안녕하세요 저는 [빌드하고 실행하기] 강의를 따라서 빌드를 마치고, java -jar 명령어를 통해 웹사이트를 띄우려고 했습니다.java -jar hello-spring-0.0.1-SNAPSHOT.jar 명령어를 실행하였고, 실행이 된것을 확인할 수 있었습니다.하지만 강의처럼 웹사이트 화면은 뜨지 않았습니다. 제가 오류가 난건가요? 아니면 일단 실행은 된 것 같으니 정상실행된건가요?

http .authorizeRequests() .antMatchers("/user").hasRole("USER") .antMatchers("/admin").hasRole("ADMIN") .antMatchers("/admin/**").access("hasRole('ADMIN') or hasRole('SYS')") .antMatchers("/admin/**").hasAnyRole("ADMIN","SYS") .anyRequest() .authenticated(); http .formLogin(); http .sessionManagement() .maximumSessions(1) .maxSessionsPreventsLogin(true); http .logout() .logoutUrl("/logout");위 내용과 같이 설정 후 user 계정으로 [로그인 -> 로그아웃] 후로그인 시도시 아래와 같은 화면이 표시됩니다.디버깅 해보니 logout 후에도 기존 세션이 있어 기존 살아있고, 해당 세션과 세션아이디가 다르니 초과 오류를 반환하는 것으로 확인이 됩니다.Logout 후에도 세션이 남아있는 이유와 해결방법이 있을까요? 

안녕하세요. 강의를 열심히 들으려고 하는 한 직장인입니다. 해당 수업 (회원가입 컨트롤러) 를 듣는도중, SecurityConfig 파일 만드는 부분에서 WebSecurityConfigurerAdapter 가 deprecated 되었다고 extends가 안되고 있습니다. 저는 현재 스프링 시큐리티 버전을.. 6 버전대 사용중이에요. 정확히는 6.1.2 버전 사용하는것 같네요.. (이렇게 버전확인해도되는건지 몰르겠습니다..ㅠㅠ) 로그분석과,, 구글링을 좀 해본 결과, RequestMatchers(MvcRequestMatcher) orRequestMatchers(AntPathRequestMatcher) 의 패턴으로 사용을 해야한다고 해서,, 결국 소스를 수정하여. permitAll()은 해결하였습니다.그런데 강의에서 프로필 요청 url은 httpMethod중 get만 허용해야 하는 조건에서, mvcMatchers(HttpMethod.GET, "/profile/*").permitAll() 부분을 도무지 어떻게 대치해야할지를 모르겠습니다. 제가 현재 까지 작성한 소스 공유 드립니다. package com.studyolle.config; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.security.config.annotation.web.builders.HttpSecurity; import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity; import org.springframework.security.web.SecurityFilterChain; import org.springframework.security.web.servlet.util.matcher.MvcRequestMatcher; import org.springframework.web.servlet.handler.HandlerMappingIntrospector; @Configuration @EnableWebSecurity // 시큐리티 활성화 -> 기본 스프링 필터체인에 등록 public class SecurityConfig { @Bean SecurityFilterChain filterChain(HttpSecurity http, HandlerMappingIntrospector introspector) throws Exception { MvcRequestMatcher.Builder mvcMatcherBuilder = new MvcRequestMatcher.Builder(introspector); http.authorizeHttpRequests((requests) -> requests .requestMatchers( mvcMatcherBuilder.pattern("/"), mvcMatcherBuilder.pattern("/login"), mvcMatcherBuilder.pattern("/sign-up") ,mvcMatcherBuilder.pattern("/check-email"), mvcMatcherBuilder.pattern("/check-email-token"), mvcMatcherBuilder.pattern("/email-login") ,mvcMatcherBuilder.pattern("/check-email-login"), mvcMatcherBuilder.pattern("/login-link"), mvcMatcherBuilder.pattern("/profile/*") ).permitAll() .anyRequest().authenticated() ); return http.build(); } }   해결방안을 자세하게 알려주시면 감사하겠습니다. 시간이 지남에 따라 스프링 정책은 계속 deprecated 되는 것 같은데,,, 너무 나도 배울게 많다고 생각이 됩니다. 잠깐이라도 놓치면 개발의 세계와 너무 멀어지는 느낌이 드네요. 제가 많이 부족하여 따끔한 쓴소리도 같이 부탁드릴께요.  진심 열심히 하려고 노력중입니다.감사합니다. 빠른 답변 부탁드리겠습니다.

