안녕하세요 강사님, 오류 관련 질문입니다. 테스트 실행, 실제 애플리케이션 실행 모두 에러가 나는 상황입니다. 처음에는 https://www.inflearn.com/questions/24457 이 질문과 같은 현상인 줄 알았는데 자세히 보니 같은 메세지도 있지만 새로운 에러메세지도 조금 보입니다. 현재 저는 자바11, 스프링 부트 2.4.1을 사용중이며 yml, gradle 파일은 전부 강의자료에 최종수정하여 올려주신대로 복붙하였습니다.(gradle에는 ext["h2.version"] = "1.4.199"만 따로 추가하였습니다. 최초 설치 시에는 1.4.200으로 받았었구요.)그래도 혹시 모르니 제 yml, gradle 코드를 함께 적어놓겠습니다. 아래에 실선으로 구분된 코드들은 yml, gradle, 에러메세지 요약, 에러메세지 전문 순서입니다. ㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡ (yml) spring: datasource: url: jdbc:h2:tcp://localhost/~/jpashop username: sa password: driver-class-name: org.h2.Driver jpa: hibernate: ddl-auto: create properties: hibernate: # show_sql: true format_sql: truelogging.level: org.hibernate.SQL: debug# org.hibernate.type: trace ㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡ (gradle) plugins { id 'org.springframework.boot' version '2.4.1' id 'io.spring.dependency-management' version '1.0.10.RELEASE' id 'java'}ext["h2.version"] = "1.4.199" // 최초 설치는 1.4.200으로 했음 group = 'jpabook'version = '0.0.1-SNAPSHOT'sourceCompatibility = '11'configurations { compileOnly { extendsFrom annotationProcessor }}repositories { mavenCentral()}dependencies { implementation 'org.springframework.boot:spring-boot-starter-data-jpa' implementation 'org.springframework.boot:spring-boot-starter-validation' implementation 'org.springframework.boot:spring-boot-starter-thymeleaf' implementation 'org.springframework.boot:spring-boot-starter-web' compileOnly 'org.projectlombok:lombok' runtimeOnly 'com.h2database:h2' annotationProcessor 'org.projectlombok:lombok' testImplementation 'org.springframework.boot:spring-boot-starter-test' //JUnit4 추가 testImplementation("org.junit.vintage:junit-vintage-engine") { exclude group: "org.hamcrest", module: "hamcrest-core" }}test { useJUnitPlatform()} ㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡ (에러메세지 요약) org.h2.jdbc.JdbcSQLNonTransientConnectionException: Connection is broken: "java.net.SocketTimeoutException: connect timed out: localhost" [90067-199]...Caused by: java.net.SocketTimeoutException: connect timed out... 2021-01-24 19:15:57.540  WARN 4064 --- [           main] o.h.e.j.e.i.JdbcEnvironmentInitiator     : HHH000342: Could not obtain connection to query metadata org.h2.jdbc.JdbcSQLNonTransientConnectionException: Connection is broken: "java.net.SocketTimeoutException: connect timed out: localhost" [90067-199]...Caused by: java.net.SocketTimeoutException: connect timed out... 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.service.spi.ServiceException: Unable to create requested service [org.hibernate.engine.jdbc.env.spi.JdbcEnvironment]... Caused by: org.hibernate.service.spi.ServiceException: Unable to create requested service [org.hibernate.engine.jdbc.env.spi.JdbcEnvironment]... Caused by: org.hibernate.HibernateException: Access to DialectResolutionInfo cannot be null when 'hibernate.dialect' not set ㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡ (에러메세지 전문) 2021-01-24 19:15:48.318  INFO 4064 --- [           main] jpabook.jpashop.JpashopApplication       : Starting JpashopApplication using Java 11.0.9 on LAPTOP-9KANBC06 with PID 4064 (C:\Users\hyung\Desktop\IntelliJ\jpashop\jpashop\out\production\classes started by hyung in C:\Users\hyung\Desktop\IntelliJ\jpashop\jpashop) 2021-01-24 19:15:48.325  INFO 4064 --- [           main] jpabook.jpashop.JpashopApplication       : No active profile set, falling back to default profiles: default 2021-01-24 19:15:49.848  INFO 4064 --- [           main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data JPA repositories in DEFAULT mode. 2021-01-24 19:15:49.875  INFO 4064 --- [           main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 14 ms. Found 0 JPA repository interfaces. 2021-01-24 19:15:53.381  INFO 4064 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 8080 (http) 2021-01-24 19:15:53.397  INFO 4064 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat] 2021-01-24 19:15:53.398  INFO 4064 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet engine: [Apache Tomcat/9.0.41] 2021-01-24 19:15:53.627  INFO 4064 --- [           main] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext 2021-01-24 19:15:53.627  INFO 4064 --- [           main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 5164 ms 2021-01-24 19:15:53.965  INFO 4064 --- [           main] o.hibernate.jpa.internal.util.LogHelper  : HHH000204: Processing PersistenceUnitInfo [name: default] 2021-01-24 19:15:54.060  INFO 4064 --- [           main] org.hibernate.Version                    : HHH000412: Hibernate ORM core version 5.4.25.Final 2021-01-24 19:15:54.253  INFO 4064 --- [           main] o.hibernate.annotations.common.Version   : HCANN000001: Hibernate Commons Annotations {5.1.2.Final} 2021-01-24 19:15:54.415  INFO 4064 --- [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Starting... 2021-01-24 19:15:57.535 ERROR 4064 --- [           main] com.zaxxer.hikari.pool.HikariPool        : HikariPool-1 - Exception during pool initialization. org.h2.jdbc.JdbcSQLNonTransientConnectionException: Connection is broken: "java.net.SocketTimeoutException: connect timed out: localhost" [90067-199] at org.h2.message.DbException.getJdbcSQLException(DbException.java:617) ~[h2-1.4.199.jar:1.4.199] at org.h2.message.DbException.getJdbcSQLException(DbException.java:427) ~[h2-1.4.199.jar:1.4.199] at org.h2.message.DbException.get(DbException.java:194) ~[h2-1.4.199.jar:1.4.199] at org.h2.engine.SessionRemote.connectServer(SessionRemote.java:435) ~[h2-1.4.199.jar:1.4.199] at org.h2.engine.SessionRemote.connectEmbeddedOrServer(SessionRemote.java:317) ~[h2-1.4.199.jar:1.4.199] at org.h2.jdbc.JdbcConnection.<init>(JdbcConnection.java:169) ~[h2-1.4.199.jar:1.4.199] at org.h2.jdbc.JdbcConnection.<init>(JdbcConnection.java:148) ~[h2-1.4.199.jar:1.4.199] at org.h2.Driver.connect(Driver.java:69) ~[h2-1.4.199.jar:1.4.199] at com.zaxxer.hikari.util.DriverDataSource.getConnection(DriverDataSource.java:138) ~[HikariCP-3.4.5.jar:na] at com.zaxxer.hikari.pool.PoolBase.newConnection(PoolBase.java:358) ~[HikariCP-3.4.5.jar:na] at com.zaxxer.hikari.pool.PoolBase.newPoolEntry(PoolBase.java:206) ~[HikariCP-3.4.5.jar:na] at com.zaxxer.hikari.pool.HikariPool.createPoolEntry(HikariPool.java:477) ~[HikariCP-3.4.5.jar:na] at com.zaxxer.hikari.pool.HikariPool.checkFailFast(HikariPool.java:560) ~[HikariCP-3.4.5.jar:na] at com.zaxxer.hikari.pool.HikariPool.