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问题:

I use jpa with hibernate. I have following method:

@Transactional public void myMethod(){ ... firstJDBCTemplateQuery(); secondJDBCTemplateQuery(); ...  }

firstJDBCTemplateQuery works, but it closes connection to database. When second secondJDBCTempolateQuery is executed

java.sql.SQLException: Connection is closed exception

is thrown what causes

org.springframework.transaction.TransactionSystemException: Could not roll back JPA transaction ...

My configuration: EDIT

     <bean id="dataSource"             class="org.apache.commons.dbcp.BasicDataSource">             <property name="driverClassName" value="${jdbc.driverClassName}" />             <property name="url" value="${jdbc.url}" />             <property name="username" value="${jdbc.username}" />             <property name="password" value="${jdbc.password}" />          </bean>           <bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">             <property name="entityManagerFactory" ref="emf" />          </bean>          <tx:annotation-driven transaction-manager="transactionManager" /> <bean id="emf"         class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">         <property name="dataSource" ref="dataSource" />         <property name="jpaVendorAdapter">             <bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter" />         </property>         <property name="packagesToScan" value="com.emisoft.ami.user.domain" />          <property name="jpaProperties">             <props>                 <prop key="hibernate.dialect">org.hibernate.dialect.PostgreSQLDialect</prop>                 <prop key="hibernate.max_fetch_depth">3</prop>                 <prop key="hibernate.jdbc.fetch_size">50</prop>                 <prop key="hibernate.jdbc.batch_size">10</prop>                 <prop key="hibernate.show_sql">false</prop>             </props>         </property>      </bean>       <jpa:repositories base-package="com.emisoft.ami.user.repository"         entity-manager-factory-ref="emf" transaction-manager-ref="transactionManager" />         ...

I don't know why 'firstJDBCTemplateQuery' close db connection. How to resolve this problem?

StackTrace:

    org.springframework.jdbc.support.MetaDataAccessException: Error while extracting DatabaseMetaData; nested exception is java.sql.SQLException: Connection is closed.         at org.springframework.jdbc.support.JdbcUtils.extractDatabaseMetaData(JdbcUtils.java:296)         at org.springframework.jdbc.support.JdbcUtils.extractDatabaseMetaData(JdbcUtils.java:320)         at org.springframework.jdbc.support.SQLErrorCodesFactory.getErrorCodes(SQLErrorCodesFactory.java:214)         at org.springframework.jdbc.support.SQLErrorCodeSQLExceptionTranslator.setDataSource(SQLErrorCodeSQLExceptionTranslator.java:140)         at org.springframework.jdbc.support.SQLErrorCodeSQLExceptionTranslator.<init>(SQLErrorCodeSQLExceptionTranslator.java:103)         at org.springframework.jdbc.support.JdbcAccessor.getExceptionTranslator(JdbcAccessor.java:99)         at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:605)         at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:639)         at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:668)         at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:676)         at org.springframework.jdbc.core.JdbcTemplate.queryForObject(JdbcTemplate.java:731)         at org.springframework.jdbc.core.JdbcTemplate.queryForObject(JdbcTemplate.java:747)         at org.springframework.jdbc.core.JdbcTemplate.queryForInt(JdbcTemplate.java:782)         at org.springframework.security.provisioning.JdbcUserDetailsManager.findGroupId(JdbcUserDetailsManager.java:373)         at org.springframework.security.provisioning.JdbcUserDetailsManager.addUserToGroup(JdbcUserDetailsManager.java:301) //////////////////////////////////////////////////This is secondJDBCTemplateQuery///////////         at com.emisoft.ami.user.service.impl.UserServiceImpl.insert(UserServiceImpl.java:42) ///////////////////////////////////////////////////////////////////////////////////////////         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)         at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)         at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)         at java.lang.reflect.Method.invoke(Method.java:606)         at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:317)         at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183)         at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)         at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:96)         at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:260)         at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:94)         at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)         at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)         at com.sun.proxy.$Proxy46.insert(Unknown Source)         at com.kulig.test.service.PaymentServiceContext.main(PaymentServiceContext.java:28)     Caused by: java.sql.SQLException: Connection is closed.         at org.apache.commons.dbcp.PoolingDataSource$PoolGuardConnectionWrapper.checkOpen(PoolingDataSource.java:185)         at org.apache.commons.dbcp.PoolingDataSource$PoolGuardConnectionWrapper.getMetaData(PoolingDataSource.java:244)         at org.springframework.jdbc.support.JdbcUtils.extractDatabaseMetaData(JdbcUtils.java:285)         ... 29 more     DEBUG: org.springframework.jdbc.support.SQLErrorCodeSQLExceptionTranslator - Unable to translate SQLException with Error code '0', will now try the fallback translator     DEBUG: org.springframework.orm.jpa.JpaTransactionManager - Initiating transaction rollback     DEBUG: org.springframework.orm.jpa.JpaTransactionManager - Rolling back JPA transaction on EntityManager [org.hibernate.ejb.EntityManagerImpl@76c741]     DEBUG: org.hibernate.engine.transaction.spi.AbstractTransactionImpl - rolling back     DEBUG: org.hibernate.engine.transaction.internal.jdbc.JdbcTransaction - re-enabling autocommit     DEBUG: org.hibernate.engine.transaction.internal.jdbc.JdbcTransaction - Could not toggle autocommit     java.sql.SQLException: Connection is closed.         at org.apache.commons.dbcp.PoolingDataSource$PoolGuardConnectionWrapper.checkOpen(PoolingDataSource.java:185)         at org.apache.commons.dbcp.PoolingDataSource$PoolGuardConnectionWrapper.setAutoCommit(PoolingDataSource.java:327)         at org.hibernate.engine.transaction.internal.jdbc.JdbcTransaction.releaseManagedConnection(JdbcTransaction.java:127)         at org.hibernate.engine.transaction.internal.jdbc.JdbcTransaction.doRollback(JdbcTransaction.java:170)         at org.hibernate.engine.transaction.spi.AbstractTransactionImpl.rollback(AbstractTransactionImpl.java:209)         at org.hibernate.ejb.TransactionImpl.rollback(TransactionImpl.java:106)         at org.springframework.orm.jpa.JpaTransactionManager.doRollback(JpaTransactionManager.java:539)         at org.springframework.transaction.support.AbstractPlatformTransactionManager.processRollback(AbstractPlatformTransactionManager.java:846)         at org.springframework.transaction.support.AbstractPlatformTransactionManager.rollback(AbstractPlatformTransactionManager.java:823)         at org.springframework.transaction.interceptor.TransactionAspectSupport.completeTransactionAfterThrowing(TransactionAspectSupport.java:493)         at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:264)         at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:94)         at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)         at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)         at com.sun.proxy.$Proxy46.insert(Unknown Source)         at com.kulig.test.service.PaymentServiceContext.main(PaymentServiceContext.java:28)     DEBUG: org.springframework.orm.jpa.JpaTransactionManager - Closing JPA EntityManager [org.hibernate.ejb.EntityManagerImpl@76c741] after transaction     DEBUG: org.hibernate.engine.jdbc.internal.LogicalConnectionImpl - Releasing JDBC connection     DEBUG: org.hibernate.engine.jdbc.internal.LogicalConnectionImpl - Released JDBC connection     ERROR: org.springframework.transaction.interceptor.TransactionInterceptor - Application exception overridden by rollback exception     org.springframework.jdbc.UncategorizedSQLException: PreparedStatementCallback; uncategorized SQLException for SQL [select id from groups where group_name = ?]; SQL state [null]; error code [0]; Connection is closed.; nested exception is java.sql.SQLException: Connection is closed.         at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:83)         at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:80)         at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:80)         at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:605)         at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:639)         at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:668)         at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:676)         at org.springframework.jdbc.core.JdbcTemplate.queryForObject(JdbcTemplate.java:731)         at org.springframework.jdbc.core.JdbcTemplate.queryForObject(JdbcTemplate.java:747)         at org.springframework.jdbc.core.JdbcTemplate.queryForInt(JdbcTemplate.java:782)         at org.springframework.security.provisioning.JdbcUserDetailsManager.findGroupId(JdbcUserDetailsManager.java:373)         at org.springframework.security.provisioning.JdbcUserDetailsManager.addUserToGroup(JdbcUserDetailsManager.java:301)         at com.emisoft.ami.user.service.impl.UserServiceImpl.insert(UserServiceImpl.java:42)         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)         at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)         at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)         at java.lang.reflect.Method.invoke(Method.java:606)         at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:317)         at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183)         at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)         at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:96)         at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:260)         at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:94)         at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)         at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)         at com.sun.proxy.$Proxy46.insert(Unknown Source)         at com.kulig.test.service.PaymentServiceContext.main(PaymentServiceContext.java:28)     Caused by: java.sql.SQLException: Connection is closed.         at org.apache.commons.dbcp.PoolingDataSource$PoolGuardConnectionWrapper.checkOpen(PoolingDataSource.java:185)         at org.apache.commons.dbcp.PoolingDataSource$PoolGuardConnectionWrapper.prepareStatement(PoolingDataSource.java:312)         at org.springframework.jdbc.core.JdbcTemplate$SimplePreparedStatementCreator.createPreparedStatement(JdbcTemplate.java:1446)         at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:583)         ... 23 more     Exception in thread "main" org.springframework.transaction.TransactionSystemException: Could not roll back JPA transaction; nested exception is javax.persistence.PersistenceException: unexpected error when rollbacking         at org.springframework.orm.jpa.JpaTransactionManager.doRollback(JpaTransactionManager.java:543)         at org.springframework.transaction.support.AbstractPlatformTransactionManager.processRollback(AbstractPlatformTransactionManager.java:846)         at org.springframework.transaction.support.AbstractPlatformTransactionManager.rollback(AbstractPlatformTransactionManager.java:823)         at org.springframework.transaction.interceptor.TransactionAspectSupport.completeTransactionAfterThrowing(TransactionAspectSupport.java:493)         at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:264)         at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:94)         at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)         at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)         at com.sun.proxy.$Proxy46.insert(Unknown Source)         at com.kulig.test.service.PaymentServiceContext.main(PaymentServiceContext.java:28)     Caused by: javax.persistence.PersistenceException: unexpected error when rollbacking         at org.hibernate.ejb.TransactionImpl.rollback(TransactionImpl.java:109)         at org.springframework.orm.jpa.JpaTransactionManager.doRollback(JpaTransactionManager.java:539)         ... 9 more     Caused by: org.hibernate.TransactionException: rollback failed         at org.hibernate.engine.transaction.spi.AbstractTransactionImpl.rollback(AbstractTransactionImpl.java:215)         at org.hibernate.ejb.TransactionImpl.rollback(TransactionImpl.java:106)         ... 10 more     Caused by: org.hibernate.TransactionException: unable to rollback against JDBC connection         at org.hibernate.engine.transaction.internal.jdbc.JdbcTransaction.doRollback(JdbcTransaction.java:167)         at org.hibernate.engine.transaction.spi.AbstractTransactionImpl.rollback(AbstractTransactionImpl.java:209)         ... 11 more     Caused by: java.sql.SQLException: Connection is closed.         at org.apache.commons.dbcp.PoolingDataSource$PoolGuardConnectionWrapper.checkOpen(PoolingDataSource.java:185)         at org.apache.commons.dbcp.PoolingDataSource$PoolGuardConnectionWrapper.rollback(PoolingDataSource.java:322)         at org.hibernate.engine.transaction.internal.jdbc.JdbcTransaction.doRollback(JdbcTransaction.java:163)         ... 12 more