안녕하세요,프로버티 빈의 후처리기 도입 강의 내용 질문드립니다. 질문 :ServerPropeites에 @Component 자체가 없어도 되지 않나요??애초에 @Component 있어도 ComponentScan 대상이 아니라고 판단했습니다.. 패키지가 분리되어있다고 판단했습니다..아래 부분만 있어도 되는것 아닐까요? @Import(ServerProperties.class) public class TomcatWebServerConfig {

등록 id가 1번과 2번이 있었다가 2번을 삭제하고 다시 등록을 하면 id가 3번으로 등록이 됩니다. 제가 잘못한 걸까요..?? 아니면 혹시 원래 이렇게 돌아가도록 설정하신건가요??

학습하는 분들께 도움이 되고, 더 좋은 답변을 드릴 수 있도록 질문전에 다음을 꼭 확인해주세요.환경widows10gradlew.bat을 실행하고 build successful이 떳는데 build폴더 내에 libs 폴더가 존재하지 않습니다.강의의 경우에는 libs내에 있는 .jar파일을 이용한 빌드 방법을 알려주시는 것으로 생각되는데 window환경이라서 이름이 다른걸까요?

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)2. 인프런의 질문 게시판과 자주 하는 질문에 없는 내용인가요? (예/아니오)3. 질문 잘하기 메뉴얼을 읽어보셨나요? (예/아니오)[질문 내용]스프링 부트는 2.7.14이고 java 버전은 11입니다.맥 터미널 창에cd Spring intializr로 만든 프로젝트는 경로cd first-spring./gradlew build위 순서대로 터미널 창에 입력했더니 ./gradlew: Operation not permitted 오류가 뜨면서 빌드가 안됩니다. 어떻게 하면 될까요?추가로 강의에서 ll을 터미널 창에 입력하면 해당 폴더에 있는 파일들을 보여주는 것 같던데 저는 해봤는데 파일 목록이 안뜨네요ㅜㅜ

테스트 코드를 작성하였는데, NullPointerException이 발생합니다 ..        

안녕하세요 강의 열심히 듣고 있는 학생입니다.프로필도 제대로 설정이 되어있는 상태같은데 도서관관리 페이지에서도 기존 db에 있던 정보 그대로 끌고 오고 혹시나 해서 이름 삭제 후 서버를 재시작했는데도 삭제된 채로 그대로 반영이 되어있어서 메모리에 저장되는거같지 않은 것 같네요 ㅠ그리고 결정적으로 h2-console로 접속하고 url 입력 후 커넥트를 누르니 저런 오류가 뜨는거 보니 뭔가 적용이 제대로 안된거 같은데 어디서 무엇이 어떻게 문제가 있는지 판단하기가 어려워서 질문드립니다 ㅠ

