDatabaseMetaDataImpl.sequenceInformationList( ExtractedDatabaseMetaDataImpl.java:286 ) ~[ hibernate-core-6.1.6.Final .jar: 6.1.6.Final ] ... 134 common frames omitted Failed to load ApplicationContext for [WebMergedContextConfiguration@37f71c05 testClass = jpabook.jpashop.MemberRepositoryTest, locations = [], classes = [jpabook.jpashop.JpashopApplication], contextInitializerClasses = [], activeProfiles = [], propertySourceLocations = [], propertySourceProperties = ["org.springframework.boot.test.context.SpringBootTestContextBootstrapper=true"], contextCustomizers = [org.springframework.boot.test.autoconfigure.actuate.observability.ObservabilityContextCustomizerFactory$DisableObservabilityContextCustomizer@9da1, org.springframework.boot.test.autoconfigure.properties .PropertyMappingContextCustomizer@0, org.springframework.boot.test.autoconfigure.web.servlet.WebDriverContextCustomizerFactory$Customizer@1338fb5, org.springframework.boot.test.context.filter.ExcludeFilterContextCustomizer@fade1fc, org.springframework.boot.test.json.DuplicateJsonObjectContextCustomizerFactory$DuplicateJsonObjectContextCustomizer@7103cb56, org.springframework.boot.test.mock.mockito.MockitoContextCustomizer@0, org.springframework.boot.test.web.client.TestRestTemplateContextCustomizer@57ea113a, org.springframework.test.context.web.socket.MockServerContainerContextCustomizer@2072acb2, org.springframework.boot.test.context.SpringBootTestAnnotation@b8b80442], resourceBasePath = "src/main/webapp", contextLoader = org.springframework.boot.test.context.SpringBootContextLoader, parent = null] java.lang.IllegalStateException: Failed to load ApplicationContext for [WebMergedContextConfiguration@37f71c05 testClass = jpabook.jpashop.MemberRepositoryTest, locations = [], classes = [jpabook.jpashop.JpashopApplication], contextInitializerClasses = [], activeProfiles = [], propertySourceLocations = [], propertySourceProperties = ["org.springframework.boot.test.context.SpringBootTestContextBootstrapper=true"], contextCustomizers = [org.springframework.boot.test.autoconfigure.actuate.observability.ObservabilityContextCustomizerFactory$DisableObservabilityContextCustomizer@9da1, org.springframework.boot.test.autoconfigure.properties .PropertyMappingContextCustomizer@0, org.springframework.boot.test.autoconfigure.web.servlet.WebDriverContextCustomizerFactory$Customizer@1338fb5, org.springframework.boot.test.context.filter.ExcludeFilterContextCustomizer@fade1fc, org.springframework.boot.test.json.DuplicateJsonObjectContextCustomizerFactory$DuplicateJsonObjectContextCustomizer@7103cb56, org.springframework.boot.test.mock.mockito.MockitoContextCustomizer@0, org.springframework.boot.test.web.client.TestRestTemplateContextCustomizer@57ea113a, org.springframework.test.context.web.socket.MockServerContainerContextCustomizer@2072acb2, org.springframework.boot.test.context.SpringBootTestAnnotation@b8b80442], resourceBasePath = "src/main/webapp", contextLoader = org.springframework.boot.test.context.SpringBootContextLoader, parent = null] at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext( DefaultCacheAwareContextLoaderDelegate.java:142 ) at org.springframework.test.context.support .DefaultTestContext.getApplicationContext( DefaultTestContext.java:127 ) at org.springframework.test.context.web.ServletTestExecutionListener.setUpRequestContextIfNecessary( ServletTestExecutionListener.java:191 ) at org.springframework.test.context.web.ServletTestExecutionListener.prepareTestInstance( ServletTestExecutionListener.java:130 ) at org.springframework.test.context.TestContextManager.prepareTestInstance( TestContextManager.java:241 ) at org.springframework.test.context.junit.jupiter.SpringExtension.postProcessTestInstance( SpringExtension.java:138 ) at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$invokeTestInstancePostProcessors$10( ClassBasedTestDescriptor.java:377 ) at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.executeAndMaskThrowable( ClassBasedTestDescriptor.java:382 ) at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$invokeTestInstancePostProcessors$11( ClassBasedTestDescriptor.java:377 ) at java.base/java.util.stream.ReferencePipeline$3$1.accept( ReferencePipeline.java:197 ) at java.base/java.util.stream.ReferencePipeline$2$1.accept( ReferencePipeline.java:179 ) at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining( ArrayList.java:1625 ) at java.base/java.util.stream.AbstractPipeline.copyInto( AbstractPipeline.java:509 ) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto( AbstractPipeline.java:499 ) at java.base/java.util.stream.StreamSpliterators$WrappingSpliterator.forEachRemaining( StreamSpliterators.java:310 ) at java.base/java.util.stream.Streams$ConcatSpliterator.forEachRemaining( Streams.java:735 ) at java.base/java.util.stream.Streams$ConcatSpliterator.forEachRemaining( Streams.java:734 ) at java.base/java.util.stream.ReferencePipeline$Head.forEach( ReferencePipeline.java:762 ) at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.invokeTestInstancePostProcessors( ClassBasedTestDescriptor.java:376 ) at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$instantiateAndPostProcessTestInstance$6( ClassBasedTestDescriptor.java:289 ) at org.junit.platform.engine.support .hierarchical.ThrowableCollector.execute( ThrowableCollector.java:73 ) at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.instantiateAndPostProcessTestInstance( ClassBasedTestDescriptor.java:288 ) at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$testInstancesProvider$4( ClassBasedTestDescriptor.java:278 ) at java.base/java.util.Optional.orElseGet( Optional.java:364 ) at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$testInstancesProvider$5( ClassBasedTestDescriptor.java:277 ) at org.junit.jupiter.engine.execution.TestInstancesProvider.getTestInstances( TestInstancesProvider.java:31 ) at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$prepare$0( TestMethodTestDescriptor.java:105 ) at org.junit.platform.engine.support .hierarchical.ThrowableCollector.execute( ThrowableCollector.java:73 ) at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.prepare( TestMethodTestDescriptor.java:104 ) at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.prepare( TestMethodTestDescriptor.java:68 ) at org.junit.platform.engine.support .hierarchical.NodeTestTask.lambda$prepare$2( NodeTestTask.java:123 ) at org.junit.platform.engine.support .hierarchical.ThrowableCollector.execute( ThrowableCollector.java:73 ) at org.junit.platform.engine.support .hierarchical.NodeTestTask.prepare( NodeTestTask.java:123 ) at org.junit.platform.engine.support .hierarchical.NodeTestTask.execute( NodeTestTask.java:90 ) at java.base/java.util.ArrayList.forEach( ArrayList.java:1511 ) at org.junit.platform.engine.support .hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll( SameThreadHierarchicalTestExecutorService.java:41 ) at org.junit.platform.engine.support .hierarchical.NodeTestTask.lambda$executeRecursively$6( NodeTestTask.java:155 ) at org.junit.platform.engine.support .hierarchical.ThrowableCollector.execute( ThrowableCollector.java:73 ) at org.junit.platform.engine.support .hierarchical.NodeTestTask.lambda$executeRecursively$8( NodeTestTask.java:141 ) at org.junit.platform.engine.support .hierarchical.Node.around( Node.java:137 ) at org.junit.platform.engine.support .hierarchical.NodeTestTask.lambda$executeRecursively$9( NodeTestTask.java:139 ) at org.junit.platform.engine.support .hierarchical.ThrowableCollector.execute( ThrowableCollector.java:73 ) at org.junit.platform.engine.support .hierarchical.NodeTestTask.executeRecursively( NodeTestTask.java:138 ) at org.junit.platform.engine.support .hierarchical.NodeTestTask.execute( NodeTestTask.java:95 ) at java.base/java.util.ArrayList.forEach( ArrayList.java:1511 ) at org.junit.platform.engine.support .hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll( SameThreadHierarchicalTestExecutorService.java:41 ) at org.junit.platform.engine.support .hierarchical.NodeTestTask.lambda$executeRecursively$6( NodeTestTask.java:155 ) at org.junit.platform.engine.support .hierarchical.ThrowableCollector.execute( ThrowableCollector.java:73 ) at org.junit.platform.engine.support .hierarchical.NodeTestTask.lambda$executeRecursively$8( NodeTestTask.java:141 ) at org.junit.platform.engine.support .hierarchical.Node.around( Node.java:137 ) at org.junit.platform.engine.support .hierarchical.NodeTestTask.lambda$executeRecursively$9( NodeTestTask.java:139 ) at org.junit.platform.engine.support .hierarchical.ThrowableCollector.execute( ThrowableCollector.java:73 ) at org.junit.platform.engine.support .hierarchical.NodeTestTask.executeRecursively( NodeTestTask.java:138 ) at org.junit.platform.engine.support .hierarchical.NodeTestTask.execute( NodeTestTask.java:95 ) at org.junit.platform.engine.support .hierarchical.SameThreadHierarchicalTestExecutorService.submit( SameThreadHierarchicalTestExecutorService.java:35 ) at org.junit.platform.engine.support .hierarchical.HierarchicalTestExecutor.execute( HierarchicalTestExecutor.java:57 ) at org.junit.platform.engine.support .hierarchical.HierarchicalTestEngine.execute( HierarchicalTestEngine.java:54 ) at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute( EngineExecutionOrchestrator.java:107 ) at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute( EngineExecutionOrchestrator.java:88 ) at org.junit.platform.launcher.core.EngineExecutionOrchestrator.lambda$execute$0( EngineExecutionOrchestrator.java:54 ) at org.junit.platform.launcher.core.EngineExecutionOrchestrator.withInterceptedStreams( EngineExecutionOrchestrator.java:67 ) at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute( EngineExecutionOrchestrator.java:52 ) at org.junit.platform.launcher.core.DefaultLauncher.execute( DefaultLauncher.java:114 ) at org.junit.platform.launcher.core.DefaultLauncher.execute( DefaultLauncher.java:86 ) at org.junit.platform.launcher.core.DefaultLauncherSession$DelegatingLauncher.execute( DefaultLauncherSession.java:86 ) at org.junit.platform.launcher.core.SessionPerRequestLauncher.execute( SessionPerRequestLauncher.java:53 ) at org.gradle.api.internal.tasks.testing.junitplatform.JUnitPlatformTestClassProcessor$CollectAllTestClassesExecutor.processAllTestClasses( JUnitPlatformTestClassProcessor.java:99 ) at org.gradle.api.internal.tasks.testing.junitplatform.JUnitPlatformTestClassProcessor$CollectAllTestClassesExecutor.access$000( JUnitPlatformTestClassProcessor.java:79 ) at org.gradle.api.internal.tasks.testing.junitplatform.JUnitPlatformTestClassProcessor.stop( JUnitPlatformTestClassProcessor.java:75 ) at org.gradle.api.internal.tasks.testing.SuiteTestClassProcessor.stop( SuiteTestClassProcessor.java:62 ) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke( NativeMethodAccessorImpl.java:77 ) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke( DelegatingMethodAccessorImpl.java:43 ) at java.base/java.lang.reflect.Method.invoke( Method.java:568 ) at org.gradle.internal.dispatch.ReflectionDispatch.dispatch( ReflectionDispatch.java:36 ) at org.gradle.internal.dispatch.ReflectionDispatch.dispatch( ReflectionDispatch.java:24 ) at org.gradle.internal.dispatch.ContextClassLoaderDispatch.dispatch( ContextClassLoaderDispatch.java:33 ) at org.gradle.internal.dispatch.ProxyDispatchAdapter$DispatchingInvocationHandler.invoke( ProxyDispatchAdapter.java:94 ) at jdk.proxy1/jdk.proxy1.$Proxy2.stop(Unknown Source) at org.gradle.api.internal.tasks.testing.worker.TestWorker$3.run( TestWorker.java:193 ) at org.gradle.api.internal.tasks.testing.worker.TestWorker.executeAndMaintainThreadName( TestWorker.java:129 ) at org.gradle.api.internal.tasks.testing.worker.TestWorker.execute( TestWorker.java:100 ) at org.gradle.api.internal.tasks.testing.worker.TestWorker.execute( TestWorker.java:60 ) at org.gradle.process.internal.worker.child.ActionExecutionWorker.execute( ActionExecutionWorker.java:56 ) at org.gradle.process.internal.worker.child.SystemApplicationClassLoaderWorker.call ( SystemApplicationClassLoaderWorker.java:113 ) at org.gradle.process.internal.worker.child.SystemApplicationClassLoaderWorker.call ( SystemApplicationClassLoaderWorker.java:65 ) at worker.org.gradle.process.internal.worker.GradleWorkerMain.run ( GradleWorkerMain.java:69 ) at worker.org .gradle.process.internal.worker.GradleWorkerMain.main( GradleWorkerMain.java:74 ) Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaConfiguration.class]: [PersistenceUnit: default] Unable to build Hibernate SessionFactory; nested exception is org.hibernate.MappingException: Could not instantiate id generator [entity-name=jpabook.jpashop.Member] at app//org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean( AbstractAutowireCapableBeanFactory.java:1751 ) at app//org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean( AbstractAutowireCapableBeanFactory.java:599 ) at app//org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean( AbstractAutowireCapableBeanFactory.java:521 ) at app//org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0( AbstractBeanFactory.java:326 ) at app//org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton( DefaultSingletonBeanRegistry.java:234 ) at app//org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean( AbstractBeanFactory.java:324 ) at app//org.springframework.beans.factory.support.AbstractBeanFactory.getBean( AbstractBeanFactory.java:200 ) at app//org.springframework.context.support.AbstractApplicationContext.getBean( AbstractApplicationContext.java:1130 ) at app//org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization( AbstractApplicationContext.java:905 ) at app//org.springframework.context.support.AbstractApplicationContext.refresh( AbstractApplicationContext.java:584 ) at app//org.springframework.boot.SpringApplication.refresh( SpringApplication.java:730 ) at app//org.springframework.boot.SpringApplication.refreshContext( SpringApplication.java:432 ) at app//org.springframework.boot.SpringApplication.run( SpringApplication.java:308 ) at app//org.springframework.boot.test.context.SpringBootContextLoader.lambda$loadContext$3( SpringBootContextLoader.java:137 ) at app//org.springframework.util.function.ThrowingSupplier.get( ThrowingSupplier.java:59 ) at app//org.springframework.util.function.ThrowingSupplier.get( ThrowingSupplier.java:47 ) at app//org.springframework.boot.SpringApplication.withHook( SpringApplication.java:1386 ) at app//org.springframework.boot.test.context.SpringBootContextLoader$ContextLoaderHook.run( SpringBootContextLoader.java:543 ) at app//org.springframework.boot.test.context.SpringBootContextLoader.loadContext( SpringBootContextLoader.java:137 ) at app//org.springframework.boot.test.context.SpringBootContextLoader.loadContext( SpringBootContextLoader.java:108 ) at app//org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContextInternal( DefaultCacheAwareContextLoaderDelegate.java:184 ) at app//org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext( DefaultCacheAwareContextLoaderDelegate.java:118 ) ... 87 more Caused by: jakarta.persistence.PersistenceException: [PersistenceUnit: default] Unable to build Hibernate SessionFactory; nested exception is org.hibernate.MappingException: Could not instantiate id generator [entity-name=jpabook.jpashop.Member] at app//org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory( AbstractEntityManagerFactoryBean.java:421 ) at app//org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet( AbstractEntityManagerFactoryBean.java:396 ) at app//org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.afterPropertiesSet( LocalContainerEntityManagerFactoryBean.java:352 ) at app//org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods( AbstractAutowireCapableBeanFactory.java:1797 ) at app//org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean( AbstractAutowireCapableBeanFactory.java:1747 ) ... 108 more Caused by: org.hibernate.MappingException: Could not instantiate id generator [entity-name=jpabook.jpashop.Member] at app//org.hibernate.id.factory.internal.StandardIdentifierGeneratorFactory.createIdentifierGenerator( StandardIdentifierGeneratorFactory.java:222 ) at app//org.hibernate.mapping.SimpleValue.createIdentifierGenerator( SimpleValue.java:515 ) at app//org.hibernate.mapping.SimpleValue.createIdentifierGenerator( SimpleValue.java:372 ) at app//org.hibernate.internal.SessionFactoryImpl.lambda$new$1( SessionFactoryImpl.java:293 ) at java.base@17.0.2/ java.util.stream .ForEachOps$ForEachOp$OfRef.accept( ForEachOps.java:183 ) at java.base@17.0.2/ java.util.stream .ReferencePipeline$2$1.accept( ReferencePipeline.java:179 ) at java.base@17.0.2/java.util.HashMap$ValueSpliterator.forEachRemaining( HashMap.java:1779 ) at java.base@17.0.2/ java.util.stream .AbstractPipeline.copyInto( AbstractPipeline.java:509 ) at java.base@17.0.2/ java.util.stream .AbstractPipeline.wrapAndCopyInto( AbstractPipeline.java:499 ) at java.base@17.0.2/ java.util.stream .ForEachOps$ForEachOp.evaluateSequential( ForEachOps.java:150 ) at java.base@17.0.2/ java.util.stream .ForEachOps$ForEachOp$OfRef.evaluateSequential( ForEachOps.java:173 ) at java.base@17.0.2/ java.util.stream .AbstractPipeline.evaluate( AbstractPipeline.java:234 ) at java.base@17.0.2/ java.util.stream .ReferencePipeline.forEach( ReferencePipeline.java:596 ) at app//org.hibernate.internal.SessionFactoryImpl.