EDIT I checked secondJDBCTemplateQuery in stacktrace.

EDIT

I use org.springframework.security.provisioning.JdbcUserDetailsManager

firstJDBCTemplateQuery is createUser(UserDetails user)

secondJDBCTemplateQuery is addUserToGroup(String username, String groupName)

public void createUser(final UserDetails user) {         validateUserDetails(user);         getJdbcTemplate().update(createUserSql, new PreparedStatementSetter() {             public void setValues(PreparedStatement ps) throws SQLException {                 ps.setString(1, user.getUsername());                 ps.setString(2, user.getPassword());                 ps.setBoolean(3, user.isEnabled());             }          });          if (getEnableAuthorities()) {             insertUserAuthorities(user);         }     }   public void addUserToGroup(final String username, final String groupName) {         logger.debug("Adding user '" + username + "' to group '" + groupName + "'");         Assert.hasText(username);         Assert.hasText(groupName);          final int id = findGroupId(groupName);         getJdbcTemplate().update(insertGroupMemberSql, new PreparedStatementSetter() {             public void setValues(PreparedStatement ps) throws SQLException {                 ps.setInt(1, id);                 ps.setString(2, username);             }         });          userCache.removeUserFromCache(username);     }

EDIT DEBUG RESULT:

Beigin transaction on startup myMethod():

DEBUG: org.springframework.orm.jpa.JpaTransactionManager - Creating new transaction with name [com.emisoft.ami.user.service.impl.UserServiceImpl.insert]: PROPAGATION_REQUIRED,ISOLATION_DEFAULT; '' DEBUG: org.springframework.orm.jpa.JpaTransactionManager - Opened new EntityManager [org.hibernate.ejb.EntityManagerImpl@b18ac9] for JPA transaction DEBUG: org.hibernate.engine.transaction.spi.AbstractTransactionImpl - begin DEBUG: org.hibernate.engine.jdbc.internal.LogicalConnectionImpl - Obtaining JDBC connection DEBUG: org.hibernate.engine.jdbc.internal.LogicalConnectionImpl - Obtained JDBC connection DEBUG: org.hibernate.engine.transaction.internal.jdbc.JdbcTransaction - initial autocommit status: true DEBUG: org.hibernate.engine.transaction.internal.jdbc.JdbcTransaction - disabling autocommit DEBUG: org.springframework.orm.jpa.JpaTransactionManager - Exposing JPA transaction as JDBC transaction [org.springframework.orm.jpa.vendor.HibernateJpaDialect$HibernateConnectionHandle@940dc4]