안녕하십니까 영한님!!!잘만 되던 테스트코드가 어느 순간 아래와 같은 오류가 발생합니다. 해결방법들을 찾아보고 시도해보았지만 해결되지 않아 맨 아래에 구글 드라이브 코드 링크 남겨드립니다. java.lang.IllegalStateException: Failed to load ApplicationContext for [WebMergedContextConfiguration@6bc25ac2 testClass = spring.lectureA.service.MemberServiceTest, locations = [], classes = [spring.lectureA.LectureAApplication], contextInitializerClasses = [], activeProfiles = [], propertySourceLocations = [], propertySourceProperties = ["org.springframework.boot.test.context.SpringBootTestContextBootstrapper=true"], contextCustomizers = [org.springframework.boot.test.autoconfigure.actuate.observability.ObservabilityContextCustomizerFactory$DisableObservabilityContextCustomizer@1f, org.springframework.boot.test.autoconfigure.properties.PropertyMappingContextCustomizer@0, org.springframework.boot.test.autoconfigure.web.servlet.WebDriverContextCustomizerFactory$Customizer@6c130c45, org.springframework.boot.test.context.filter.ExcludeFilterContextCustomizer@20f5239f, org.springframework.boot.test.json.DuplicateJsonObjectContextCustomizerFactory$DuplicateJsonObjectContextCustomizer@2fd1433e, org.springframework.boot.test.mock.mockito.MockitoContextCustomizer@0, org.springframework.boot.test.web.client.TestRestTemplateContextCustomizer@3c73951, org.springframework.boot.test.context.SpringBootTestAnnotation@6788e070], resourceBasePath = "src/main/webapp", contextLoader = org.springframework.boot.test.context.SpringBootContextLoader, parent = null]at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:143)at org.springframework.test.context.support.DefaultTestContext.getApplicationContext(DefaultTestContext.java:127)at org.springframework.test.context.web.ServletTestExecutionListener.setUpRequestContextIfNecessary(ServletTestExecutionListener.java:191)at org.springframework.test.context.web.ServletTestExecutionListener.prepareTestInstance(ServletTestExecutionListener.java:130)at org.springframework.test.context.TestContextManager.prepareTestInstance(TestContextManager.java:241)at org.springframework.test.context.junit.jupiter.SpringExtension.postProcessTestInstance(SpringExtension.java:138)at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$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$9(NodeTestTask.java:139)at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:138)at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:95)at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.submit(SameThreadHierarchicalTestExecutorService.java:35)at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:57)at org.junit.platform.engine.support.hierarchical.HierarchicalTestEngine.execute(HierarchicalTestEngine.java:54)at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:147)at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:127)at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:90)at org.junit.platform.launcher.core.EngineExecutionOrchestrator.lambda$execute$0(EngineExecutionOrchestrator.java:55)at org.junit.platform.launcher.core.EngineExecutionOrchestrator.withInterceptedStreams(EngineExecutionOrchestrator.java:102)at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:54)at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:114)at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:86)at org.junit.platform.launcher.core.DefaultLauncherSession$DelegatingLauncher.execute(DefaultLauncherSession.java:86)at org.junit.platform.launcher.core.SessionPerRequestLauncher.execute(SessionPerRequestLauncher.java:53)at com.intellij.junit5.JUnit5IdeaTestRunner.startRunnerWithArgs(JUnit5IdeaTestRunner.java:57)at com.intellij.rt.junit.IdeaTestRunner$Repeater$1.execute(IdeaTestRunner.java:38)at com.intellij.rt.execution.junit.TestsRepeater.repeat(TestsRepeater.java:11)at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:35)at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:235)at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:54)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 java.lang.IllegalArgumentException: Unrecognized legacy hibernate.hbm2ddl.auto value : create-droat org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1770)at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:598)at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:520)at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:326)at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234)at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:324)at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:200)at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1155)at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:932)at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:608)at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:734)at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:436)at org.springframework.boot.SpringApplication.run(SpringApplication.java:312)at org.springframework.boot.test.context.SpringBootContextLoader.lambda$loadContext$3(SpringBootContextLoader.java:137)at org.springframework.util.function.ThrowingSupplier.get(ThrowingSupplier.java:58)at org.springframework.util.function.ThrowingSupplier.get(ThrowingSupplier.java:46)at org.springframework.boot.SpringApplication.withHook(SpringApplication.java:1406)at org.springframework.boot.test.context.SpringBootContextLoader$ContextLoaderHook.run(SpringBootContextLoader.java:545)at org.springframework.boot.test.context.SpringBootContextLoader.loadContext(SpringBootContextLoader.java:137)at org.springframework.boot.test.context.SpringBootContextLoader.loadContext(SpringBootContextLoader.java:108)at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContextInternal(DefaultCacheAwareContextLoaderDelegate.java:187)at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:119)... 72 moreCaused by: jakarta.persistence.PersistenceException: [PersistenceUnit: default] Unable to build Hibernate SessionFactory; nested exception is java.lang.IllegalArgumentException: Unrecognized legacy hibernate.hbm2ddl.auto value : create-droat org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory(AbstractEntityManagerFactoryBean.java:421)at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:396)at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.afterPropertiesSet(LocalContainerEntityManagerFactoryBean.java:352)at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1817)at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1766)... 93 moreCaused by: java.lang.IllegalArgumentException: Unrecognized legacy hibernate.hbm2ddl.auto value : create-droat org.hibernate.tool.schema.Action.interpretHbm2ddlSetting(Action.java:230)at org.hibernate.tool.schema.spi.SchemaManagementToolCoordinator$ActionGrouping.determineAutoSettingImpliedAction(SchemaManagementToolCoordinator.java:725)at org.hibernate.tool.schema.spi.SchemaManagementToolCoordinator$ActionGrouping.interpret(SchemaManagementToolCoordinator.java:733)at org.hibernate.boot.internal.MetadataImpl.shouldOrderTableColumns(MetadataImpl.java:480)at org.hibernate.boot.internal.MetadataImpl.orderColumns(MetadataImpl.java:400)at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:250)at org.hibernate.boot.internal.SessionFactoryBuilderImpl.build(SessionFactoryBuilderImpl.java:431)at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:1455)at org.springframework.orm.jpa.vendor.SpringHibernateJpaPersistenceProvider.createContainerEntityManagerFactory(SpringHibernateJpaPersistenceProvider.java:75)at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:376)at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory(AbstractEntityManagerFactoryBean.java:409)... 97 more  [수정]create-drop으로 바꾸어도 해결되지 않습니다구글드라이브 링크 남겨드립니다. 감사합니다.https://drive.google.com/file/d/1ZboNJYtcy5yXo5WNBIcKVaWVlfnxAEu4/view?usp=drive_link

