hibernate的 openSession 和 getCurrentSession
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1、hibernate执行过程
2、getCurrentSession() 与 openSession() 区别
3、测试 openSession
4、测试 getCurrentSession
4.1、报错：Calling method \'createQuery\' is not valid without an active transaction (Current status: NOT_ACTIVE)"
4.2、报错 ERROR (AbstractPlatformTransactionManager.java:905) : Commit exception overridden by rollback exception
1、hibernate执行过程 <--返回目录
1）应用程序先调用 Configuration 类，该类读取 Hibernate 的配置文件及映射文件中的信息，并用这些信息生成一个 SessionFactory 对象
2）利用 SessionFactory 对象得到 session 对象，两种方式：getCurrentSession()与 openSession()
3）session 对象开启事务，得到一个事务对象：Transaction tx= session.beginTransaction();
4）利用session对象的方法 get load save delete 操作 pojo 实体类
5）事务提交 + session.close() + sessionfactory.close()
2、getCurrentSession() 与 openSession() 区别 <--返回目录
1）getCurrentSession 创建的 session 会绑定到当前线程, 而 openSession 不会。
2）getCurrentSession 创建的线程会在事务回滚或事物提交后自动关闭,而 openSession 必须手动关闭（session.close）
3）openSession()打开的是新的 session, getCurrentSession 会先从上下文找，有 session 就拿过来用，没有就创造新的 session
4）使用getCurrentSession()必须开启事物。否则抛出异常org.hibernate.HibernateException:createQuery is not valid without active transaction
3、测试 openSession <--返回目录
使用openSession() 获取 session, 注释掉 session.close()， 访问测试
@Override public List<FactComsumption> getFactComsumptionList(Integer companyId, Integer merchantId, Integer cityId, String startDate, String endDate) { Session session = this.getHibernateTemplate().getSessionFactory().openSession(); List<FactComsumption> list = FacadeFunctions.getFactTableListByDateInterval(session, FactComsumption.class, "FactComsumption", companyId, merchantId, cityId, startDate, endDate); // session.close(); return list; }
多次访问进行测试，测试发现第 5 次就会出现下面的情况
异常栈信息 Caused by: org.postgresql.util.PSQLException: 致命错误: 对不起, 已经有太多的客户
09:42:29.045 WARN (ConnectionFactoryImpl.java :317) : SQLException occurred while connecting to localhost:5432 org.postgresql.util.PSQLException: 致命错误: 对不起, 已经有太多的客户 (pgjdbc: autodetected server-encoding to be GB2312, if the message is not readable, please check database logs and/or host, port, dbname, user, password, pg_hba.conf) at org.postgresql.core.v3.ConnectionFactoryImpl.doAuthentication(ConnectionFactoryImpl.java:473) at org.postgresql.core.v3.ConnectionFactoryImpl.openConnectionImpl(ConnectionFactoryImpl.java:205) at org.postgresql.core.ConnectionFactory.openConnection(ConnectionFactory.java:49) at org.postgresql.jdbc.PgConnection.<init>(PgConnection.java:195) at org.postgresql.Driver.makeConnection(Driver.java:452) at org.postgresql.Driver.connect(Driver.java:254) at org.apache.commons.dbcp.DriverConnectionFactory.createConnection(DriverConnectionFactory.java:38) at org.apache.commons.dbcp.PoolableConnectionFactory.makeObject(PoolableConnectionFactory.java:582) at org.apache.commons.pool.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:1148) at org.apache.commons.dbcp.PoolingDataSource.getConnection(PoolingDataSource.java:106) at org.apache.commons.dbcp.BasicDataSource.getConnection(BasicDataSource.java:1044) at org.hibernate.engine.jdbc.connections.internal.DatasourceConnectionProviderImpl.getConnection(DatasourceConnectionProviderImpl.java:122) at org.hibernate.internal.NonContextualJdbcConnectionAccess.obtainConnection(NonContextualJdbcConnectionAccess.java:35) at org.hibernate.resource.jdbc.internal.LogicalConnectionManagedImpl.acquireConnectionIfNeeded(LogicalConnectionManagedImpl.java:106) at org.hibernate.resource.jdbc.internal.LogicalConnectionManagedImpl.getPhysicalConnection(LogicalConnectionManagedImpl.java:136) at org.hibernate.engine.jdbc.internal.StatementPreparerImpl.connection(StatementPreparerImpl.java:47) at org.hibernate.engine.jdbc.internal.StatementPreparerImpl$5.doPrepare(StatementPreparerImpl.java:146) at org.hibernate.engine.jdbc.internal.StatementPreparerImpl$StatementPreparationTemplate.prepareStatement(StatementPreparerImpl.java:172) at org.hibernate.engine.jdbc.internal.StatementPreparerImpl.prepareQueryStatement(StatementPreparerImpl.java:148) at org.hibernate.loader.Loader.prepareQueryStatement(Loader.java:1984) at org.hibernate.loader.Loader.executeQueryStatement(Loader.java:1914) at org.hibernate.loader.Loader.executeQueryStatement(Loader.java:1892) at org.hibernate.loader.Loader.doQuery(Loader.java:937) at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:340) at org.hibernate.loader.Loader.doList(Loader.java:2689) at org.hibernate.loader.Loader.doList(Loader.java:2672) at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2506) at org.hibernate.loader.Loader.list(Loader.java:2501) at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:504) at org.hibernate.hql.internal.