////////////////////////////////// firstJDBCTemplateMethod: //////////////////////////////////

DEBUG: org.springframework.jdbc.core.JdbcTemplate - Executing prepared SQL update DEBUG: org.springframework.jdbc.core.JdbcTemplate - Executing prepared SQL statement [insert into users (username, password, enabled) values (?,?,?)] DEBUG: org.springframework.jdbc.core.JdbcTemplate - SQL update affected 1 rows

///////////////////////////////////////// secondJDBCTemplateMethod: ////////////////////////////////////

DEBUG: org.springframework.jdbc.core.JdbcTemplate - Executing prepared SQL query DEBUG: org.springframework.jdbc.core.JdbcTemplate - Executing prepared SQL statement [select id from groups where group_name = ?] INFO : org.springframework.beans.factory.xml.XmlBeanDefinitionReader - Loading XML bean definitions from class path resource [org/springframework/jdbc/support/sql-error-codes.xml] INFO : org.springframework.jdbc.support.SQLErrorCodesFactory - SQLErrorCodes loaded: [DB2, Derby, H2, HSQL, Informix, MS-SQL, MySQL, Oracle, PostgreSQL, Sybase] DEBUG: org.springframework.jdbc.support.SQLErrorCodesFactory - Looking up default SQLErrorCodes for DataSource [org.apache.commons.dbcp.BasicDataSource@150f6f] WARN : org.springframework.jdbc.support.SQLErrorCodesFactory - Error while extracting database product name - falling back to empty error codes org.springframework.jdbc.support.MetaDataAccessException: Error while extracting DatabaseMetaData; nested exception is java.sql.SQLException: Connection is closed. ///This is the beginning of stacktrace which is located above.

EDIT PaymentServiceContext :

public class PaymentServiceContext {     public static void main(String[] args) {         ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(                 "com/kulig/test/service/PaymentServiceTest-context.xml");          UserService userService = context.getBean(UserService.class);         ///CREATE POJO OBJECTS credentials and p                 ...         userService.insert(credentials, p);      }  }

回答1:

Actually, I have had that same issue recently...

After debugging trough the Hibernate code, I noticed Hibernate 4 calls HibernateJpaDialect.releaseConnection at some point. Comments before suggest that it's only to release the connection, but not to close it since it's the connection used by the transactional context. However, that releaseConnection method does in fact call JdbcUtils.closeConnection(con). The HibernateJpaDialect class responsible is actually part of the spring framework, not hibernate.

In the end, this issue is reported by Spring as a bug (SPR-10395) and should be fixed in release 3.2.3 or above. So in the end, you can use Hibernate 4.2 but you'll have to upgrade spring (orm) in that case:

<dependency>     <groupId>org.springframework</groupId>     <artifactId>spring-orm</artifactId>     <version>3.2.3</version> </dependency>

回答2:

I think that there is a bug in hibernate. I changed

<dependency>     <groupId>org.hibernate</groupId>     <artifactId>hibernate-entitymanager</artifactId>     <version>4.2.5.Final</version> </dependency>

<dependency>     <groupId>org.hibernate</groupId>     <artifactId>hibernate-entitymanager</artifactId>     <version>4.1.12.Final</version> </dependency>

and it works.

回答3:

Comparison of 2 different version of HibernateJpaDialect from spring-orm artifact. Thanks to @Kevin Chabot for pointing this out:

HibernateJpaDialect (spring-orm ver 3.1.4)

public void releaseConnection(Connection con) {     JdbcUtils.closeConnection(con); }

HibernateJpaDialect (spring-orm ver 3.2.8)

public void releaseConnection(Connection con) {     if (sessionConnectionMethod != null) {         // Need to explicitly call close() with Hibernate 3.x in order to allow         // for eager release of the underlying physical Connection if necessary.         // However, do not do this on Hibernate 4.2+ since it would return the         // physical Connection to the pool right away, making it unusable for         // further operations within the current transaction!         JdbcUtils.closeConnection(con);     } }

Switching to spring-orm 3.2.3+ solves this problem. Be careful to include spring-orm in your pom.xml explicitly. The common mistake is when pom.xml contains only spring-data and fetches spring-orm thru transitive dependency from spring-data - and than it may be in wrong version.

回答4:

First of all make sure that you are using the same DataSource for JPA as for your JdbcTemplate. Next wire the DataSource to the JpaTransactionManager.

<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">     <property name="entityManagerFactory" ref="emf" />     <property name="dataSource" ref="dataSource" />         </bean>

This will make the transaction managed by the same transaction manager (you should only have one transaction manage

文章来源: JdbcTemplate query close database connection

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