<init>( SessionFactoryImpl.java:292 ) at app//org.hibernate.boot.internal.SessionFactoryBuilderImpl.build( SessionFactoryBuilderImpl.java:415 ) at app//org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build( EntityManagerFactoryBuilderImpl.java:1425 ) at app//org.springframework.orm.jpa.vendor.SpringHibernateJpaPersistenceProvider.createContainerEntityManagerFactory( SpringHibernateJpaPersistenceProvider.java:66 ) at app//org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory( LocalContainerEntityManagerFactoryBean.java:376 ) at app//org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory( AbstractEntityManagerFactoryBean.java:409 ) ... 112 more Caused by: org.hibernate.HibernateException: Could not fetch the SequenceInformation from the database at app//org.hibernate.engine.jdbc.env.internal.ExtractedDatabaseMetaDataImpl.sequenceInformationList( ExtractedDatabaseMetaDataImpl.java:302 ) at app//org.hibernate.engine.jdbc.env.internal.ExtractedDatabaseMetaDataImpl.getSequenceInformationList( ExtractedDatabaseMetaDataImpl.java:151 ) at app//org.hibernate.id.enhanced.SequenceStyleGenerator.getSequenceIncrementValue( SequenceStyleGenerator.java:561 ) at app//org.hibernate.id.enhanced.SequenceStyleGenerator.configure( SequenceStyleGenerator.java:210 ) at app//org.hibernate.id.factory.internal.StandardIdentifierGeneratorFactory.createIdentifierGenerator( StandardIdentifierGeneratorFactory.java:217 ) ... 130 more Caused by: org.h2.jdbc.JdbcSQLSyntaxErrorException: Column "start_value" not found [42122-214] at app//org.h2.message.DbException.getJdbcSQLException( DbException.java:502 ) at app//org.h2.message.DbException.getJdbcSQLException( DbException.java:477 ) at app//org.h2.message.DbException.get( DbException.java:223 ) at app//org.h2.message.DbException.get( DbException.java:199 ) at app//org.h2.jdbc.JdbcResultSet.getColumnIndex( JdbcResultSet.java:3492 ) at app//org.h2.jdbc.JdbcResultSet.getLong( JdbcResultSet.java:745 ) at app//com.zaxxer.hikari.pool.HikariProxyResultSet.getLong( HikariProxyResultSet.java ) at app//org.hibernate.tool.schema.extract.internal.SequenceInformationExtractorLegacyImpl.resultSetStartValueSize( SequenceInformationExtractorLegacyImpl.java:110 ) at app//org.hibernate.tool.schema.extract.internal.SequenceInformationExtractorLegacyImpl.lambda$extractMetadata$0( SequenceInformationExtractorLegacyImpl.java:54 ) at app//org.hibernate.tool.schema.extract.spi.ExtractionContext.getQueryResults( ExtractionContext.java:50 ) at app//org.hibernate.tool.schema.extract.internal.SequenceInformationExtractorLegacyImpl.extractMetadata( SequenceInformationExtractorLegacyImpl.java:39 ) at app//org.hibernate.engine.jdbc.env.internal.ExtractedDatabaseMetaDataImpl.sequenceInformationList( ExtractedDatabaseMetaDataImpl.java:286 ) ... 134 more MemberRepositoryTest > testMember() FAILED java.lang.IllegalStateException at DefaultCacheAwareContextLoaderDelegate.java:142 Caused by: org.springframework.beans.factory.BeanCreationException at AbstractAutowireCapableBeanFactory.java:1751 Caused by: jakarta.persistence.PersistenceException at AbstractEntityManagerFactoryBean.java:421 Caused by: org.hibernate.MappingException at StandardIdentifierGeneratorFactory.java:222 Caused by: org.hibernate.HibernateException at ExtractedDatabaseMetaDataImpl.java:302 Caused by: org.h2.jdbc.JdbcSQLSyntaxErrorException at DbException.java:502 1 test completed, 1 failed > Task :test FAILED FAILURE: Build failed with an exception. * What went wrong: Execution failed for task ':test'. > There were failing tests. See the report at: file:///C:/Users/User/source/BackEnd/SpringBoot1/jpashop/jpashop/build/reports/tests/test/index.html * Try: > Run with --stacktrace option to get the stack trace. > Run with --info or --debug option to get more log output. > Run with --scan to get full insights. * Get more help at https://help.gradle.org BUILD FAILED in 8s 4 actionable tasks: 2 executed, 2 up-to-date
KeyCloak 을 인가서버로 활용하고 Resource 자원 사용하는 Data API 인가 처리를 하는 Auth API (Gateway) 를 구현해서 진행하고 있습니다. 그런데 너무 여러가지 방식이 많다보니 혼돈이 와서 선생님이 가르쳐주신 방식으로 인가와 인증을 구현하려고하는데, 인가 서버 -> KeyCloak 사용 게이트 웨이에 Oauth2 를 넣으려고 하는데 개념적으로 궁금한 점이 있어 여쭤봅니다. 공개 클라이언트 방식과 기밀 클라이언트 가 구현함에 있어 어떤 차이를 가지는지 의문입니다. 가령 react -> KeyCloak 요청 시 token 을 바로 가져오려고 하는데, 이 토큰을 받는 것 까진 문제가 없습니다. 하지만 영상에서 보여주신 것과 같이 자원 API 로 접근하는 권한을 획득하기 위해서 기밀 클라이언트 방식으로 구현하면 code 를 리다이렉트 받은 uri 와 token 요청시 리다이렉트 uri 가 같아야하는 문제가 있어서 code 를 auth api 로 받은 뒤 토큰 엔드포인트를 찍어 스프링 프로젝트에서 가져올 때 오류가 발생합니다. react -> keycloak -> code 반환 받은 것 -> spring -> redirect uri 문제로 토큰 발급 불가 가 되는데 어떤 형식으로 처리해야 맞는 것인지 궁금합니다.
