TryPop() 내부에서 oldHead를 이미 분리해 낸 후인데 왜 또 TryDelete()를 통해 체크하는지 이해가 안됩니다 CAS를 빠져나왔다는건 oldHead가 stack에서 분리되어 자유로워졌다는거 아닌가요?   그리고 LockFreeStack 첫번째 방법에서 DeleteNodes는 왜 혼자 static으로 만드는지도 궁금합니다

github: billaa@naver.com 인프런 아이디: billaa@naver.com   주말동안 빨리 들어야하는데 ㅠㅠㅠ.................................제발 빨리 승인해주세요..........................

기존에 생각하셨던 전체 애플리케이션 구성에 대해 궁금한점이 있어 질문드립니다.(2분 37초)   1. 원래 구상하셨던 전체 애플리케이션 구성의 경우 ingress controller nginx를 활용하여 데이터를 처리하는것으로 보여지는데요 별도로 spring cloud gateway 는 없이 진행하려 하셨던걸까요?   그렇다면 인증은 각 서비스(catalog, user, order)에서 인증서버등을 통해 자체적으로 이뤄지는걸까요?     2. 쿠버네티스를 사용하는 현업에서 spring cloud를 활용하여 msa 환경으로 구축할 경우 데이터 수신부(gateway, ingress controller)를 어떤방식으로 구성하는지 조금이나마 알려주시면 감사하겠습니다.   뒷부분을 아직 수강중이라 질문이 조금 부족할 수 있을거라 생각됩니다 ㅠ 천천히 답변주시면 감사하겠습니다.    

안녕하세요 강의를 잘 보고 있는 수강생입니다.   import pickle for i in range(1,51):     with open("{0}주차.txt", "w", encoding="utf8".format(i)) as report:     report.write("- {0} 주차 주간보고 -\n부서 : \n이름 : \n업무 요약: ".format(i))     퀴즈에서 with 문에 format를 사용해서 했는데 안되던데 그 이유가 with문은 str 형태라서 사용을 못하는건가요?   만약에 with 문에 전체가 str 형태라면 format 사용 가능한가요?   답변 부탁드리겠습니다. 강의 너무 잘 듣고 있습니다!    