 섹션 3 독립 실행형 서블릿 애플리케이션 > 서블릿 컨테이너 띄우기 강의를 듣고나서 든 생각입니다! 왜 Servlet을 써야만할까요? (왜 Spring은 Servlet을 선택한걸까요?)

안녕하세요스프링부트와 JPA 활용1 중 섹션1. 프로젝트 생성 강의를 듣고 있는데요.13:04 부분에 플러그인 롬복을 설치하시는데 앞쪽에서 스프링부트 스타터에서 롬복을 받고 빌드를 했는데 플러그인을 따로 설치해주어야 하는 이유가 뭔가요?빌드한 롬복과 플러그인에서 설치하는 롬복은 무슨 차이인지 어떻게 활용되는지 궁금합니다.

회원생성 부분에서 @PostMapping("/api/v2/members") public CreateMemberResponse saveMemberV2(@RequestBody @Valid CreateMemberRequest request) { Member member = new Member(); member.setName(request.getName()); Long id = memberService.join(member); return new CreateMemberResponse(id); }CreateMemberRequest 가 dto라고 설명하셨는데회원가입시 json값은 값 변경이 없는데 vo가 아닌가요?      

안녕하세요 강사님, 강의 잘 듣고있습니다.강의에서 updateName 메소드를 domain에 작성하였는데 그 이유가 궁금합니다. 다른 기능은 userrepository의 메소드를 활용하는 것 같은데 수정 기능은 다른 이유가 궁금합니다.감사합니다.

먼저 강의 잘 들었습니다.취준 중인데도 이해가 잘 돼서 좋습니다! 다름이 아니라 동시성 제어를 할 때 redis, kafka로도 해결할 수 있다는 것은 알겠습니다. 다만, Lock으로도 동시성 제어도 할 수 있지만 줄줄이 기다리기 때문에 선착순 쿠폰 같은 이슈에 대해서는 비관적 락을 걸 경우 100명까지 순차적으로 느리게 된다는 것으로 이해했는데 맞을까요? 제가 이해한 것이 맞다면 락을 사용하면 많이 느릴텐데 보통 어떤 경우에 락을 통해 동시성 제어를 하고, 어떤 경우에 카프카를 쓰시나요? 같은 경우라도 상황마다 다르겠지만.. 예시를 조금만 들어주실 수 있을까요? 잘 이해를 하지 못해서 질문 남깁니다감사합니다

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)2. 인프런의 질문 게시판과 자주 하는 질문에 없는 내용인가요? (예/아니오)3. 질문 잘하기 메뉴얼을 읽어보셨나요? (예/아니오)[질문 내용]여기에 질문 내용을 남겨주세요. 안녕하세요! h2접속하면 저렇게 member 테이블만 뜨고 생성이 안되어있습니다..ㅠ