<init>(HikariPool.java:115) ~[HikariCP-3.4.5.jar:na] at com.zaxxer.hikari.HikariDataSource.getConnection(HikariDataSource.java:112) ~[HikariCP-3.4.5.jar:na] at org.hibernate.engine.jdbc.connections.internal.DatasourceConnectionProviderImpl.getConnection(DatasourceConnectionProviderImpl.java:122) ~[hibernate-core-5.4.25.Final.jar:5.4.25.Final] at org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator$ConnectionProviderJdbcConnectionAccess.obtainConnection(JdbcEnvironmentInitiator.java:180) ~[hibernate-core-5.4.25.Final.jar:5.4.25.Final] at org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator.initiateService(JdbcEnvironmentInitiator.java:68) ~[hibernate-core-5.4.25.Final.jar:5.4.25.Final] at org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator.initiateService(JdbcEnvironmentInitiator.java:35) ~[hibernate-core-5.4.25.Final.jar:5.4.25.Final] at org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.initiateService(StandardServiceRegistryImpl.java:101) ~[hibernate-core-5.4.25.Final.jar:5.4.25.Final] at org.hibernate.service.internal.AbstractServiceRegistryImpl.createService(AbstractServiceRegistryImpl.java:263) ~[hibernate-core-5.4.25.Final.jar:5.4.25.Final] at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:237) ~[hibernate-core-5.4.25.Final.jar:5.4.25.Final] at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:214) ~[hibernate-core-5.4.25.Final.jar:5.4.25.Final] at org.hibernate.id.factory.internal.DefaultIdentifierGeneratorFactory.injectServices(DefaultIdentifierGeneratorFactory.java:152) ~[hibernate-core-5.4.25.Final.jar:5.4.25.Final] at org.hibernate.service.internal.AbstractServiceRegistryImpl.injectDependencies(AbstractServiceRegistryImpl.java:286) ~[hibernate-core-5.4.25.Final.jar:5.4.25.Final] at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:243) ~[hibernate-core-5.4.25.Final.jar:5.4.25.Final] at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:214) ~[hibernate-core-5.4.25.Final.jar:5.4.25.Final] at org.hibernate.boot.internal.InFlightMetadataCollectorImpl.<init>(InFlightMetadataCollectorImpl.java:176) ~[hibernate-core-5.4.25.Final.jar:5.4.25.Final] at org.hibernate.boot.model.process.spi.MetadataBuildingProcess.complete(MetadataBuildingProcess.java:127) ~[hibernate-core-5.4.25.Final.jar:5.4.25.Final] at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.metadata(EntityManagerFactoryBuilderImpl.java:1224) ~[hibernate-core-5.4.25.Final.jar:5.4.25.Final] at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:1255) ~[hibernate-core-5.4.25.Final.jar:5.4.25.Final] at org.springframework.orm.jpa.vendor.SpringHibernateJpaPersistenceProvider.createContainerEntityManagerFactory(SpringHibernateJpaPersistenceProvider.java:58) ~[spring-orm-5.3.2.jar:5.3.2] at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:365) ~[spring-orm-5.3.2.jar:5.3.2] at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory(AbstractEntityManagerFactoryBean.java:409) ~[spring-orm-5.3.2.jar:5.3.2] at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:396) ~[spring-orm-5.3.2.jar:5.3.2] at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.afterPropertiesSet(LocalContainerEntityManagerFactoryBean.java:341) ~[spring-orm-5.3.2.jar:5.3.2] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1847) ~[spring-beans-5.3.2.jar:5.3.2] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1784) ~[spring-beans-5.3.2.jar:5.3.2] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:609) ~[spring-beans-5.3.2.jar:5.3.2] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:531) ~[spring-beans-5.3.2.jar:5.3.2] at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) ~[spring-beans-5.3.2.jar:5.3.2] at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.2.jar:5.3.2] at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.2.jar:5.3.2] at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.2.jar:5.3.2] at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1159) ~[spring-context-5.3.2.jar:5.3.2] at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:913) ~[spring-context-5.3.2.jar:5.3.2] at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:588) ~[spring-context-5.3.2.jar:5.3.2] at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:144) ~[spring-boot-2.4.1.jar:2.4.1] at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:767) ~[spring-boot-2.4.1.jar:2.4.1] at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:759) ~[spring-boot-2.4.1.jar:2.4.1] at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:426) ~[spring-boot-2.4.1.jar:2.4.1] at org.springframework.boot.SpringApplication.run(SpringApplication.java:326) ~[spring-boot-2.4.1.jar:2.4.1] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1309) ~[spring-boot-2.4.1.jar:2.4.1] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1298) ~[spring-boot-2.4.1.jar:2.4.1] at jpabook.jpashop.JpashopApplication.main(JpashopApplication.java:15) ~[classes/:na] Caused by: java.net.SocketTimeoutException: connect timed out at java.base/java.net.PlainSocketImpl.waitForConnect(Native Method) ~[na:na] at java.base/java.net.PlainSocketImpl.socketConnect(PlainSocketImpl.java:107) ~[na:na] at java.base/java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:399) ~[na:na] at java.base/java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:242) ~[na:na] at java.base/java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:224) ~[na:na] at java.base/java.net.SocksSocketImpl.connect(SocksSocketImpl.java:403) ~[na:na] at java.base/java.net.Socket.connect(Socket.java:608) ~[na:na] at org.h2.util.NetUtils.createSocket(NetUtils.java:103) ~[h2-1.4.199.jar:1.4.199] at org.h2.util.NetUtils.createSocket(NetUtils.java:83) ~[h2-1.4.199.jar:1.4.199] at org.h2.engine.SessionRemote.initTransfer(SessionRemote.java:115) ~[h2-1.4.199.jar:1.4.199] at org.h2.engine.SessionRemote.connectServer(SessionRemote.java:431) ~[h2-1.4.199.jar:1.4.199] ... 51 common frames omitted 2021-01-24 19:15:57.540  WARN 4064 --- [           main] o.h.e.j.e.i.JdbcEnvironmentInitiator     : HHH000342: Could not obtain connection to query metadata org.h2.jdbc.JdbcSQLNonTransientConnectionException: Connection is broken: "java.net.SocketTimeoutException: connect timed out: localhost" [90067-199] at org.h2.message.DbException.getJdbcSQLException(DbException.java:617) ~[h2-1.4.199.jar:1.4.199] at org.h2.message.DbException.getJdbcSQLException(DbException.java:427) ~[h2-1.4.199.jar:1.4.199] at org.h2.message.DbException.get(DbException.java:194) ~[h2-1.4.199.jar:1.4.199] at org.h2.engine.SessionRemote.connectServer(SessionRemote.java:435) ~[h2-1.4.199.jar:1.4.199] at org.h2.engine.SessionRemote.connectEmbeddedOrServer(SessionRemote.java:317) ~[h2-1.4.199.jar:1.4.199] at org.h2.jdbc.JdbcConnection.