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:395) at org.hibernate.engine.query.spi.HQLQueryPlan.performList(HQLQueryPlan.java:220) at org.hibernate.internal.SessionImpl.list(SessionImpl.java:1508) at org.hibernate.query.internal.AbstractProducedQuery.doList(AbstractProducedQuery.java:1537) at org.hibernate.query.internal.AbstractProducedQuery.list(AbstractProducedQuery.java:1505) at com.sanlian.bigdata.facade.support.FacadeFunctions.getFactTableListByDateInterval(FacadeFunctions.java:67) at com.sanlian.bigdata.facade.impl.FactComsumptionFacadeImpl.getFactComsumptionList(FactComsumptionFacadeImpl.java:39) at com.sanlian.bigdata.service.impl.FactComsumptionServiceImpl.lambda$getDailyComsumpOfCity$1(FactComsumptionServiceImpl.java:53) at java.util.ArrayList.forEach(ArrayList.java:1249) at com.sanlian.bigdata.service.impl.FactComsumptionServiceImpl.getDailyComsumpOfCity(FactComsumptionServiceImpl.java:48) at com.sanlian.bigdata.ctrl.FactComsumptionController.getComsumpOfCity(FactComsumptionController.java:130) at com.sanlian.bigdata.ctrl.FactComsumptionController$$FastClassBySpringCGLIB$$f540f0dc.invoke(<generated>) at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218) at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:749) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163) at org.springframework.aop.framework.adapter.MethodBeforeAdviceInterceptor.invoke(MethodBeforeAdviceInterceptor.java:56) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) at org.springframework.aop.framework.adapter.MethodBeforeAdviceInterceptor.invoke(MethodBeforeAdviceInterceptor.java:56) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:688) at com.sanlian.bigdata.ctrl.FactComsumptionController$$EnhancerBySpringCGLIB$$686410b5.getComsumpOfCity(<generated>) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at com.guanxin.web.container.ctrl.PlatformController.execute(PlatformController.java:366) at com.guanxin.web.container.ctrl.PlatformController.handleRequestInternal(PlatformController.java:263) at org.springframework.web.servlet.mvc.AbstractController.handleRequest(AbstractController.java:177) at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:52) at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:991) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:925) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:974) at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:866) at javax.servlet.http.HttpServlet.service(HttpServlet.java:635) at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:851) at javax.servlet.http.HttpServlet.service(HttpServlet.java:742) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at com.guanxin.web.container.filter.PluginsFilter.doFilter(PluginsFilter.java:95) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at com.guanxin.web.container.filter.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:19) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at com.guanxin.web.container.filter.NoCacheFilter.doFilter(NoCacheFilter.java:36) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:493) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81) at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:650) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342) at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:800) at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:806) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1498) at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Thread.java:745) 09:42:29.048 ERROR (Driver.java :263) : Connection error: org.postgresql.util.PSQLException: 致命错误: 对不起, 已经有太多的客户 (pgjdbc: autodetected server-encoding to be GB2312, if the message is not readable, please check database logs and/or host, port, dbname, user, password, pg_hba.conf) at org.postgresql.core.v3.ConnectionFactoryImpl.doAuthentication(ConnectionFactoryImpl.java:473) at org.postgresql.core.v3.ConnectionFactoryImpl.openConnectionImpl(ConnectionFactoryImpl.java:205) at org.postgresql.core.ConnectionFactory.openConnection(ConnectionFactory.java:49) at org.postgresql.jdbc.PgConnection.