오류가 발생하는데 도저히 못찾겠어서 질문드립니다.. ㅠㅠ prepare statement를 찾을수 없다는데 어떻게 해야하나요...ㅠㅠ   javax.persistence.PersistenceException: org.hibernate.exception.SQLGrammarException: could not prepare statement at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:154) at org.hibernate.query.internal.AbstractProducedQuery.list(AbstractProducedQuery.java:1613) at org.hibernate.query.Query.getResultList(Query.java:165) at hello.hellospring.repository.JpaMemberRepository.findByName(JpaMemberRepository.java:25) at hello.hellospring.service.MemberService.validateDuplicateMember(MemberService.java:38) at hello.hellospring.service.MemberService.join(MemberService.java:32) at hello.hellospring.service.MemberService$$FastClassBySpringCGLIB$$530c61b7.invoke(<generated>) at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218) at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:779) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163) at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:750) at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:123) at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:388) at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:119) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:750) at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:692) at hello.hellospring.service.MemberService$$EnhancerBySpringCGLIB$$fca9be2d.join(<generated>) at hello.hellospring.service.MemberServiceIntegrationTest.회원가입(MemberServiceIntegrationTest.java:32) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:566) at org.junit.platform.commons.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:688) at org.junit.jupiter.engine.execution.MethodInvocation.proceed(MethodInvocation.java:60) at org.junit.jupiter.engine.execution.InvocationInterceptorChain$ValidatingInvocation.proceed(InvocationInterceptorChain.java:131) at org.junit.jupiter.engine.extension.TimeoutExtension.intercept(TimeoutExtension.java:149) at org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestableMethod(TimeoutExtension.java:140) at org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestMethod(TimeoutExtension.java:84) at org.junit.jupiter.engine.execution.ExecutableInvoker$ReflectiveInterceptorCall.lambda$ofVoidMethod$0(ExecutableInvoker.java:115) at org.junit.jupiter.engine.execution.ExecutableInvoker.lambda$invoke$0(ExecutableInvoker.java:105) at org.junit.jupiter.engine.execution.InvocationInterceptorChain$InterceptedInvocation.proceed(InvocationInterceptorChain.java:106) at org.junit.jupiter.engine.execution.InvocationInterceptorChain.proceed(InvocationInterceptorChain.java:64) at org.junit.jupiter.engine.execution.InvocationInterceptorChain.chainAndInvoke(InvocationInterceptorChain.java:45) at org.junit.jupiter.engine.execution.InvocationInterceptorChain.invoke(InvocationInterceptorChain.java:37) at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:104) at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:98) at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$invokeTestMethod$6(TestMethodTestDescriptor.java:210) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.invokeTestMethod(TestMethodTestDescriptor.java:206) at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:131) at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:65) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:139) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:129) at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:127) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:126) at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:84) at java.base/java.util.ArrayList.forEach(ArrayList.java:1541) at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:143) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:129) at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:127) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:126) at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:84) at java.base/java.util.ArrayList.forEach(ArrayList.java:1541) at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:143) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:129) at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:127) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:126) at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:84) at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.submit(SameThreadHierarchicalTestExecutorService.java:32) at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:57) at org.junit.platform.engine.support.hierarchical.HierarchicalTestEngine.execute(HierarchicalTestEngine.java:51) at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:108) at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:88) at org.junit.platform.launcher.core.EngineExecutionOrchestrator.lambda$execute$0(EngineExecutionOrchestrator.java:54) at org.junit.platform.launcher.core.EngineExecutionOrchestrator.withInterceptedStreams(EngineExecutionOrchestrator.java:67) at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:52) at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:96) at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:75) at com.intellij.junit5.JUnit5IdeaTestRunner.startRunnerWithArgs(JUnit5IdeaTestRunner.java:71) at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33) at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:235) at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:54) Caused by: org.hibernate.exception.SQLGrammarException: could not prepare statement at org.hibernate.exception.internal.SQLExceptionTypeDelegate.convert(SQLExceptionTypeDelegate.java:63) at org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:42) at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:113) at org.hibernate.engine.jdbc.internal.StatementPreparerImpl$StatementPreparationTemplate.prepareStatement(StatementPreparerImpl.java:186) at org.hibernate.engine.jdbc.internal.StatementPreparerImpl.prepareQueryStatement(StatementPreparerImpl.java:151) at org.hibernate.loader.Loader.prepareQueryStatement(Loader.java:2097) at org.hibernate.loader.Loader.executeQueryStatement(Loader.java:2034) at org.hibernate.loader.Loader.executeQueryStatement(Loader.java:2012) at org.hibernate.loader.Loader.doQuery(Loader.java:948) at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:349) at org.hibernate.loader.Loader.doList(Loader.java:2843) at org.hibernate.loader.Loader.doList(Loader.java:2825) at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2657) at org.hibernate.loader.Loader.list(Loader.java:2652) at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:506) at org.hibernate.hql.internal.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:400) at org.hibernate.engine.query.spi.HQLQueryPlan.performList(HQLQueryPlan.java:219) at org.hibernate.internal.SessionImpl.list(SessionImpl.java:1414) at org.hibernate.query.internal.AbstractProducedQuery.doList(AbstractProducedQuery.java:1636) at org.hibernate.query.internal.AbstractProducedQuery.list(AbstractProducedQuery.java:1604) ... 82 more Caused by: org.h2.jdbc.JdbcSQLSyntaxErrorException: Column "MEMBER0_.USERNAME" not found; SQL statement: select member0_.id as id1_0_, member0_.username as username2_0_ from member member0_ where member0_.username=? [42122-200] at org.h2.message.DbException.getJdbcSQLException(DbException.java:453) at org.h2.message.DbException.getJdbcSQLException(DbException.java:429) at org.h2.message.DbException.get(DbException.java:205) at org.h2.message.DbException.get(DbException.java:181) at org.h2.expression.ExpressionColumn.getColumnException(ExpressionColumn.java:163) at org.h2.expression.ExpressionColumn.optimize(ExpressionColumn.java:145) at org.h2.expression.Alias.optimize(Alias.java:52) at org.h2.command.dml.Select.prepare(Select.java:1206) at org.h2.command.Parser.prepareCommand(Parser.java:744) at org.h2.engine.Session.prepareLocal(Session.java:657) at org.h2.server.TcpServerThread.process(TcpServerThread.java:278) at org.h2.server.TcpServerThread.run(TcpServerThread.java:183) at java.base/java.lang.Thread.run(Thread.java:834) at org.h2.message.DbException.getJdbcSQLException(DbException.java:453) at org.h2.engine.SessionRemote.done(SessionRemote.java:611) at org.h2.command.CommandRemote.prepare(CommandRemote.java:85) at org.h2.command.CommandRemote.<init>(CommandRemote.java:51) at org.h2.engine.SessionRemote.prepareCommand(SessionRemote.java:481) at org.h2.jdbc.JdbcConnection.prepareCommand(JdbcConnection.java:1235) at org.h2.jdbc.JdbcPreparedStatement.<init>(JdbcPreparedStatement.java:76) at org.h2.jdbc.JdbcConnection.prepareStatement(JdbcConnection.java:352) at com.zaxxer.hikari.pool.ProxyConnection.prepareStatement(ProxyConnection.java:337) at com.zaxxer.hikari.pool.HikariProxyConnection.prepareStatement(HikariProxyConnection.java) at org.hibernate.engine.jdbc.internal.StatementPreparerImpl$5.doPrepare(StatementPreparerImpl.java:149) at org.hibernate.engine.jdbc.internal.StatementPreparerImpl$StatementPreparationTemplate.prepareStatement(StatementPreparerImpl.java:176) ... 98 more 2021-10-30 19:34:28.902 INFO 31588 --- [ionShutdownHook] j.LocalContainerEntityManagerFactoryBean : Closing JPA EntityManagerFactory for persistence unit 'default' 2021-10-30 19:34:28.906 INFO 31588 --- [ionShutdownHook] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Shutdown initiated... 2021-10-30 19:34:28.919 INFO 31588 --- [ionShutdownHook] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Shutdown completed. Process finished with exit code -1