[질문 템플릿] 1. 강의 내용과 관련된 질문인가요? (예/아니오) 예 2. 인프런의 질문 게시판과 자주 하는 질문에 없는 내용인가요? (예/아니오) 예 3. 질문 잘하기 메뉴얼을 읽어보셨나요? (예/아니오) 예 [질문 내용] 여기에 질문 내용을 남겨주세요. application.yml jpa: hibernate: ddl-auto: create 이라 되어 있는데, 기존의 테이블이 드랍되지 않습니다. 질문 게시판을 검색해보니, H2의 버전이 1.4.200인 경우에는 하이버네이트 버전을 5.4.13.Final 로 바꿔야 한다고 되어 있네요. 그래서, build.gradle 에 ext["hibernate.version"] = " 5.4.13.Final " 를 추가 해놓고 다시 돌려보니 이제는 엄청난 에러메시지가 나오네용.. 하이버네이트 버전을 바꾸는 방법이 올바르지 않았나요?
안녕하세요 챕터 6 부분을 공부하고 있는데 void를 쓰는 경우와 안쓰는 경우의 차이가 잘 와닫지 않습니다. 리턴값이 없으면 void를 쓰고, 리턴값이 있으면 void를 안쓴다고 알고 있는데 리턴값부터 이해가 잘 가지 않네요! 예를 들어서 // 호텔 주소 public static String getAdress() { return "서울시 어딘가"; } 과 셋째 줄에 sout "서울시 어딘가" 를 쓰는 것은 무엇이 다른건지요? 감사합니다 :)
학습하는 분들께 도움이 되고, 더 좋은 답변을 드릴 수 있도록 질문전에 다음을 꼭 확인해주세요. 1. 강의 내용과 관련된 질문을 남겨주세요. 2. 인프런의 질문 게시판과 자주 하는 질문(링크)을 먼저 확인해주세요. (자주 하는 질문 링크: https://bit.ly/3fX6ygx) 3. 질문 잘하기 메뉴얼(링크)을 먼저 읽어주세요. (질문 잘하기 메뉴얼 링크: https://bit.ly/2UfeqCG) 질문 시에는 위 내용은 삭제하고 다음 내용을 남겨주세요. ========================================= [질문 템플릿] 1. 강의 내용과 관련된 질문인가요? (예/아니오)예 2. 인프런의 질문 게시판과 자주 하는 질문에 없는 내용인가요? (예/아니오) 3. 질문 잘하기 메뉴얼을 읽어보셨나요? (예/아니오) [질문 내용] 여기에 질문 내용을 남겨주세요. 쿼리 dsl에서 많이 설명 해주셨는데요 그렇다면 dsl을 쓰는 현업에서는 jpql을 사용할 일이 전혀 없을까요 ? 전혀 없다고 해도 근본이 되는 jpql을 알아둬야 하겠지만 학습시간에 대한 비중을 어디에 크게 둬야 할지 의문입니다 .
public List<IPacket> PopAll() { List<IPacket> list = new List<IPacket>(); lock(_lock) { ...어떤 처리.. } } 이 함수가 멀티 스레드로 실행 된다고 했을대 list 이 변수는 안에가 list 형태인데 linkedlist 같은것도 스레드 세이프 한건가요? 여러개의 스레드가 linkedlist 를 생성만 한다고 했을때(위의 예시처럼 원소 추가나 조작 없이) 동시에 new 연산이 내부에서 실행 된다 여러개 스레드에서 동시에 힙에 new 연산이 실행될것 같은데(예를 들어 c++ vector<> 같은..) 멀티스레드로 new 연산시 같은 주소에 생성될 일이 발생할 수도 있지 않을까 해서요 질문을 요약하자면 -지역변수에서 힙쪽의 new 를 생성하는게 있다면 그것은 스레드 세이프한가? 라는것이 질문입니다 답변 부탁드려요!