<init>(PgConnection.java:195) at org.postgresql.Driver.makeConnection(Driver.java:452) at org.postgresql.Driver.connect(Driver.java:254) at org.apache.commons.dbcp.DriverConnectionFactory.createConnection(DriverConnectionFactory.java:38) at org.apache.commons.dbcp.PoolableConnectionFactory.makeObject(PoolableConnectionFactory.java:582) at org.apache.commons.pool.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:1148) at org.apache.commons.dbcp.PoolingDataSource.getConnection(PoolingDataSource.java:106) at org.apache.commons.dbcp.BasicDataSource.getConnection(BasicDataSource.java:1044) at org.hibernate.engine.jdbc.connections.internal.DatasourceConnectionProviderImpl.getConnection(DatasourceConnectionProviderImpl.java:122) at org.hibernate.internal.NonContextualJdbcConnectionAccess.obtainConnection(NonContextualJdbcConnectionAccess.java:35) at org.hibernate.resource.jdbc.internal.LogicalConnectionManagedImpl.acquireConnectionIfNeeded(LogicalConnectionManagedImpl.java:106) at org.hibernate.resource.jdbc.internal.LogicalConnectionManagedImpl.getPhysicalConnection(LogicalConnectionManagedImpl.java:136) at org.hibernate.engine.jdbc.internal.StatementPreparerImpl.connection(StatementPreparerImpl.java:47) at org.hibernate.engine.jdbc.internal.StatementPreparerImpl$5.doPrepare(StatementPreparerImpl.java:146) at org.hibernate.engine.jdbc.internal.StatementPreparerImpl$StatementPreparationTemplate.prepareStatement(StatementPreparerImpl.java:172) at org.hibernate.engine.jdbc.internal.StatementPreparerImpl.prepareQueryStatement(StatementPreparerImpl.java:148) at org.hibernate.loader.Loader.prepareQueryStatement(Loader.java:1984) at org.hibernate.loader.Loader.executeQueryStatement(Loader.java:1914) at org.hibernate.loader.Loader.executeQueryStatement(Loader.java:1892) at org.hibernate.loader.Loader.doQuery(Loader.java:937) at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:340) at org.hibernate.loader.Loader.doList(Loader.java:2689) at org.hibernate.loader.Loader.doList(Loader.java:2672) at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2506) at org.hibernate.loader.Loader.list(Loader.java:2501) at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:504) at org.hibernate.hql.internal.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:395) at org.hibernate.engine.query.spi.HQLQueryPlan.performList(HQLQueryPlan.java:220) at org.hibernate.internal.SessionImpl.list(SessionImpl.java:1508) at org.hibernate.query.internal.AbstractProducedQuery.doList(AbstractProducedQuery.java:1537) at org.hibernate.query.internal.AbstractProducedQuery.list(AbstractProducedQuery.java:1505) at com.sanlian.bigdata.facade.support.FacadeFunctions.getFactTableListByDateInterval(FacadeFunctions.java:67) at com.sanlian.bigdata.facade.impl.FactComsumptionFacadeImpl.getFactComsumptionList(FactComsumptionFacadeImpl.java:39) at com.sanlian.bigdata.service.impl.FactComsumptionServiceImpl.lambda$getDailyComsumpOfCity$1(FactComsumptionServiceImpl.java:53) at java.util.ArrayList.forEach(ArrayList.java:1249) at com.sanlian.bigdata.service.impl.FactComsumptionServiceImpl.getDailyComsumpOfCity(FactComsumptionServiceImpl.java:48) at com.sanlian.bigdata.ctrl.FactComsumptionController.getComsumpOfCity(FactComsumptionController.java:130) at com.sanlian.bigdata.ctrl.FactComsumptionController$$FastClassBySpringCGLIB$$f540f0dc.invoke(<generated>) at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218) at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:749) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163) at