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)2. 인프런의 질문 게시판과 자주 하는 질문에 없는 내용인가요? (예/아니오)3. 질문 잘하기 메뉴얼을 읽어보셨나요? 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\modules-2\files-2.1\com.fasterxml.jackson.core\jackson-annotations\2.13.5\136f77ab424f302c9e27230b4482e8000e142edf\jackson-annotations-2.13.5.jar;C:\Users\민규\.gradle\caches\modules-2\files-2.1\com.fasterxml.jackson.core\jackson-core\2.13.5\d07c97d3de9ea658caf1ff1809fd9de930a286a\jackson-core-2.13.5.jar;C:\Users\민규\.gradle\caches\modules-2\files-2.1\ch.qos.logback\logback-core\1.2.12\1d8e51a698b138065d73baefb4f94531faa323cb\logback-core-1.2.12.jar;C:\Users\민규\.gradle\caches\modules-2\files-2.1\org.apache.logging.log4j\log4j-api\2.17.2\f42d6afa111b4dec5d2aea0fe2197240749a4ea6\log4j-api-2.17.2.jar;C:\Users\민규\.gradle\caches\modules-2\files-2.1\com.h2database\h2\2.1.214\d5c2005c9e3279201e12d4776c948578b16bf8b2\h2-2.1.214.jar;C:\Users\민규\.gradle\caches\modules-2\files-2.1\com.sun.activation\jakarta.activation\1.2.2\74548703f9851017ce2f556066659438019e7eb5\jakarta.activation-1.2.2.jar" jpabook.jpashop.JpashopApplication. ____ _/\\ / ___'_ __ (_)_ _ \ \ \ \( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \\\/ ___)| |_)| | | | | || (_| | ) ) ) )' |____| .__|_| |_|_| |_\__, | / / / /=========|_|==============|___/=/_/_/_/:: Spring Boot :: (v2.7.14)2023-08-16 15:16:35.129 INFO 6060 --- [ main] jpabook.jpashop.JpashopApplication : Starting JpashopApplication using Java 11.0.18 on DESKTOP-R06VPME with PID 6060 (C:\Users\민규\OneDrive\바탕 화면\Study\jpashop\out\production\classes started by 민규 in C:\Users\민규\OneDrive\바탕 화면\Study\jpashop)2023-08-16 15:16:35.136 INFO 6060 --- [ main] jpabook.jpashop.JpashopApplication : No active profile set, falling back to 1 default profile: "default"2023-08-16 15:16:36.872 INFO 6060 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data JPA repositories in DEFAULT mode.2023-08-16 15:16:36.903 INFO 6060 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 14 ms. Found 0 JPA repository interfaces.2023-08-16 15:16:38.080 INFO 6060 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http)2023-08-16 15:16:38.094 INFO 6060 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]2023-08-16 15:16:38.094 INFO 6060 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.78]2023-08-16 15:16:38.273 INFO 6060 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext2023-08-16 15:16:38.273 INFO 6060 --- [ main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 2995 ms2023-08-16 15:16:38.545 INFO 6060 --- [ main] o.hibernate.jpa.internal.util.LogHelper : HHH000204: Processing PersistenceUnitInfo [name: default]2023-08-16 15:16:38.624 INFO 6060 --- [ main] org.hibernate.Version : HHH000412: Hibernate ORM core version 5.6.15.Final2023-08-16 15:16:38.916 INFO 6060 --- [ main] o.hibernate.annotations.common.Version : HCANN000001: Hibernate Commons Annotations {5.1.2.Final}2023-08-16 15:16:39.035 INFO 6060 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Starting...2023-08-16 15:16:39.190 INFO 6060 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Start completed.2023-08-16 15:16:39.228 INFO 6060 --- [ main] org.hibernate.dialect.Dialect : HHH000400: Using dialect: org.hibernate.dialect.H2Dialect2023-08-16 15:16:39.542 ERROR 6060 --- [ main] j.LocalContainerEntityManagerFactoryBean : Failed to initialize JPA EntityManagerFactory: Illegal attempt to map a non collection as a @OneToMany, @ManyToMany or @CollectionOfElements: jpabook.jpashop.domain.Order.member2023-08-16 15:16:39.543 WARN 6060 --- [ main] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaConfiguration.class]: Invocation of init method failed; nested exception is org.hibernate.AnnotationException: Illegal attempt to map a non collection as a @OneToMany, @ManyToMany or @CollectionOfElements: jpabook.jpashop.domain.Order.member2023-08-16 15:16:39.543 INFO 6060 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Shutdown initiated...2023-08-16 15:16:39.560 INFO 6060 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Shutdown completed.2023-08-16 15:16:39.565 INFO 6060 --- [ main] o.apache.catalina.core.StandardService : Stopping service [Tomcat]2023-08-16 15:16:39.582 INFO 6060 --- [ main] ConditionEvaluationReportLoggingListener :Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.2023-08-16 15:16:39.615 ERROR 6060 --- [ main] o.s.boot.SpringApplication : Application run failedorg.