<init>(JdbcConnection.java:169) ~[h2-1.4.199.jar:1.4.199] at org.h2.jdbc.JdbcConnection.<init>(JdbcConnection.java:148) ~[h2-1.4.199.jar:1.4.199] at org.h2.Driver.connect(Driver.java:69) ~[h2-1.4.199.jar:1.4.199] at com.zaxxer.hikari.util.DriverDataSource.getConnection(DriverDataSource.java:138) ~[HikariCP-3.4.5.jar:na] at com.zaxxer.hikari.pool.PoolBase.newConnection(PoolBase.java:358) ~[HikariCP-3.4.5.jar:na] at com.zaxxer.hikari.pool.PoolBase.newPoolEntry(PoolBase.java:206) ~[HikariCP-3.4.5.jar:na] at com.zaxxer.hikari.pool.HikariPool.createPoolEntry(HikariPool.java:477) ~[HikariCP-3.4.5.jar:na] at com.zaxxer.hikari.pool.HikariPool.checkFailFast(HikariPool.java:560) ~[HikariCP-3.4.5.jar:na] at com.zaxxer.hikari.pool.HikariPool.<init>(HikariPool.java:115) ~[HikariCP-3.4.5.jar:na] at com.zaxxer.hikari.HikariDataSource.getConnection(HikariDataSource.java:112) ~[HikariCP-3.4.5.jar:na] at org.hibernate.engine.jdbc.connections.internal.DatasourceConnectionProviderImpl.getConnection(DatasourceConnectionProviderImpl.java:122) ~[hibernate-core-5.4.25.Final.jar:5.4.25.Final] at org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator$ConnectionProviderJdbcConnectionAccess.obtainConnection(JdbcEnvironmentInitiator.java:180) ~[hibernate-core-5.4.25.Final.jar:5.4.25.Final] at org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator.initiateService(JdbcEnvironmentInitiator.java:68) ~[hibernate-core-5.4.25.Final.jar:5.4.25.Final] at org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator.initiateService(JdbcEnvironmentInitiator.java:35) ~[hibernate-core-5.4.25.Final.jar:5.4.25.Final] at org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.initiateService(StandardServiceRegistryImpl.java:101) ~[hibernate-core-5.4.25.Final.jar:5.4.25.Final] at org.hibernate.service.internal.AbstractServiceRegistryImpl.createService(AbstractServiceRegistryImpl.java:263) ~[hibernate-core-5.4.25.Final.jar:5.4.25.Final] at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:237) ~[hibernate-core-5.4.25.Final.jar:5.4.25.Final] at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:214) ~[hibernate-core-5.4.25.Final.jar:5.4.25.Final] at org.hibernate.id.factory.internal.DefaultIdentifierGeneratorFactory.injectServices(DefaultIdentifierGeneratorFactory.java:152) ~[hibernate-core-5.4.25.Final.jar:5.4.25.Final] at org.hibernate.service.internal.AbstractServiceRegistryImpl.injectDependencies(AbstractServiceRegistryImpl.java:286) ~[hibernate-core-5.4.25.Final.jar:5.4.25.Final] at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:243) ~[hibernate-core-5.4.25.Final.jar:5.4.25.Final] at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:214) ~[hibernate-core-5.4.25.Final.jar:5.4.25.Final] at org.hibernate.boot.internal.InFlightMetadataCollectorImpl.<init>(InFlightMetadataCollectorImpl.java:176) ~[hibernate-core-5.4.25.Final.jar:5.4.25.Final] at org.hibernate.boot.model.process.spi.MetadataBuildingProcess.complete(MetadataBuildingProcess.java:127) ~[hibernate-core-5.4.25.Final.jar:5.4.25.Final] at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.metadata(EntityManagerFactoryBuilderImpl.java:1224) ~[hibernate-core-5.4.25.Final.jar:5.4.25.Final] at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:1255) ~[hibernate-core-5.4.25.Final.jar:5.4.25.Final] at org.springframework.orm.jpa.vendor.SpringHibernateJpaPersistenceProvider.createContainerEntityManagerFactory(SpringHibernateJpaPersistenceProvider.java:58) ~[spring-orm-5.3.2.jar:5.3.2] at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:365) ~[spring-orm-5.3.2.jar:5.3.2] at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory(AbstractEntityManagerFactoryBean.java:409) ~[spring-orm-5.3.2.jar:5.3.2] at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:396) ~[spring-orm-5.3.2.jar:5.3.2] at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.afterPropertiesSet(LocalContainerEntityManagerFactoryBean.java:341) ~[spring-orm-5.3.2.jar:5.3.2] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1847) ~[spring-beans-5.3.2.jar:5.3.2] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1784) ~[spring-beans-5.3.2.jar:5.3.2] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:609) ~[spring-beans-5.3.2.jar:5.3.2] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:531) ~[spring-beans-5.3.2.jar:5.3.2] at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) ~[spring-beans-5.3.2.jar:5.3.2] at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.2.jar:5.3.2] at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.2.jar:5.3.2] at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.2.jar:5.3.2] at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1159) ~[spring-context-5.3.2.jar:5.3.2] at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:913) ~[spring-context-5.3.2.jar:5.3.2] at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:588) ~[spring-context-5.3.2.jar:5.3.2] at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:144) ~[spring-boot-2.4.1.jar:2.4.1] at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:767) ~[spring-boot-2.4.1.jar:2.4.1] at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:759) ~[spring-boot-2.4.1.jar:2.4.1] at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:426) ~[spring-boot-2.4.1.jar:2.4.1] at org.springframework.boot.SpringApplication.run(SpringApplication.java:326) ~[spring-boot-2.4.1.jar:2.4.1] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1309) ~[spring-boot-2.4.1.jar:2.4.1] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1298) ~[spring-boot-2.4.1.jar:2.4.1] at jpabook.jpashop.JpashopApplication.main(JpashopApplication.java:15) ~[classes/:na] Caused by: java.net.SocketTimeoutException: connect timed out at java.base/java.net.PlainSocketImpl.waitForConnect(Native Method) ~[na:na] at java.base/java.net.PlainSocketImpl.socketConnect(PlainSocketImpl.java:107) ~[na:na] at java.base/java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:399) ~[na:na] at java.base/java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:242) ~[na:na] at java.base/java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:224) ~[na:na] at java.base/java.net.SocksSocketImpl.connect(SocksSocketImpl.java:403) ~[na:na] at java.base/java.net.Socket.connect(Socket.java:608) ~[na:na] at org.h2.util.NetUtils.createSocket(NetUtils.java:103) ~[h2-1.4.199.jar:1.4.199] at org.h2.util.NetUtils.createSocket(NetUtils.java:83) ~[h2-1.4.199.jar:1.4.199] at org.h2.engine.SessionRemote.initTransfer(SessionRemote.java:115) ~[h2-1.4.199.jar:1.4.199] at org.h2.engine.SessionRemote.connectServer(SessionRemote.java:431) ~[h2-1.4.199.jar:1.4.199] ... 