我使用jpa和hibernate。我有以下方法：
@Transactional
public void myMethod(){
...
firstJDBCTemplateQuery();
secondJDBCTemplateQuery();
...
}
firstJDBCTemplateQuery有效，但它会关闭与数据库的连接。第二个secondJDBCTempolateQuery执行时
java.sql.SQLException: Connection is closed exception
抛出导致
的原因 org.springframework.transaction.TransactionSystemException: Could not roll back JPA transaction ...
我的配置： 编辑
<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" />
...
我不知道为什么'firstJDBCTemplateQuery'关闭数据库连接。如何解决这个问题？
堆栈跟踪：
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
修改
我在stacktrace中检查了secondJDBCTemplateQuery。
修改
我使用org.springframework.security.provisioning.JdbcUserDetailsManager
firstJDBCTemplateQuery是createUser(UserDetails user)
secondJDBCTemplateQuery是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);
}
编辑调试结果：
启动时的Beigin交易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.
修改
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);
}
}
答案 0 :(得分：5)
实际上，我最近也有同样的问题......
通过Hibernate代码调试后，我注意到Hibernate 4在某些时候调用了HibernateJpaDialect.releaseConnection。之前的注释表明它只是释放连接，而不是关闭它，因为它是事务上下文使用的连接。但是，该releaseConnection方法实际上调用了JdbcUtils.closeConnection（con）。负责的HibernateJpaDialect类实际上是spring框架的一部分，而不是hibernate。
最后，Spring将此问题报告为错误（SPR-10395），并应在3.2.3或更高版本中修复。所以最后，你可以使用Hibernate 4.2，但在这种情况下你必须升级spring（orm）：
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>3.2.3</version>
</dependency>
答案 1 :(得分：1)
我认为hibernate中存在一个错误。我改变了
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<version>4.2.5.Final</version>
</dependency>
到
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<version>4.1.12.Final</version>
</dependency>
它有效。
答案 2 :(得分：1)
从spring-orm工件中比较2种不同版本的HibernateJpaDialect。 感谢@Kevin Chabot指出这一点：
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);
}
}
切换到spring-orm 3.2.3+解决了这个问题。注意在pom.xml中明确包含spring-orm。常见的错误是当pom.xml仅包含spring-data并从spring-orm获取spring-data到传递依赖时 - 而且它可能是错误的版本。
答案 3 :(得分：0)
首先请确保您使用的JPA DataSource与JdbcTemplate相同。接下来将DataSource连接到JpaTransactionManager。
<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="emf" />
<property name="dataSource" ref="dataSource" />
</bean>
这将使事务由同一个事务管理器管理（您应该只有一个事务管理