org.springframework.aop.framework.adapter.MethodBeforeAdviceInterceptor.invoke(MethodBeforeAdviceInterceptor.java:56) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) at org.springframework.aop.framework.adapter.MethodBeforeAdviceInterceptor.invoke(MethodBeforeAdviceInterceptor.java:56) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:688) at com.sanlian.bigdata.ctrl.FactComsumptionController$$EnhancerBySpringCGLIB$$686410b5.getComsumpOfCity(<generated>) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at com.guanxin.web.container.ctrl.PlatformController.execute(PlatformController.java:366) at com.guanxin.web.container.ctrl.PlatformController.handleRequestInternal(PlatformController.java:263) at org.springframework.web.servlet.mvc.AbstractController.handleRequest(AbstractController.java:177) at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:52) at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:991) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:925) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:974) at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:866) at javax.servlet.http.HttpServlet.service(HttpServlet.java:635) at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:851) at javax.servlet.http.HttpServlet.service(HttpServlet.java:742) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at com.guanxin.web.container.filter.PluginsFilter.doFilter(PluginsFilter.java:95) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at com.guanxin.web.container.filter.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:19) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at com.guanxin.web.container.filter.NoCacheFilter.doFilter(NoCacheFilter.java:36) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:493) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81) at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:650) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342) at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:800) at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:806) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1498) at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Thread.java:745) 09:42:29.057 WARN (SqlExceptionHelper.java :137) : SQL Error: 0, SQLState: 53300 09:42:29.057 ERROR (SqlExceptionHelper.java :142) : 致命错误: 对不起, 已经有太多的客户 (pgjdbc: autodetected server-encoding to be GB2312, if the message is not readable, please check database logs and/or host, port, dbname, user, password, pg_hba.conf) 09:42:29.065 ERROR (DefaultExceptionHandler.java :56) : org.hibernate.exception.GenericJDBCException: Unable to acquire JDBC Connection javax.persistence.PersistenceException: org.hibernate.exception.GenericJDBCException: Unable to acquire JDBC Connection at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:154) at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:181) at org.hibernate.query.internal.AbstractProducedQuery.list(AbstractProducedQuery.java:1514) at com.sanlian.bigdata.facade.support.FacadeFunctions.getFactTableListByDateInterval(FacadeFunctions.java:67) at com.sanlian.bigdata.facade.impl.FactComsumptionFacadeImpl.getFactComsumptionList(FactComsumptionFacadeImpl.java:39) at com.sanlian.bigdata.service.impl.FactComsumptionServiceImpl.lambda$getDailyComsumpOfCity$1(FactComsumptionServiceImpl.java:53) at java.util.ArrayList.forEach(ArrayList.java:1249) at com.sanlian.bigdata.service.impl.FactComsumptionServiceImpl.getDailyComsumpOfCity(FactComsumptionServiceImpl.java:48) at com.sanlian.bigdata.ctrl.FactComsumptionController.getComsumpOfCity(FactComsumptionController.java:130) at com.sanlian.bigdata.ctrl.FactComsumptionController$$FastClassBySpringCGLIB$$f540f0dc.invoke(<generated>) at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218) at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:749) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163) at org.springframework.aop.framework.adapter.MethodBeforeAdviceInterceptor.invoke(MethodBeforeAdviceInterceptor.java:56) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) at