51 common frames omitted 2021-01-24 19:15:57.551 ERROR 4064 --- [           main] j.LocalContainerEntityManagerFactoryBean : Failed to initialize JPA EntityManagerFactory: Unable to create requested service [org.hibernate.engine.jdbc.env.spi.JdbcEnvironment] 2021-01-24 19:15:57.553  WARN 4064 --- [           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.service.spi.ServiceException: Unable to create requested service [org.hibernate.engine.jdbc.env.spi.JdbcEnvironment] 2021-01-24 19:15:57.568  INFO 4064 --- [           main] o.apache.catalina.core.StandardService   : Stopping service [Tomcat] 2021-01-24 19:15:57.641  INFO 4064 --- [           main] ConditionEvaluationReportLoggingListener :  Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled. 2021-01-24 19:15:57.722 ERROR 4064 --- [           main] 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]: Invocation of init method failed; nested exception is org.hibernate.service.spi.ServiceException: Unable to create requested service [org.hibernate.engine.jdbc.env.spi.JdbcEnvironment] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1788) ~[spring-beans-5.3.2.jar:5.3.2] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:609) ~[spring-beans-5.3.2.jar:5.3.2] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:531) ~[spring-beans-5.3.2.jar:5.3.2] at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) ~[spring-beans-5.3.2.jar:5.3.2] at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.2.jar:5.3.2] at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.2.jar:5.3.2] at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.2.jar:5.3.2] at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1159) ~[spring-context-5.3.2.jar:5.3.2] at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:913) ~[spring-context-5.3.2.jar:5.3.2] at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:588) ~[spring-context-5.3.2.jar:5.3.2] at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:144) ~[spring-boot-2.4.1.jar:2.4.1] at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:767) ~[spring-boot-2.4.1.jar:2.4.1] at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:759) ~[spring-boot-2.4.1.jar:2.4.1] at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:426) ~[spring-boot-2.4.1.jar:2.4.1] at org.springframework.boot.SpringApplication.run(SpringApplication.java:326) ~[spring-boot-2.4.1.jar:2.4.1] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1309) ~[spring-boot-2.4.1.jar:2.4.1] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1298) ~[spring-boot-2.4.1.jar:2.4.1] at jpabook.jpashop.JpashopApplication.main(JpashopApplication.java:15) ~[classes/:na] Caused by: org.hibernate.service.spi.ServiceException: Unable to create requested service [org.hibernate.engine.jdbc.env.spi.JdbcEnvironment] at org.hibernate.service.internal.AbstractServiceRegistryImpl.createService(AbstractServiceRegistryImpl.java:275) ~[hibernate-core-5.4.25.Final.jar:5.4.25.Final] at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:237) ~[hibernate-core-5.4.25.Final.jar:5.4.25.Final] at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:214) ~[hibernate-core-5.4.25.Final.jar:5.4.25.Final] at org.hibernate.id.factory.internal.DefaultIdentifierGeneratorFactory.injectServices(DefaultIdentifierGeneratorFactory.java:152) ~[hibernate-core-5.4.25.Final.jar:5.4.25.Final] at org.hibernate.service.internal.AbstractServiceRegistryImpl.injectDependencies(AbstractServiceRegistryImpl.java:286) ~[hibernate-core-5.4.25.Final.jar:5.4.25.Final] at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:243) ~[hibernate-core-5.4.25.Final.jar:5.4.25.Final] at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:214) ~[hibernate-core-5.4.25.Final.jar:5.4.25.Final] at org.hibernate.boot.internal.InFlightMetadataCollectorImpl.<init>(InFlightMetadataCollectorImpl.java:176) ~[hibernate-core-5.4.25.Final.jar:5.4.25.Final] at org.hibernate.boot.model.process.spi.MetadataBuildingProcess.complete(MetadataBuildingProcess.java:127) ~[hibernate-core-5.4.25.Final.jar:5.4.25.Final] at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.metadata(EntityManagerFactoryBuilderImpl.java:1224) ~[hibernate-core-5.4.25.Final.jar:5.4.25.Final] at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:1255) ~[hibernate-core-5.4.25.Final.jar:5.4.25.Final] at org.springframework.orm.jpa.vendor.SpringHibernateJpaPersistenceProvider.createContainerEntityManagerFactory(SpringHibernateJpaPersistenceProvider.java:58) ~[spring-orm-5.3.2.jar:5.3.2] at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:365) ~[spring-orm-5.3.2.jar:5.3.2] at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory(AbstractEntityManagerFactoryBean.java:409) ~[spring-orm-5.3.2.jar:5.3.2] at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:396) ~[spring-orm-5.3.2.jar:5.3.2] at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.afterPropertiesSet(LocalContainerEntityManagerFactoryBean.java:341) ~[spring-orm-5.3.2.jar:5.3.2] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1847) ~[spring-beans-5.3.2.jar:5.3.2] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1784) ~[spring-beans-5.3.2.jar:5.3.2] ... 17 common frames omitted Caused by: org.hibernate.HibernateException: Access to DialectResolutionInfo cannot be null when 'hibernate.dialect' not set at org.hibernate.engine.jdbc.dialect.internal.DialectFactoryImpl.determineDialect(DialectFactoryImpl.java:100) ~[hibernate-core-5.4.25.Final.jar:5.4.25.Final] at org.hibernate.engine.jdbc.dialect.internal.DialectFactoryImpl.buildDialect(DialectFactoryImpl.java:54) ~[hibernate-core-5.4.25.Final.jar:5.4.25.Final] at org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator.initiateService(JdbcEnvironmentInitiator.java:137) ~[hibernate-core-5.4.25.Final.jar:5.4.25.Final] at org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator.initiateService(JdbcEnvironmentInitiator.java:35) ~[hibernate-core-5.4.25.Final.jar:5.4.25.Final] at org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.initiateService(StandardServiceRegistryImpl.java:101) ~[hibernate-core-5.4.25.Final.jar:5.4.25.Final] at org.hibernate.service.internal.AbstractServiceRegistryImpl.createService(AbstractServiceRegistryImpl.java:263) ~[hibernate-core-5.4.25.Final.jar:5.4.25.Final] ... 34 common frames omitted Process finished with exit code 1 ㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡ 스크롤 압박이 큰 질문을 드려 너무나 죄송합니다. 다른 질문들에 달아주신 답변과 구글링으로 최대한 혼자 해결해보고자 몇 시간 동안 고군분투 했으나 실패하여 이렇게 질문을 남깁니다. 부디 조언을 부탁드립니다.