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaConfiguration.class]: Invocation of init method failed; nested exception is org.hibernate.AnnotationException: Illegal attempt to map a non collection as a @OneToMany, @ManyToMany or @CollectionOfElements: jpabook.jpashop.domain.Order.memberat org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1804) ~[spring-beans-5.3.29.jar:5.3.29]at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:620) ~[spring-beans-5.3.29.jar:5.3.29]at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542) ~[spring-beans-5.3.29.jar:5.3.29]at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) ~[spring-beans-5.3.29.jar:5.3.29]at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.29.jar:5.3.29]at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.29.jar:5.3.29]at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.29.jar:5.3.29]at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1157) ~[spring-context-5.3.29.jar:5.3.29]at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:911) ~[spring-context-5.3.29.jar:5.3.29]at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:583) ~[spring-context-5.3.29.jar:5.3.29]at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:147) ~[spring-boot-2.7.14.jar:2.7.14]at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:731) ~[spring-boot-2.7.14.jar:2.7.14]at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:408) ~[spring-boot-2.7.14.jar:2.7.14]at org.springframework.boot.SpringApplication.run(SpringApplication.java:307) ~[spring-boot-2.7.14.jar:2.7.14]at org.springframework.boot.SpringApplication.run(SpringApplication.java:1303) ~[spring-boot-2.7.14.jar:2.7.14]at org.springframework.boot.SpringApplication.run(SpringApplication.java:1292) ~[spring-boot-2.7.14.jar:2.7.14]at jpabook.jpashop.JpashopApplication.main(JpashopApplication.java:11) ~[classes/:na]Caused by: org.hibernate.AnnotationException: Illegal attempt to map a non collection as a @OneToMany, @ManyToMany or @CollectionOfElements: jpabook.jpashop.domain.Order.memberat org.hibernate.cfg.annotations.CollectionBinder.getCollectionBinder(CollectionBinder.java:325) ~[hibernate-core-5.6.15.Final.jar:5.6.15.Final]at org.hibernate.cfg.AnnotationBinder.processElementAnnotations(AnnotationBinder.java:1977) ~[hibernate-core-5.6.15.Final.jar:5.6.15.Final]at org.hibernate.cfg.AnnotationBinder.processIdPropertiesIfNotAlready(AnnotationBinder.java:968) ~[hibernate-core-5.6.15.Final.jar:5.6.15.Final]at org.hibernate.cfg.AnnotationBinder.bindClass(AnnotationBinder.java:793) ~[hibernate-core-5.6.15.Final.jar:5.6.15.Final]at org.hibernate.boot.model.source.internal.annotations.AnnotationMetadataSourceProcessorImpl.processEntityHierarchies(AnnotationMetadataSourceProcessorImpl.java:225) ~[hibernate-core-5.6.15.Final.jar:5.6.15.Final]at org.hibernate.boot.model.process.spi.MetadataBuildingProcess$1.processEntityHierarchies(MetadataBuildingProcess.java:239) ~[hibernate-core-5.6.15.Final.jar:5.6.15.Final]at org.hibernate.boot.model.process.spi.MetadataBuildingProcess.complete(MetadataBuildingProcess.java:282) ~[hibernate-core-5.6.15.Final.jar:5.6.15.Final]at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.metadata(EntityManagerFactoryBuilderImpl.java:1460) ~[hibernate-core-5.6.15.Final.jar:5.6.15.Final]at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:1494) ~[hibernate-core-5.6.15.Final.jar:5.6.15.Final]at org.springframework.orm.jpa.vendor.SpringHibernateJpaPersistenceProvider.createContainerEntityManagerFactory(SpringHibernateJpaPersistenceProvider.java:58) ~[spring-orm-5.3.29.jar:5.3.29]at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:365) ~[spring-orm-5.3.29.jar:5.3.29]at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory(AbstractEntityManagerFactoryBean.java:409) ~[spring-orm-5.3.29.jar:5.3.29]at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:396) ~[spring-orm-5.3.29.jar:5.3.29]at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.afterPropertiesSet(LocalContainerEntityManagerFactoryBean.java:341) ~[spring-orm-5.3.29.jar:5.3.29]at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1863) ~[spring-beans-5.3.29.jar:5.3.29]at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1800) ~[spring-beans-5.3.29.jar:5.3.29]... 16 common frames omittedProcess finished with exit code 1main메소드실행하면 이렇게 뜨고 종료 됩니다 h2 서버에 테이블도 안 만들어져요http://naver.me/x6ABJK1o <- domain 파일 주소