org.springframework.aop.framework.adapter.MethodBeforeAdviceInterceptor.invoke(MethodBeforeAdviceInterceptor.java:56) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:688) at com.sanlian.bigdata.ctrl.FactComsumptionController$$EnhancerBySpringCGLIB$$686410b5.getComsumpOfCity(<generated>) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at com.guanxin.web.container.ctrl.PlatformController.execute(PlatformController.java:366) at com.guanxin.web.container.ctrl.PlatformController.handleRequestInternal(PlatformController.java:263) at org.springframework.web.servlet.mvc.AbstractController.handleRequest(AbstractController.java:177) at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:52) at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:991) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:925) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:974) at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:866) at javax.servlet.http.HttpServlet.service(HttpServlet.java:635) at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:851) at javax.servlet.http.HttpServlet.service(HttpServlet.java:742) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at com.guanxin.web.container.filter.PluginsFilter.doFilter(PluginsFilter.java:95) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at com.guanxin.web.container.filter.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:19) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at com.guanxin.web.container.filter.NoCacheFilter.doFilter(NoCacheFilter.java:36) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:493) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81) at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:650) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342) at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:800) at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:806) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1498) at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Thread.java:745) Caused by: org.hibernate.exception.GenericJDBCException: Unable to acquire JDBC Connection at org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:47) at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:113) at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:99) at org.hibernate.resource.jdbc.internal.LogicalConnectionManagedImpl.acquireConnectionIfNeeded(LogicalConnectionManagedImpl.java:109) at org.hibernate.resource.jdbc.internal.LogicalConnectionManagedImpl.getPhysicalConnection(LogicalConnectionManagedImpl.java:136) at org.hibernate.engine.jdbc.internal.StatementPreparerImpl.connection(StatementPreparerImpl.java:47) at org.hibernate.engine.jdbc.internal.StatementPreparerImpl$5.doPrepare(StatementPreparerImpl.java:146) at org.hibernate.engine.jdbc.internal.StatementPreparerImpl$StatementPreparationTemplate.prepareStatement(StatementPreparerImpl.java:172) at org.hibernate.engine.jdbc.internal.StatementPreparerImpl.prepareQueryStatement(StatementPreparerImpl.java:148) at org.hibernate.loader.Loader.prepareQueryStatement(Loader.java:1984) at org.hibernate.loader.Loader.executeQueryStatement(Loader.java:1914) at org.hibernate.loader.Loader.executeQueryStatement(Loader.java:1892) at org.hibernate.loader.Loader.doQuery(Loader.java:937) at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:340) at org.hibernate.loader.Loader.doList(Loader.java:2689) at org.hibernate.loader.Loader.doList(Loader.java:2672) at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2506) at org.hibernate.loader.Loader.list(Loader.java:2501) at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:504) at org.hibernate.hql.internal.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:395) at org.hibernate.engine.query.spi.HQLQueryPlan.performList(HQLQueryPlan.java:220) at org.hibernate.internal.SessionImpl.list(SessionImpl.java:1508) at org.hibernate.query.internal.AbstractProducedQuery.doList(AbstractProducedQuery.java:1537) at org.hibernate.query.internal.AbstractProducedQuery.list(AbstractProducedQuery.java:1505) ... 