제로초님 블로그 redis 를 읽고 궁금한 점이 생겨 질문 드립니다. 예약 정보 조회 예약 상태가 예약전이면 예약성공으로 업데아트 예약 상태가 예약 성공 이면 무시 redis 는 싱글 스레드로 알고 있습니다. 그러면 예를 들어 redis 를 사용해서 두 사용자가 동시에 예약을해서(예약전 => 예약 성공) 예약상태를 변경하는 경우에 redis 를 사용하면 별도의 처리 없이도 동시성이 보장되어 동시에 두 사용자가 예약이 성공되버리는 문제는 발생하지 않는 건가요? 

create database test_db char set = 'utf8' collate = 'utf8_general_ci'; 이렇게 작성을 하고 테이블 생성 할려고하는데  19:13:34 create database test_db char set = 'utf8' collate = 'utf8_general_ci' 1 row(s) affected, 2 warning(s): 3719 'utf8' is currently an alias for the character set UTF8MB3, but will be an alias for UTF8MB4 in a future release. Please consider using UTF8MB4 in order to be unambiguous. 3778 'utf8_general_ci' is a collation of the deprecated character set UTF8MB3. Please consider using UTF8MB4 with an appropriate collation instead. 0.015 sec 계속 이런 err가 나오더라구요 어떻게 해결하면 될까요?

