Не удалось открыть сеанс Hibernate для транзакции

Question

Я получаю эту ошибку. пожалуйста помогите.

org.springframework.transaction.CannotCreateTransactionException: Could not open Hibernate Session for transaction; nested exception is org.hibernate.exception.GenericJDBCException: Cannot open connection 
org.springframework.orm.hibernate3.HibernateTransactionManager.doBegin(HibernateTransactionManager.java:599) 
org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:374) 
org.springframework.transaction.interceptor.TransactionAspectSupport.createTransactionIfNecessary(TransactionAspectSupport.java:263) 
org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:101) 
org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171) 
org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204) 
$Proxy20.findFlierByID(Unknown Source) 
servlets.AwardServlet.doGet(AwardServlet.java:34) 
javax.servlet.http.HttpServlet.service(HttpServlet.java:617) 
javax.servlet.http.HttpServlet.service(HttpServlet.java:717) 
root cause 

org.hibernate.exception.GenericJDBCException: Cannot open connection 
org.hibernate.exception.SQLStateConverter.handledNonSpecificException(SQLStateConverter.java:126) 
org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:114) 
org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66) 
org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:52) 
org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:449) 
org.hibernate.jdbc.ConnectionManager.getConnection(ConnectionManager.java:167) 
org.hibernate.jdbc.JDBCContext.connection(JDBCContext.java:142) 
org.hibernate.transaction.JDBCTransaction.begin(JDBCTransaction.java:85) 
org.hibernate.impl.SessionImpl.beginTransaction(SessionImpl.java:1354) 
org.springframework.orm.hibernate3.HibernateTransactionManager.doBegin(HibernateTransactionManager.java:558) 
org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:374) 
org.springframework.transaction.interceptor.TransactionAspectSupport.createTransactionIfNecessary(TransactionAspectSupport.java:263) 
org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:101) 
org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171) 
org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204) 
$Proxy20.findFlierByID(Unknown Source) 
servlets.AwardServlet.doGet(AwardServlet.java:34) 
javax.servlet.http.HttpServlet.service(HttpServlet.java:617) 
javax.servlet.http.HttpServlet.service(HttpServlet.java:717) 
root cause 

org.apache.tomcat.dbcp.dbcp.SQLNestedException: Cannot create JDBC driver of class '' for connect URL 'null' 
org.apache.tomcat.dbcp.dbcp.BasicDataSource.createConnectionFactory(BasicDataSource.java:1452) 
org.apache.tomcat.dbcp.dbcp.BasicDataSource.createDataSource(BasicDataSource.java:1371) 
org.apache.tomcat.dbcp.dbcp.BasicDataSource.getConnection(BasicDataSource.java:1044) 
org.springframework.orm.hibernate3.LocalDataSourceConnectionProvider.getConnection(LocalDataSourceConnectionProvider.java:82) 
org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:446) 
org.hibernate.jdbc.ConnectionManager.getConnection(ConnectionManager.java:167) 
org.hibernate.jdbc.JDBCContext.connection(JDBCContext.java:142) 
org.hibernate.transaction.JDBCTransaction.begin(JDBCTransaction.java:85) 
org.hibernate.impl.SessionImpl.beginTransaction(SessionImpl.java:1354) 
org.springframework.orm.hibernate3.HibernateTransactionManager.doBegin(HibernateTransactionManager.java:558) 
org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:374) 
org.springframework.transaction.interceptor.TransactionAspectSupport.createTransactionIfNecessary(TransactionAspectSupport.java:263) 
org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:101) 
org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171) 
org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204) 
$Proxy20.findFlierByID(Unknown Source) 
servlets.AwardServlet.doGet(AwardServlet.java:34) 
javax.servlet.http.HttpServlet.service(HttpServlet.java:617) 
javax.servlet.http.HttpServlet.service(HttpServlet.java:717) 
root cause 

java.lang.NullPointerException 
sun.jdbc.odbc.JdbcOdbcDriver.getProtocol(Unknown Source) 
sun.jdbc.odbc.JdbcOdbcDriver.knownURL(Unknown Source) 
sun.jdbc.odbc.JdbcOdbcDriver.acceptsURL(Unknown Source) 
java.sql.DriverManager.getDriver(Unknown Source) 
org.apache.tomcat.dbcp.dbcp.BasicDataSource.createConnectionFactory(BasicDataSource.java:1437) 
org.apache.tomcat.dbcp.dbcp.BasicDataSource.createDataSource(BasicDataSource.java:1371) 
org.apache.tomcat.dbcp.dbcp.BasicDataSource.getConnection(BasicDataSource.java:1044) 
org.springframework.orm.hibernate3.LocalDataSourceConnectionProvider.getConnection(LocalDataSourceConnectionProvider.java:82) 
org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:446) 
org.hibernate.jdbc.ConnectionManager.getConnection(ConnectionManager.java:167) 
org.hibernate.jdbc.JDBCContext.connection(JDBCContext.java:142) 
org.hibernate.transaction.JDBCTransaction.begin(JDBCTransaction.java:85) 
org.hibernate.impl.SessionImpl.beginTransaction(SessionImpl.java:1354) 
org.springframework.orm.hibernate3.HibernateTransactionManager.doBegin(HibernateTransactionManager.java:558) 
org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:374) 
org.springframework.transaction.interceptor.TransactionAspectSupport.createTransactionIfNecessary(TransactionAspectSupport.java:263) 
org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:101) 
org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171) 
org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204) 
$Proxy20.findFlierByID(Unknown Source) 
servlets.AwardServlet.doGet(AwardServlet.java:34) 
javax.servlet.http.HttpServlet.service(HttpServlet.java:617) 
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

Я видел много примеров в сети, но я не мог решить эту проблему. поэтому, пожалуйста, помогите мне.

Answer 1

Я недавно столкнулся с этой проблемой. Я узнал, что из-за потери соединения с базой данных из приложения эта ошибка появляется. Возможно, будет некоторая операция, которую вы выполняете, когда DB находится в автономном режиме.

Проверьте связанные параметры соединения.

Надеюсь, это поможет.