안녕하세요 선생님.   스크롤 높이 세팅 강의의 4:33분에서 전역변수가 되지 않게 하기 위해 즉시호출 함수를 실행하게 한다고 해주셨는데요,   그럼 혹시 디버깅 등을 위해서 콘솔에서 (()=>{})(); 안의 변수의 값을 확인하고 싶을 때는 어떻게 할 수 있나요??   + 추후 수업을 들으면서, function 자체내에 console.log를 넣으면 되는 부분을 알게되었습니다. 감사합니다.

오류가 발생하는데 도저히 못찾겠어서 질문드립니다.. ㅠㅠ prepare statement를 찾을수 없다는데 어떻게 해야하나요...ㅠㅠ   javax.persistence.PersistenceException: org.hibernate.exception.SQLGrammarException: could not prepare statement at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:154) at org.hibernate.query.internal.AbstractProducedQuery.list(AbstractProducedQuery.java:1613) at org.hibernate.query.Query.getResultList(Query.java:165) at hello.hellospring.repository.JpaMemberRepository.findByName(JpaMemberRepository.java:25) at hello.hellospring.service.MemberService.validateDuplicateMember(MemberService.java:38) at hello.hellospring.service.MemberService.join(MemberService.java:32) at hello.hellospring.service.MemberService$$FastClassBySpringCGLIB$$530c61b7.invoke(<generated>) at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218) at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:779) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163) at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:750) at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:123) at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:388) at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:119) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:750) at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:692) at hello.hellospring.service.MemberService$$EnhancerBySpringCGLIB$$fca9be2d.join(<generated>) at hello.hellospring.service.MemberServiceIntegrationTest.회원가입(MemberServiceIntegrationTest.java:32) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:566) at org.junit.platform.commons.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:688) at org.junit.jupiter.engine.execution.MethodInvocation.proceed(MethodInvocation.java:60) at org.junit.jupiter.engine.execution.InvocationInterceptorChain$ValidatingInvocation.proceed(InvocationInterceptorChain.java:131) at org.junit.jupiter.engine.extension.TimeoutExtension.intercept(TimeoutExtension.java:149) at org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestableMethod(TimeoutExtension.java:140) at org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestMethod(TimeoutExtension.java:84) at org.junit.jupiter.engine.execution.ExecutableInvoker$ReflectiveInterceptorCall.lambda$ofVoidMethod$0(ExecutableInvoker.java:115) at org.junit.jupiter.engine.execution.ExecutableInvoker.lambda$invoke$0(ExecutableInvoker.java:105) at org.junit.jupiter.engine.execution.InvocationInterceptorChain$InterceptedInvocation.proceed(InvocationInterceptorChain.java:106) at org.junit.jupiter.engine.execution.InvocationInterceptorChain.proceed(InvocationInterceptorChain.java:64) at org.junit.jupiter.engine.execution.InvocationInterceptorChain.chainAndInvoke(InvocationInterceptorChain.java:45) at org.junit.jupiter.engine.execution.InvocationInterceptorChain.invoke(InvocationInterceptorChain.java:37) at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:104) at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:98) at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$invokeTestMethod$6(TestMethodTestDescriptor.java:210) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.invokeTestMethod(TestMethodTestDescriptor.java:206) at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:131) at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:65) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:139) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:129) at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:127) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:126) at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:84) at java.base/java.util.ArrayList.forEach(ArrayList.java:1541) at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:143) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:129) at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:127) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:126) at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:84) at java.base/java.util.ArrayList.forEach(ArrayList.java:1541) at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:143) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:129) at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:127) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:126) at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:84) at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.submit(SameThreadHierarchicalTestExecutorService.java:32) at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:57) at org.junit.platform.engine.support.hierarchical.HierarchicalTestEngine.execute(HierarchicalTestEngine.java:51) at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:108) at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:88) at