마지막 예제코드에 superClass 메서드가  super함수의 역할을 하는 것 같아요. 여태까지 배운 내용으로 추측해보면 superClass메서드를 사용한다면 별도로 브릿지 함수를 사용할 필요가 없을 것 같습니다. 이는 superClass메서드를 호출하는 제어권을 자식클래스가 갖게끔해준거라고 생각하면 되는 것일까요? class문법의 경우에 상속하는 경우 constructor 생성자함수에서 super 함수를 사용하지 않으면 에러가 출력되더라구요. 이는 es6에서는  브릿지함수를 사용할 필요가 없는 것이라고 생각하면 되는걸까요? --- 강의 덕분에 js를 아는데 많은 도움이 됐습니다. 이 글을 빌어서 정말 감사하다는 말씀드리고 싶습니다!

1. ,변수,를 사용하면 좌,우로 띄어쓰기가 발생하는데 이 띄어쓰기를 없애는 방법이 있나요? 2. str(is_adult)에서 True가 출력된 이유가 궁금합니다.

안녕하세요. 강의 즐겁게 잘 들었습니다. 강의 완강 후 밤에 antd 좀 만지고 formik 적용해보고 toolkit바꾸고 해보느냐 몸은 피곤하지만 즐거웠네요. toolkit 적용 해보느냐 이것저것 해보다가 제로초님 github에 올리신 소스도 참고 했는데요. next-redux-wrapper를 안쓰신거 같더라고요.   https://github.com/sorayeon/react-nodebird-toolkit SSR 부분 기존 saga로직은 빼고 dispatch할 때 await을 붙여주니 페이지가 잘 열리는데요.  이것저것 해보다 얻어걸린거라서; 간단하게 이런식으로 해도 되는지, 문제 있는 방법인지 궁금합니다.  saga관련 로직 삭제 : (context.store.dispatch(END);  await context.store.sagaTask.toPromise();) await context.store.dispatch(loadPosts()); await context.store.dispatch(loadMyInfo());

npx sequelize db:create 입력시 아래와 같은 에러가 뜹니다 ㅠ  Sequelize CLI [Node: 14.15.0, CLI: 6.2.0, ORM: 6.4.0] Loaded configuration file "config/config.json". Using environment "development". ERROR: Failed to create schema directory 'react-nodebird' (errno: 2 - No such file or directory)

삭제된 글입니다

지금 Order와 Product가 ManytoOne 관계인데 한번 주문할때 여러 상품을 주문할 수도 있으니까 Many to Many로 해도 상관없나요?

안녕하세요. print 함수 설명이 안나와 가지구요 ㅠㅠ 아래 설명과 같이 하려고 하는데 autocomplete-python폴더 내에 grammer로 시작하는 파일 자체가 없습니다. ㅠㅠ 어떻게 해결해야 할까요.

