안녕하세요. Hello JPA - 애플리케이션 개발 강의 중 오류가 나서 질문 드립니다.

Question

실행 단계에서 아래와 같은 오류가 발생했습니다. 어떻게 처리해야 할까요..? ERROR: Connection is broken: "java.net.ConnectException: Connection refused: localhost" [90067-199] Exception in thread "main" 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) at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:237) at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:214) at org.hibernate.id.factory.internal.DefaultIdentifierGeneratorFactory.injectServices(DefaultIdentifierGeneratorFactory.java:152) at org.hibernate.service.internal.AbstractServiceRegistryImpl.injectDependencies(AbstractServiceRegistryImpl.java:286) at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:243) at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:214) at org.hibernate.boot.internal.InFlightMetadataCollectorImpl.(InFlightMetadataCollectorImpl.java:179) at org.hibernate.boot.model.process.spi.MetadataBuildingProcess.complete(MetadataBuildingProcess.java:119) at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.metadata(EntityManagerFactoryBuilderImpl.java:904) at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:935) at org.hibernate.jpa.HibernatePersistenceProvider.createEntityManagerFactory(HibernatePersistenceProvider.java:56) at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:79) at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:54) at hellojpa.JpaMain.main(JpaMain.java:9) Caused by: org.hibernate.exception.JDBCConnectionException: Error calling Driver#connect at org.hibernate.exception.internal.SQLExceptionTypeDelegate.convert(SQLExceptionTypeDelegate.java:48) 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.connections.internal.BasicConnectionCreator.convertSqlException(BasicConnectionCreator.java:118) at org.hibernate.engine.jdbc.connections.internal.DriverConnectionCreator.makeConnection(DriverConnectionCreator.java:41) at org.hibernate.engine.jdbc.connections.internal.BasicConnectionCreator.createConnection(BasicConnectionCreator.java:58) at org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl$PooledConnections.addConnections(DriverManagerConnectionProviderImpl.java:363) at org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl$PooledConnections.(DriverManagerConnectionProviderImpl.java:282) at org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl$PooledConnections.(DriverManagerConnectionProviderImpl.java:260) at org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl$PooledConnections$Builder.build(DriverManagerConnectionProviderImpl.java:401) at org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl.buildPool(DriverManagerConnectionProviderImpl.java:112) at org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl.configure(DriverManagerConnectionProviderImpl.java:75) at org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.configureService(StandardServiceRegistryImpl.java:100) at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:246) at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:214) at org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator.buildJdbcConnectionAccess(JdbcEnvironmentInitiator.java:145) at org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator.initiateService(JdbcEnvironmentInitiator.java:66) at org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator.initiateService(JdbcEnvironmentInitiator.java:35) at org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.initiateService(StandardServiceRegistryImpl.java:94) at org.hibernate.service.internal.AbstractServiceRegistryImpl.createService(AbstractServiceRegistryImpl.java:263) ... 14 more Caused by: org.h2.jdbc.JdbcSQLNonTransientConnectionException: Connection is broken: "java.net.ConnectException: Connection refused: localhost" [90067-199] at org.h2.message.DbException.getJdbcSQLException(DbException.java:617) at org.h2.message.DbException.getJdbcSQLException(DbException.java:427) at org.h2.message.DbException.get(DbException.java:194) at org.h2.engine.SessionRemote.connectServer(SessionRemote.java:435) at org.h2.engine.SessionRemote.connectEmbeddedOrServer(SessionRemote.java:317) at org.h2.jdbc.JdbcConnection.(JdbcConnection.java:169) at org.h2.jdbc.JdbcConnection.(JdbcConnection.java:148) at org.h2.Driver.connect(Driver.java:69) at org.hibernate.engine.jdbc.connections.internal.DriverConnectionCreator.makeConnection(DriverConnectionCreator.java:38) ... 29 more Caused by: java.net.ConnectException: Connection refused at java.base/sun.nio.ch.Net.pollConnect(Native Method) at java.base/sun.nio.ch.Net.pollConnectNow(Net.java:672) at java.base/sun.nio.ch.NioSocketImpl.timedFinishConnect(NioSocketImpl.java:554) at java.base/sun.nio.ch.NioSocketImpl.connect(NioSocketImpl.java:602) at java.base/java.net.SocksSocketImpl.connect(SocksSocketImpl.java:327) at java.base/java.net.Socket.connect(Socket.java:633) at org.h2.util.NetUtils.createSocket(NetUtils.java:103) at org.h2.util.NetUtils.createSocket(NetUtils.java:83) at org.h2.engine.SessionRemote.initTransfer(SessionRemote.java:115) at org.h2.engine.SessionRemote.connectServer(SessionRemote.java:431) ... 34 more

인프런 AI 인턴 · Answer

안녕하세요, 인프런 AI 인턴입니다. Nissi Jeong님의 질문에 대한 답변으로, 오류 메시지를 기반으로 판단할 때 &ldquo;Connection is broken: \&ldquo;java.net.ConnectException: Connection refused: localhost\&rdquo; [90067-199]&ldquo;와 같은 오류는 일반적으로 데이터베이스 연결에 문제가 있을 때 발생합니다. 이는 H2 데이터베이스 서버가 실행되지 않아서 발생할 수 있습니다. 비슷한 문제에 대한 해결책이 제시된 사례는 다음과 같습니다: - &ldquo;현재 오류 질문드립니다 , connect error?.&rdquo; 에서는 H2 데이터베이스 서버가 실행 중인지 확인하고, 해당 데이터베이스 서버를 켜야 한다는 해결 방안이 제시되었습니다. - &ldquo;main 오류 질문&rdquo; 에서는 SocketTimeoutException 발생 시, DB 연결 상태를 확인하라는 조언이 있습니다. - &ldquo;실행 오류 질문&rdquo; 에서도 H2 데이터베이스 실행 상태를 확인해야 한다는 답변이 제공되었습니다. 위와 같은 사례를 통해 Nissi Jeong님의 문제가 데이터베이스 실행과 연결 문제로 인해 발생한 것으로 추정됩니다. H2 데이터베이스 서버가 제대로 실행되고 있는지 확인해 주시기 바라며, 필요한 경우 데이터베이스 서버를 재시작해보는 것을 권장합니다. 저는 질문자님의 이해를 돕고자 지식공유자님의 기존 답변을 참고하여 유사한 답변 링크를 추천해드리고 있습니다. 현재 베타 기능으로 답변이 만족스럽지 않을 수 있는 점 양해 부탁드립니다. 🙏 추가적으로 궁금한 점이 있으시면, 이어서 질문해 주세요. 곧 지식공유자께서 답변해 주실 것입니다.