org.junit.platform.launcher.core.EngineExecutionOrchestrator.lambda$execute$0(EngineExecutionOrchestrator.java:54) at org.junit.platform.launcher.core.EngineExecutionOrchestrator.withInterceptedStreams(EngineExecutionOrchestrator.java:67) at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:52) at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:96) at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:75) at com.intellij.junit5.JUnit5IdeaTestRunner.startRunnerWithArgs(JUnit5IdeaTestRunner.java:71) at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33) at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:235) at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:54) Caused by: org.hibernate.exception.SQLGrammarException: could not prepare statement at org.hibernate.exception.internal.SQLExceptionTypeDelegate.convert(SQLExceptionTypeDelegate.java:63) at org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:42) at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:113) at org.hibernate.engine.jdbc.internal.StatementPreparerImpl$StatementPreparationTemplate.prepareStatement(StatementPreparerImpl.java:186) at org.hibernate.engine.jdbc.internal.StatementPreparerImpl.prepareQueryStatement(StatementPreparerImpl.java:151) at org.hibernate.loader.Loader.prepareQueryStatement(Loader.java:2097) at org.hibernate.loader.Loader.executeQueryStatement(Loader.java:2034) at org.hibernate.loader.Loader.executeQueryStatement(Loader.java:2012) at org.hibernate.loader.Loader.doQuery(Loader.java:948) at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:349) at org.hibernate.loader.Loader.doList(Loader.java:2843) at org.hibernate.loader.Loader.doList(Loader.java:2825) at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2657) at org.hibernate.loader.Loader.list(Loader.java:2652) at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:506) at org.hibernate.hql.internal.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:400) at org.hibernate.engine.query.spi.HQLQueryPlan.performList(HQLQueryPlan.java:219) at org.hibernate.internal.SessionImpl.list(SessionImpl.java:1414) at org.hibernate.query.internal.AbstractProducedQuery.doList(AbstractProducedQuery.java:1636) at org.hibernate.query.internal.AbstractProducedQuery.list(AbstractProducedQuery.java:1604) ... 82 more Caused by: org.h2.jdbc.JdbcSQLSyntaxErrorException: Column "MEMBER0_.USERNAME" not found; SQL statement: select member0_.id as id1_0_, member0_.username as username2_0_ from member member0_ where member0_.username=? [42122-200] at org.h2.message.DbException.getJdbcSQLException(DbException.java:453) at org.h2.message.DbException.getJdbcSQLException(DbException.java:429) at org.h2.message.DbException.get(DbException.java:205) at org.h2.message.DbException.get(DbException.java:181) at org.h2.expression.ExpressionColumn.getColumnException(ExpressionColumn.java:163) at org.h2.expression.ExpressionColumn.optimize(ExpressionColumn.java:145) at org.h2.expression.Alias.optimize(Alias.java:52) at org.h2.command.dml.Select.prepare(Select.java:1206) at org.h2.command.Parser.prepareCommand(Parser.java:744) at org.h2.engine.Session.prepareLocal(Session.java:657) at org.h2.server.TcpServerThread.process(TcpServerThread.java:278) at org.h2.server.TcpServerThread.run(TcpServerThread.java:183) at java.base/java.lang.Thread.run(Thread.java:834) at org.h2.message.DbException.getJdbcSQLException(DbException.java:453) at org.h2.engine.SessionRemote.done(SessionRemote.java:611) at org.h2.command.CommandRemote.prepare(CommandRemote.java:85) at org.h2.command.CommandRemote.<init>(CommandRemote.java:51) at org.h2.engine.SessionRemote.prepareCommand(SessionRemote.java:481) at org.h2.jdbc.JdbcConnection.prepareCommand(JdbcConnection.java:1235) at org.h2.jdbc.JdbcPreparedStatement.<init>(JdbcPreparedStatement.java:76) at org.h2.jdbc.JdbcConnection.prepareStatement(JdbcConnection.java:352) at com.zaxxer.hikari.pool.ProxyConnection.prepareStatement(ProxyConnection.java:337) at com.zaxxer.hikari.pool.HikariProxyConnection.prepareStatement(HikariProxyConnection.java) at org.hibernate.engine.jdbc.internal.StatementPreparerImpl$5.doPrepare(StatementPreparerImpl.java:149) at org.hibernate.engine.jdbc.internal.StatementPreparerImpl$StatementPreparationTemplate.prepareStatement(StatementPreparerImpl.java:176) ... 98 more 2021-10-30 19:34:28.902 INFO 31588 --- [ionShutdownHook] j.LocalContainerEntityManagerFactoryBean : Closing JPA EntityManagerFactory for persistence unit 'default' 2021-10-30 19:34:28.906 INFO 31588 --- [ionShutdownHook] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Shutdown initiated... 2021-10-30 19:34:28.919 INFO 31588 --- [ionShutdownHook] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Shutdown completed. Process finished with exit code -1  