62 common frames omitted Caused by: org.postgresql.util.PSQLException: 致命错误: 对不起, 已经有太多的客户 (pgjdbc: autodetected server-encoding to be GB2312, if the message is not readable, please check database logs and/or host, port, dbname, user, password, pg_hba.conf) at org.postgresql.core.v3.ConnectionFactoryImpl.doAuthentication(ConnectionFactoryImpl.java:473) at org.postgresql.core.v3.ConnectionFactoryImpl.openConnectionImpl(ConnectionFactoryImpl.java:205) at org.postgresql.core.ConnectionFactory.openConnection(ConnectionFactory.java:49) at org.postgresql.jdbc.PgConnection.<init>(PgConnection.java:195) at org.postgresql.Driver.makeConnection(Driver.java:452) at org.postgresql.Driver.connect(Driver.java:254) at org.apache.commons.dbcp.DriverConnectionFactory.createConnection(DriverConnectionFactory.java:38) at org.apache.commons.dbcp.PoolableConnectionFactory.makeObject(PoolableConnectionFactory.java:582) at org.apache.commons.pool.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:1148) at org.apache.commons.dbcp.PoolingDataSource.getConnection(PoolingDataSource.java:106) at org.apache.commons.dbcp.BasicDataSource.getConnection(BasicDataSource.java:1044) at org.hibernate.engine.jdbc.connections.internal.DatasourceConnectionProviderImpl.getConnection(DatasourceConnectionProviderImpl.java:122) at org.hibernate.internal.NonContextualJdbcConnectionAccess.obtainConnection(NonContextualJdbcConnectionAccess.java:35) at org.hibernate.resource.jdbc.internal.LogicalConnectionManagedImpl.acquireConnectionIfNeeded(LogicalConnectionManagedImpl.java:106) ... 82 common frames omitted
业务 service 会多次调用 dao 层的方法，session 没有关闭的话，很快就会用尽
4、测试 getCurrentSession <--返回目录
@Override public List<FactComsumption> getFactComsumptionList(Integer companyId, Integer merchantId, Integer cityId, String startDate, String endDate) { Session session = this.getHibernateTemplate().getSessionFactory().getCurrentSession(); List<FactComsumption> list = FacadeFunctions.getFactTableListByDateInterval(session, FactComsumption.class, "FactComsumption", companyId, merchantId, cityId, startDate, endDate); // session.close(); return list; }
4.1、报错：Calling method \'createQuery\' is not valid without an active transaction (Current status: NOT_ACTIVE)" <--返回目录
10:44:13.402 ERROR (DefaultExceptionHandler.java :56) : Calling method \'createQuery\' is not valid without an active transaction (Current status: NOT_ACTIVE) org.hibernate.HibernateException: Calling method \'createQuery\' is not valid without an active transaction (Current status: NOT_ACTIVE) at org.hibernate.context.internal.ThreadLocalSessionContext$TransactionProtectionWrapper.invoke(ThreadLocalSessionContext.java:346) at com.sun.proxy.$Proxy150.createQuery(Unknown Source) at com.sanlian.bigdata.facade.support.FacadeFunctions.getFactTableListByDateInterval(FacadeFunctions.java:55) at com.sanlian.bigdata.facade.impl.FactComsumptionFacadeImpl.getFactComsumptionList(FactComsumptionFacadeImpl.java:39) at com.sanlian.bigdata.service.impl.FactComsumptionServiceImpl.lambda$getDailyComsumpOfCity$1(FactComsumptionServiceImpl.java:53) at java.lang.Thread.run(Thread.java:745)
解决：https://blog.csdn.net/maoyuanming0806/article/details/61417995
4.2、报错 ERROR (AbstractPlatformTransactionManager.java:905) : Commit exception overridden by rollback exception <--返回目录
dao 代码
@Override public Task getByName(String taskName) { logger.info("TaskFacadeImpl#getByName"); Session session = this.getSessionFactory().getCurrentSession(); Query query = session.createQuery("from Task where task_name=:taskName"); query.setParameter("taskName", taskName); List<Task> taskList = query.list(); session.close(); return taskList != null && taskList.size() > 0 ? taskList.get(0) : null; }
service 层都添加了事务，所以不需要手动 session.close()
参考：
1）spring管理hibernate的事务（声明注解实现）
3) 例说Hibernate的openSession和getCurrentSession区别
以上是关于hibernate的 openSession 和 getCurrentSession的主要内容，如果未能解决你的问题，请参考以下文章
Hibernate中getCurrentSession()与openSession()的区别及应用
hibernate 的SessionFactory的getCurrentSession 与 openSession() 的区别
hibernate 的SessionFactory的getCurrentSession 与 openSession() 的区别
java.lang.NoSuchMethodError: org.hibernate.SessionFactory.openSession()Lorg/hibernate/classic/Sessio