테스트 코드 실행으로만 따라오다가  실제 서버를 띄우고 마지막으로 살펴보려하니  아래와 같은 Err가 발생합니다 ...  [ main] h.hellospring.HelloSpringApplication : Started HelloSpringApplication in 11.777 seconds (JVM running for 13.962) [extShutdownHook] j.LocalContainerEntityManagerFactoryBean : Closing JPA EntityManagerFactory for persistence unit 'default' [extShutdownHook] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Shutdown initiated... [extShutdownHook] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Shutdown completed. EntityManager   관련하여 문제가 발생해서 바로 죽는거같은데.. 해결방법이 있을까요..? # dependency dependencies { implementation 'org.springframework.boot:spring-boot-starter-thymeleaf' implementation 'org.springframework.boot:spring-boot-starter-web' // implementation 'org.springframework.boot:spring-boot-starter-jdbc' implementation 'org.springframework.boot:spring-boot-starter-data-jpa' runtimeOnly 'com.h2database:h2' providedRuntime 'org.springframework.boot:spring-boot-starter-tomcat' testImplementation('org.springframework.boot:spring-boot-starter-test') { exclude group: 'org.junit.vintage', module: 'junit-vintage-engine' } } # apllication.properties spring.datasource.url=jdbc:h2:tcp://localhost/~/test spring.datasource.driver-class-name=org.h2.Driver spring.datasource.username=sa spring.jpa.show-sql=true spring.jpa.hibernate.ddl-auto=none