sql_practice 에서 받은파일을 디벨로퍼에 전부다 추가하고 커밋하고 다한상태인데 저장한 테이블을 불러오니까 한글파일이 꺠져서 보이네요 인코딩은 utf-8로하고 계속 구글링을해봤는데 해결이안되네요ㅜㅜKO16MSWIN949 이것도 잘되있는데 왜그런지모르겠네요

안녕하세요. 딥러닝호형님 강의 유익하게 잘 보고 있습니다. optimizer.zero_grad() 관련 질문 드립니다.   1. 각 epoch마다 gradient를 초기화하는게 아니라 각 iteration마다 gradient를 초기화해주는 이유는 무엇인가요? 전체 데이터를 한번 다 돌고 난 뒤에 gradient를 초기화하는 것이 아니라, 각 미니배치마다 gradient를 초기화해서 새롭게 학습해야 하는 것인가요?    2. model.zero_grad()와 optimizer.zero_grad()의 차이는 무엇인가요?    그럼 답변 기다리겠습니다. 감사합니다! 

안녕하세요! 패키지 설치 오류로 며칠 째 고생하다가 결국 이렇게 질문합니다 ㅠㅠ   install.packages('caret')을 실행하니 이 전에는 recipes 설치 실패가 뜨다가 이제 설치는 되는데 library(caret)을 실행시키면 아래와 같은 오류가 뜨며 preProcess 함수를 찾지 못합니다.   ipred 0.9.12 windows 버전 소스 zip 파일을 수동으로 설치했는데도 불구하고 이 오류가 계속 됩니다... 해결방안이 있을까요?     에러: package or namespace load failed for ‘caret’ in loadNamespace(j <- i[[1L]], c(lib.loc, .libPaths()), versionCheck = vI[[j]]): 네임스페이스 ‘ipred’ 0.9-11는 이미 로드되었으나 >= 0.9.12가 필요합니다 추가정보: 경고메시지(들): 패키지 ‘caret’는 R 버전 3.6.3에서 작성

안녕하세요. 강사님, 수강생입니다. 강의듣다가 , 결과가 강사님과 다르게 나오는데, 소스위치가. https://github.com/onjsd...=> 여기 아닌가요 ?   * JobRepositoryConfiguration 여길 따라하고 잇는데,    JobExecution lastJobExecution = jobRepository.getLastJobExecution(jobName, jobParameters); 실행하면, lastJobExecution  값이 null 로 나와서.. 강의소스 따라해보려고 합니다  