강의를 아직 끝까지 듣지는 않았는데 제목 목록만 봐서는 강의에서 안 다루어지는 것 같아서 이미지 생성 순서 강의에 질문 남깁니다.  제가 지금 데이터+코드 로 딥러닝 개발환경을 도커 위에 구축하는 것을 해보려고 하는데요. 도커로 묶어서 컨테이너로 만드는 것 까지는 성공을 했어요.  주피터 노트북 웹으로 연결해서 쓰고 싶어서 포트 연결까지 해주었는데요. 아래 명렁어로 컨테이너를 실행시켜주었습니다.  docker run -it -p 8888:8888 -d -v $(pwd)/notebooks:/notebooks final_doc -v $(pwd)/notebooks:/notebooks  부분은 dockerfile 에서 COPY 를 넣어도 왜인지(제가 경로를 잘 못기입한건지) 파일 복사가 안되어서 부득이하게 저렇게 시작할때 명령어로 주게 되었네요. notebooks 안에는 모델과 데이터가 담겨 있습니다.  그리고 나서   docker export 이미지아이디 >doc_cow_classification.tar  로 컨테이너를 tar 파일로 만들고 $ docker import doc_cow_classification.tar imported_img 를 이용해서 다시 이미지로 변환해 준 뒤 docker images로 이미지가 생성된 것을 확인하고   docker run -it -p 8888:8888 -d imported_img 를 했더니  docker: Error response from daemon: No command specified. 와 같은 에러를 만났습니다.  찾아보니 뭐,, 엔트리 포인트 커맨드를 직접 알려줘야 한다고 하더군요 (잘 이해는 안되었지만 기존에 tar 를 생성했던 컨테이너가 docker ps 로 정보 출력했을떄 CMD  가  /run_jupyter.sh  였어서 그것을 넣어 주었습니다.   docker run -it -p 8888:8888 -d imported_img:latest /run_jupyter.sh 명렁어를 실행시키니 오류는 나지 않지만 docker ps 를 해도 컨테이너가 만들어진 것이 없습니다.. 1. 실행을 시켜도 아무 오류가 나지 않으면서 컨테이너가 만들어지지 않는 것은 무엇이 잘못 되었을까요? 정확한 답이 아니더라도 이러이러한것을 찾아보셔도좋을것 같아요 정도의 커멘트라도 정말 감사합니다 ㅠㅠ  2. export 명렁어를 찾아보니 컨테이너와 이미지 모두를 tar화 할 수 있다고 하는데, 제가 컨테이너 실행 시킬 때 같이 명령어에 입력해 주었던 docker run -it -p 8888:8888 -d -v $(pwd)/notebooks:/notebooks final_doc 포트 연결 정보도 남아 있게 되나요? 아니면 컨테이너-tar- 이미지 로 바꾸서 다시 실행시키면 저 정보를 다시 입력해 주어야 하나요? 긴 질문 읽어주셔서 감사합니다. ps. 좋은 강의 정말 감사드려요. 혼자 공부하고 있는데 구글링만 하면서  파편화 되어 있던 지식들을 이 강의를 통해 구조화 시킬 수 있었습니다. 강의 자료도 정말 좋고,, 일부러 에러 상황 먼저 만들어 주시고 해결 방법 알려주는 식의 진행도 정말 좋아요.. 떠먹여 주시는 강의 감사합니다. 

강의자료의 github는 풀이 java파일만 있는거같아서요.

리액트 요새 클래스에서 훅을 쓰는 추세인데.. 저희 회사에서는 뷰 nuxt.ts기반으로 개발하면서 클래스 기반을 쓰는 데 그게 최신 추세인가요? 

C에서는 그냥 Choice.sicissors라고 써도 괜찮았던 것 같은데 C#은 일일히 캐스팅해줘야 하는 건가요? 이런 Rule이 장단점이 있는 것 같네요. 설정에서 뭔가 바꿔줄 수 있을 것 같은데...

안녕하세요. 수고많으십니다. main.js 소스중 일부 log, logout_process 소스가 빠져있어 부탁드립니다. 감사합니다.

에러 메시지가 아래와 같이 출력됩니다. 뒷부분 로그인/로그아웃까지 진행했는데, 회원가입 후 로그인, 로그아웃은 제대로 돌아갑니다. 아마 회원가입 후 db에서 넣고 그 다음부터 에러가 나는 듯 합니다. django.urls.exceptions.NoReverseMatch: 'acocuntapp' is not a registered namespace

선생님 df_last['"전용면적"].value_counts() 하면  전용면적별로 해당 빈도수가 나오는데.. 혹시 결측치 제외하고 보려면 어떻게 해야 하나요?  df_last['"전용면적"].notnull().value_counts() 도 해봤고.. df_last['"전용면적"].value_counts().notnull() 도 해봤고.. df_last['"전용면적"].notnull.value_counts() 도 해봤는데.. 제가 원하는 값이 안나오네요..ㅠ 

영상의 3:24초 경에서 Player(유니티짱)에서 Camera로 향하는 Raycasting을 할 때 왜 카메라 위치에 transform.position이 아니라 _delta를 하나요?  _delta는 플레이어에서 카메라까지의 거리를 담은 vector3라고 알고 있어서요. 그래서 제가 생각했을 땐 _delta가 아닌 transform.position을 넣어야 잘 작동할 것 같은데 막상 transform.position을 넣었더니 카메라 위치가 아닌 곳으로 ray를 쏘고 있더라고요.  Camera의 position을 넣어야 할 것 같은 Physics.Raycast()의 두번째 인자에 _delta 를 값을 넣어야 잘 작동하는 이유가 무엇인가요?