안녕하세요 영한님 강의 잘 듣고 있습니다^^ 전부터 궁금해 왔던 것인데요, 팩토리를 만들 때 정적으로 올리는 이유에 대해서 궁금합니다 영한님이 다른 QnA에서 추천해 주신 내용들을 읽어보았으나 굳이 왜 "정적"영역으로 보내는 가에 대한 의문은 쉽게 풀리지 않습니다 ㅜㅜ 일단 정적 팩토리 메서드로 보내면 생성자들에 대한 응집도가 크게 떨어지는 느낌입니다. "엘레강트 오브젝트"라는 책을 보면 생성자는 10~15개 까지도 만들고 퍼블릭 메서드를 최대한 적게 가져가라고 가이드를 주는데요, 정적 영역으로 보내면 주/부 생성자로 보낼 수 없기 때문에 그 많은 생성자들이 다 흩어지고, 생성자들 간 관계를 맺을 수 없기 때문에 유연성이 떨어지고 코드 중복이 자주 일어나는 효과가 나는 것 같습니다 이는 굳이 정적 영역으로 보내지 않고 주/부 생성자로 구분하면 쉽게 해결될 일이 아닌가? 하는 생각도 들어 질문을 드립니다
========================================= [질문 템플릿] 1. 강의 내용과 관련된 질문인가요? (예/아니오) 2. 인프런의 질문 게시판과 자주 하는 질문에 없는 내용인가요? (예/아니오) 3. 질문 잘하기 메뉴얼을 읽어보셨나요? (예/아니오) [질문 내용] 일대다[1:N] 강의의 16분 29초 쯤에 연관관계의 주인이 양쪽에 모두 있으면 망한다라는 언급이 있으신데, 순서가 꼬이거나 예측이 안된다는게 구체적으로 어떤 의미인지 예시가 있을까요? 정말 단순하게 생각하면 어쨋든 연관관계의 주인이 아닌 쪽에서 mappedby를 통해 읽기 전용으로 설정하지 않아도 Member에서 추가하나 Team에서 추가하나 반영될 수 있다면 오히려 좋지 않나 싶은 의구심이 들어서 질문드립니다 감사합니다 :)
안녕하세요, 좋은 강의를 올려주셔서 감사드립니다. 아래와 같은 두개의 IPv4 주소가 있다고 가정했을때, [1] 217.101.92.127 /25 [2] 217.101.92.127 /27 세가지의 의문점이 있습니다. 의문1) 총 32 bit의 전체 숫자는 같지만 [1]과 [2]는 network ID를 식별하고자 하는 bit의 수가 다르기 때문에 각각 다른 network 로 식별할 수 있는 것일까? 의문2) 만약 [1], [2]가 다른 network로 식별 된다면 [1], [2]의 전체 IPv4 주소는 같지만 [1], [2]는 다른 host로 식별 되는 것일까? 의문3) [1], [2]가 결국 다른 host로 식별 된다면 IPv4 주소체계에서 32bit 숫자로 배정 할 수 있는 host의 숫자는 2^32가 아니라 중복이 허용되기 때문에 훨씬더 많은 host를 배정할 수 있는 것일까? 항상 건강하시고 앞으로도 좋은 강의 부탁드립니다. 감사합니다.
안녕하세요. 싱글 코어와 멀티 코어에 대해 궁금한 점에 대해 질문드립니다. 1.만약 제가 작성한 프로그램에서 멀티 쓰레드를 사용하더라도 사용하는 컴퓨터의 CPU가 싱글 코어 일 경우쓰레드를 사용할 때 컨텍스트 스위칭이 일어나기 떄문에 멀티 쓰레드를 사용하는 건 의미가 없는 게 맞을까요? 2.반대로 멀티 코어인 컴퓨터에 단일 스레드 환경의 프로그램을 만들었을 경우 여러 코어를 사용하는 게 아닌 하나의 코어만 사용하게 되어 CPU의 성능을 제대로 활용 못하는 게 맞을까요? 실제 운영체제 환경에서는 제가 만든 프로그램 외 에도 백그라운드로 실행되는 프로그램들이 있어서 코어 하나만 사용하진 않겠지만 개념적으로 봤을 때 멀티 코어일 때 단일 쓰레드 환경의 프로그램이면 CPU 성능을 제대로 활용 못 하는 게 맞는 건지 궁금합니다.