안녕하세요!    객체지향과 디자인패턴 - 최범균 님 책을 읽고 여기까지 왔네요! ㅎㅎㅎ   복습하기 좋은 강의였습니다.   다만, DIP 에서 조금 헷갈리는게 있는데요. 하나의 예를들면서 여쭤보고 싶습니다.   Controller 와 Service가 있다고 하면 Controller 에서 Service 를 의존하고 있을 때, Service의 구체적인  구현체를 Controller 에서 의존하고 있기에 이것은 Controller ( 고모듈 ) 이 Service (저모듈 ) 을 의존하고 있는 거잖아요.?   그럼 여기서 Controller 와 Service 사이에 Interface를 둬서 Controller에서는 ServiceInterface의 고수준 모듈을 의존하고 ServiceInterface를 상속한 저모듈 구현체는 상속을 한 Interface ( 고수준 ) 에 의존 되어있기에 딱 좋은 예제라고 생각하는데 맞을까요?! 감사합니다.    

3:20 영상에서는 dispatch에서 addPost라는 함수에 text를 넘겨주고 사가에서받는 함수의 이름도 addPost인데   8:35영상에서는 addComment 사가에서 어떻게 해당 data를 받는건지 이해가안됩니다.ㅠㅠ 왼쪽화면에서 TYPE이 ADD_COMMENT_REQUEST라 오른쪽에서 화면 takeLatest에 해당 type의 액션이 있어서  addComment에서 받은것인가요 ?

제가 현재 비주얼스튜디오 2019를 사용하고 있습니다. macro에 xalloc이라고 작성하면 오류가 나서 Xalloc으로 이름을 변경하고 사용하니깐 빌드가 잘 되더라구요.    혹시 이름 변경하고 실습을 진행해도 될지 질문드립니다!      

이번에 PolynomialFeatures에 대해서 설명해 주셔서 감사합니다.   궁금증이 있어 질문 드립니다.   1. 혹시 feature 데이터 셋을 만들때, 범주형 데이터가 포함된 feature의 경우 데이터 컬럼을 제외하고 generation해야 하는 걸까요?   2. 1번의 질문과 비슷하게 feature의 값이 continuous 할 경우에만 적용을 하는건지? 아니면 범주형 feautre과 섞어서 사용해도 괜찮은가? 에 대해 궁금하여 질문 드립니다.   감사합니다.

혹시 feature 가 범주형 값이라고 할 때, 3개의 범주 이상 일 경우에는 모두  one hot encoding을 적용해야 하는 걸까요??

잘 따라가다가  centOS를 업데이트하려고 yum update -y를 입력하면 cannot find a valid baseurl for repo base/7/x86_64 에러가 납니다. 구글링 해봐도 소용이 없어서 글 남겨봅니다.

  안녕하세요 선생님 이전 NUCLEO-L152RE 보드를 추천받고 강의를 보면서 실습중입니다! 해당 보드를 연결하고, dvmgmt.msc에서 (1) 포트와 (2) 범용 직렬 버스 장치 항목을 통해 정상적으로 연결됨을 확인하였습니다. 이후 보드 디버깅을 하여 putty로 출력 결과를 보려하는데 아무것도 뜨지 않음을 확인하였습니다. 동일하게 COM3 / 115200 / Serial로 설정하였습니다. 무엇이 문제일까요??   (추가로) 새로운 PORT 프로젝트를 생성하고, FreeRTOS 코드를 추가할 때 영상과 달리, /* Initialize all configured peripherals */ MX_GPIO_Init();   까지만 생성되고, MX_USART2_UART_Init()이 생성되지 않습니다.   

ㄱ 안녕하세요 강사님, 제가 지금 이런 예외처리들을 serviceimpl단에서 해주고 있는데 예외처리를 서비스(비즈니스로직)단에서 처리하는 것은 잘못 된 것인가요?   그리고 이번 강의에 Customized~ExceptionHandler에서 @RestControllerAdvice라는 어노테이션을 달아줘서 모든 컨트롤러 전에 동작한다고 하셨는데, 저처럼 서비스단에서 예외처리를 해주면 어떤것을 달아줘야하나요?

이전 강의에서 이렇게 UserNotFoundException위에 @ResponseStatus(HttpStatus.NOT_FOUNT)어노테이션을 달아줬는데 이번 강의에 Custom~ExceptionHandler의 handleUserNotFoundException  이 메서드에서 또 HttpStatus.NOT_FOUND를 왜 해주는건가요? 기존의 UserNotFountException클래스의 어노테이션은 의미가 없는것이 아닌지 궁금하네요 ㅎㅎ