선생님 안녕하세요 강의 17분에서 캡처한 그림인데요.. 맨윗줄에서 2번째 그림 2번째 줄에서 1번째 그림  그 2개의 그림에서는 왜 서울 지역만 점이 찍힌걸로 보이나요..?  다른 scatterplot 의 그림들과 달리 확연히 서울 지역의 분홍색점만 찍혀 있는 것 같아서요..

안녕하세요.  강의대로 따라한다고 하지만 결과가 항상 달라 애를 먹고 있습니다. 현상 : 수신 결과가 깨져서 나옵니다 UART5에서 수신된 데이터를  UART6으로  보는 것에서 각 통신속도가  115200으로 같은데 왜 안나올까요. 아래 코드에서 확인 가능할까요? ? ?. void MX_UART5_Init(void) {   LL_USART_InitTypeDef USART_InitStruct = {0};   LL_GPIO_InitTypeDef GPIO_InitStruct = {0};   /* Peripheral clock enable */   LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_UART5);   LL_AHB1_GRP1_EnableClock(LL_AHB1_GRP1_PERIPH_GPIOC);   LL_AHB1_GRP1_EnableClock(LL_AHB1_GRP1_PERIPH_GPIOD);   /**UART5 GPIO Configuration   PC12   ------> UART5_TX   PD2   ------> UART5_RX   */   GPIO_InitStruct.Pin = LL_GPIO_PIN_12;   GPIO_InitStruct.Mode = LL_GPIO_MODE_ALTERNATE;   GPIO_InitStruct.Speed = LL_GPIO_SPEED_FREQ_VERY_HIGH;   GPIO_InitStruct.OutputType = LL_GPIO_OUTPUT_PUSHPULL;   GPIO_InitStruct.Pull = LL_GPIO_PULL_UP;   GPIO_InitStruct.Alternate = LL_GPIO_AF_8;   LL_GPIO_Init(GPIOC, &GPIO_InitStruct);   GPIO_InitStruct.Pin = LL_GPIO_PIN_2;   GPIO_InitStruct.Mode = LL_GPIO_MODE_ALTERNATE;   GPIO_InitStruct.Speed = LL_GPIO_SPEED_FREQ_VERY_HIGH;   GPIO_InitStruct.OutputType = LL_GPIO_OUTPUT_PUSHPULL;   GPIO_InitStruct.Pull = LL_GPIO_PULL_UP;   GPIO_InitStruct.Alternate = LL_GPIO_AF_8;   LL_GPIO_Init(GPIOD, &GPIO_InitStruct);   /* UART5 interrupt Init */   NVIC_SetPriority(UART5_IRQn, NVIC_EncodePriority(NVIC_GetPriorityGrouping(),0, 0));   NVIC_EnableIRQ(UART5_IRQn);   USART_InitStruct.BaudRate = 115200;   USART_InitStruct.DataWidth = LL_USART_DATAWIDTH_8B;   USART_InitStruct.StopBits = LL_USART_STOPBITS_1;   USART_InitStruct.Parity = LL_USART_PARITY_NONE;   USART_InitStruct.TransferDirection = LL_USART_DIRECTION_RX;   USART_InitStruct.HardwareFlowControl = LL_USART_HWCONTROL_NONE;   USART_InitStruct.OverSampling = LL_USART_OVERSAMPLING_16;   LL_USART_Init(UART5, &USART_InitStruct);   LL_USART_ConfigAsyncMode(UART5);   LL_USART_Enable(UART5); } /* USART6 init function */ void MX_USART6_UART_Init(void) {   LL_USART_InitTypeDef USART_InitStruct = {0};   LL_GPIO_InitTypeDef GPIO_InitStruct = {0};   /* Peripheral clock enable */   LL_APB2_GRP1_EnableClock(LL_APB2_GRP1_PERIPH_USART6);   LL_AHB1_GRP1_EnableClock(LL_AHB1_GRP1_PERIPH_GPIOC);   /**USART6 GPIO Configuration   PC6   ------> USART6_TX   PC7   ------> USART6_RX   */   GPIO_InitStruct.Pin = LL_GPIO_PIN_6|LL_GPIO_PIN_7;   GPIO_InitStruct.Mode = LL_GPIO_MODE_ALTERNATE;   GPIO_InitStruct.Speed = LL_GPIO_SPEED_FREQ_VERY_HIGH;   GPIO_InitStruct.OutputType = LL_GPIO_OUTPUT_PUSHPULL;   GPIO_InitStruct.Pull = LL_GPIO_PULL_NO;   GPIO_InitStruct.Alternate = LL_GPIO_AF_8;   LL_GPIO_Init(GPIOC, &GPIO_InitStruct);   /* USART6 interrupt Init */   NVIC_SetPriority(USART6_IRQn, NVIC_EncodePriority(NVIC_GetPriorityGrouping(),0, 0));   NVIC_EnableIRQ(USART6_IRQn);   USART_InitStruct.BaudRate = 115200;   USART_InitStruct.DataWidth = LL_USART_DATAWIDTH_8B;   USART_InitStruct.StopBits = LL_USART_STOPBITS_1;   USART_InitStruct.Parity = LL_USART_PARITY_NONE;   USART_InitStruct.TransferDirection = LL_USART_DIRECTION_TX_RX;   USART_InitStruct.HardwareFlowControl = LL_USART_HWCONTROL_NONE;   USART_InitStruct.OverSampling = LL_USART_OVERSAMPLING_16;   LL_USART_Init(USART6, &USART_InitStruct);   LL_USART_ConfigAsyncMode(USART6);   LL_USART_Enable(USART6); }