도서관 애플리케이션을 실행하는 도중 아래와 같은 긴 오류가 떴습니다. 검색을 해도 잘 모르겠습니다 ㅠ어떻게 해야 할까요? Error executing DDL "drop table if exists user cascade " via JDBC StatementCaused by: org.h2.jdbc.JdbcSQLSyntaxErrorException: Syntax error in SQL statement "drop table if exists [*]user cascade "; expected "identifier"; SQL statement:Error executing DDL "create table user (id bigint generated by default as identity, age integer, name varchar(20) not null, primary key (id))" via JDBC StatementCaused by: org.h2.jdbc.JdbcSQLSyntaxErrorException: Syntax error in SQL statement "create table [*]user (id bigint generated by default as identity, age integer, name varchar(20) not null, primary key (id))"; expected "identifier"; SQL statement:Error executing DDL "alter table if exists user_loan_history add constraint FKa17jbf1po26eytdyvyj73b4rw foreign key (user_id) references user" via JDBC StatementCaused by: org.h2.jdbc.JdbcSQLSyntaxErrorException: Syntax error in SQL statement "alter table if exists user_loan_history add constraint FKa17jbf1po26eytdyvyj73b4rw foreign key (user_id) references [*]user"; expected "identifier"; SQL statement: 

zookeeper의 경우D:\{home}\kafka_2.13-2.7.0>bin\windows\zookeeper-server-start.bat config\zookeeper.properties이대로 실행하면 아래 파바박 뜨면서 tmp에 zookeeper 폴더도 잘 만들어 지는데kafka는D:\{home}\kafka_2.13-2.7.0>bin\windows\kafka-server-start.bat config\server.properties아무것도 안뜨고 그냥 D:\{home}\kafka_2.13-2.7.0>으로 넘어갑니다 tmp에 폴더도 안 만들어지고요. 딱히 에러가 발생하지도 않습니다. java는 jdk 11.0.2사용 중이고 버전에 문제 없어 보이는데 왜 이러는 걸까요?

fetchtype을 LAZY로 설정했을 경우 N+1문제는 이해했습니다. 그런데 EAGER의 경우 Order를 위한 1개의 select쿼리 뒤에 delivery를 위한 1개의 쿼리와 3중 조인문 2개의 쿼리가 나가고 있는데 (위 사진) join문이 EAGER처리를 위한 쿼리라면 왜 order 조회쿼리 뒤에 바로 나가지 않고 delivery 조회쿼리가 한번 나간 뒤에 나가는건지 왜 delivery에 대한 추가 쿼리는 나가는데 member는 조회쿼리가 나가지 않고 join문이 나가는지 EAGER의 경우에도 모든 연관객체가 영속성 콘텍스트 안에 존재하지 않는다면 정확히 1+N개의 쿼리가 나가는지 (=LAZY와 똑같이 1+N개의 쿼리가 나가는지) 이 세가지가 이해되지 않습니다.EAGER일때 쿼리를 이해해보려고 노력했는데 "LAZY와는 추가쿼리(N)가 나가는 시점의 차이가 있다" 정도 말고는 이해가 되지 않아 질문드립니다.