[질문 템플릿] 1. 강의 내용과 관련된 질문인가요? 예 2. 인프런의 질문 게시판과 자주 하는 질문에 없는 내용인가요? 잘모르겠습니다 ㅎㅎ.. 3. 질문 잘하기 메뉴얼을 읽어보셨나요? 예 [질문 내용] 1. 데이터 삽입 순서 관련 질문 서버가 여러 대 있다고 가정했을 때, 각 서버에 하단의 이미지처럼 메모리에 50개씩 값을 올려둘 경우, DB에 들어가는 데이터가 순차적으로 안들어가지 않나요? 구체적으로 생각해보지는 않았지만, 순차적으로 데이터가 들어가지 않을 경우에 대한 이슈가 있지 않을까 싶어서 질문드립니다! 2. 중간에 비어있는 구간 관련 질문 위와 마찬가지로 서버가 여러 대 있고 각 서버마다 50개씩 메모리에 할당했다고 가정했을 때, 특정 서버가 죽게되면 죽은 서버의 메모리가 가지고있던 개수만큼의 공백이 생기지 않나요? (거의 그럴 일은 없겠지만) 서버가 시도때도없이 다운될 경우 아무리 Long 타입을 지정했음에도 수가 넘어가는 케이스가 생기지 않을까 싶습니다.
안녕하세요. 강의를 보고 블로그에 정리해보았는데 괜찮을지 여쭤봅니다. 정리한지는 꽤 되었지만.. 최근 문제가 될 것 같다는 댓글을 받아서 여쭤봅니다. https://azurealstn.tistory.com/123#comment14716519 위 글은 강의를 보고 정리한 글입니다. 이상한 요지가 조금이라도 발견하시면 바로 비공개로 하겠습니다! 감사합니다.
ReadOnlySpan<byte> s = new ReadOnlySpan<byte>(segment.Array, segment.Offset, segment.Count); 이 질이 오류가 난다고 강의에는 나오는데 유니티 2021.3.4 버전을 쓰고 있는데 오류가 나지않는건 유니티에서 사용하고 있는 C# 버전때문인가요? ReadOnlySpan 은 C# 버전 몇부터 유니티에서 지원하는건지 설명이 잘 안나오는것 같은데 어디서 알수 있을까요?
학습하는 분들께 도움이 되고, 더 좋은 답변을 드릴 수 있도록 질문전에 다음을 꼭 확인해주세요. 1. 강의 내용과 관련된 질문을 남겨주세요. 2. 인프런의 질문 게시판과 자주 하는 질문(링크)을 먼저 확인해주세요. (자주 하는 질문 링크: https://bit.ly/3fX6ygx) 3. 질문 잘하기 메뉴얼(링크)을 먼저 읽어주세요. (질문 잘하기 메뉴얼 링크: https://bit.ly/2UfeqCG) 질문 시에는 위 내용은 삭제하고 다음 내용을 남겨주세요. ========================================= [질문 템플릿] 1. 강의 내용과 관련된 질문인가요? (예/) 2. 인프런의 질문 게시판과 자주 하는 질문에 없는 내용인가요? (예/) 3. 질문 잘하기 메뉴얼을 읽어보셨나요? (예/) [질문 내용] 질문 1 ============================================ 별칭과 관련하여 영한님의 댓글을 찾아보던 도중 라는 글이 있습니다. 제가 이해한 바로는 1:N 이던 N:1 이던 1:1 이던 페치조인할때 별칭은 사용하지 않는것이 좋지만 페치 조인시 별칭을 사용했을때와 별칭을 사용하지 않았을때와 의 데이터가 일치한다면(정합성) 사용 할수 있다 이렇게 이해를 했는데 맞나요 ? 질문 2 ============================================ 페치조인시 1:N 에서 페이징을 사용할수 없는 이유는 페치조인의 메커니즘 자체가 1:N 이면 N 만큼 데이터를 다 가지고 있어야 하는데 ex) @OneToMany(mappedBy = "team") private List<Member> members = new ArrayList<>(); (Team 은 페치조인시 members 의 뻥튀기 된 데이터를 모두 가지고 있어야한다) 그런데 이때 페이징을 실행하면 뻥튀기된 데이터를 가지고 있을수가 없다. 그래서 JPA는 메모리에 모든 정보를 끌어모아 저장 시킨후 메모리에서 페이징 처리를 실행 하기 때문에 메모리 부족 현상이 나타날수 있다 이렇게 이해를 했는데 맞나요 ? (질문1,2) ======================질문3 페이징 처리를 위해 N:1 을 1:N 으로 바꿔서 페치조인을 하면 되는데 막상 이 쿼리를 디비에 실행해도 둘다 데이터가 각 3건씩 똑같이 나오는게 맞나요 ? (뻥튀기 가 일어나면 데이터가 더많아야 하는게 아닌가요 ? 1:n 조인이) 각각 1:N , N:1 페치조인 실행한 결과 [데이터 뻥튀기는 -> 데이터 베이스 쿼리는 동일하게 나오나, 자바 객체에서 뻥튀기 ->[중복] 현상이라고 생각하면 되는건가요 ??] 이 부분은 몆번을 봐도 햇갈리네요
