I'm using Tomcat, Spring, and Hibernate. The app. uses a DataSource
made available using Tomcat's JNDI and a SessionFactory made
available by Spring in a WebApplicationContext. My application works great and the DataSource is used just fine, but when the SessionFactory
is initialized, I get the following Exceptions. Is there some configuration
issue that would make this occur? It doesn't seem to make my
app. hiccup whatsoever. I just don't like seeing exceptions popup when
I run my apps!!!



21:40:55,525 DEBUG JDBCExceptionReporter:36 - SQL Exception
java.sql.SQLException: Cannot load JDBC driver class 'null'
at org.apache.commons.dbcp.BasicDataSource.createDataSource(BasicDataSource.java:529)
at org.apache.commons.dbcp.BasicDataSource.getConnection(BasicDataSource.java:312)
at org.springframework.orm.hibernate.LocalDataSourceConnectionProvider.getConnection(LocalDataSourceConnectionProvider.java:44)
at net.sf.hibernate.impl.SessionFactoryImpl.<init>(SessionFactoryImpl.java:167)
at net.sf.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:627)
at org.springframework.orm.hibernate.LocalSessionFactoryBean.newSessionFactory(LocalSessionFactoryBean.java:221)
at org.springframework.orm.hibernate.LocalSessionFactoryBean.afterPropertiesSet(LocalSessionFactoryBean.java:189)
at org.springframework.beans.factory.support.AbstractBeanFactory.callLifecycleMethodsIfNecessary(AbstractBeanFactory.java:480)
at org.springframework.beans.factory.support.AbstractBeanFactory.createBean(AbstractBeanFactory.java:304)
at org.springframework.beans.factory.support.AbstractBeanFactory.getSharedInstance(AbstractBeanFactory.java:232)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBeanInternal(AbstractBeanFactory.java:161)
at org.springframework.beans.factory.support.AbstractBeanFactory.resolveReference(AbstractBeanFactory.java:407)
at org.springframework.beans.factory.support.AbstractBeanFactory.resolveValueIfNecessary(AbstractBeanFactory.java:363)
at org.springframework.beans.factory.support.AbstractBeanFactory.applyPropertyValues(AbstractBeanFactory.java:327)
at org.springframework.beans.factory.support.AbstractBeanFactory.createBean(AbstractBeanFactory.java:303)
at org.springframework.beans.factory.support.AbstractBeanFactory.getSharedInstance(AbstractBeanFactory.java:232)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBeanInternal(AbstractBeanFactory.java:161)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:139)
at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:478)
at org.springframework.context.support.AbstractApplicationContext.preInstantiateSingletons(AbstractApplicationContext.java:308)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:234)
at org.springframework.web.context.support.XmlWebApplicationContext.setServletContext(XmlWebApplicationContext.java:121)
at org.springframework.web.context.ContextLoader.initContext(ContextLoader.java:55)
at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:29)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3270)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:3599)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:821)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:807)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:579)
at org.apache.catalina.core.StandardHostDeployer.install(StandardHostDeployer.java:307)
at org.apache.catalina.core.StandardHost.install(StandardHost.java:772)
at org.apache.catalina.startup.HostConfig.deployWARs(HostConfig.java:492)
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:400)
at org.apache.catalina.startup.HostConfig.start(HostConfig.java:718)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:358)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:166)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1196)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:738)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1188)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:347)
at org.apache.catalina.core.StandardService.start(StandardService.java:497)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:2190)
at org.apache.catalina.startup.Catalina.start(Catalina.java:512)
at org.apache.catalina.startup.Catalina.execute(Catalina.java:400)
at org.apache.catalina.startup.Catalina.process(Catalina.java:180)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:203)
21:40:55,535 WARN JDBCExceptionReporter:38 - SQL Error: 0, SQLState: null
21:40:55,535 ERROR JDBCExceptionReporter:46 - Cannot load JDBC driver class 'null'
21:40:55,535 WARN SessionFactoryImpl:178 - Could not obtain connection metadata
java.sql.SQLException: Cannot load JDBC driver class 'null'
at org.apache.commons.dbcp.BasicDataSource.createDataSource(BasicDataSource.java:529)
at org.apache.commons.dbcp.BasicDataSource.getConnection(BasicDataSource.java:312)
at org.springframework.orm.hibernate.LocalDataSourceConnectionProvider.getConnection(LocalDataSourceConnectionProvider.java:44)
at net.sf.hibernate.impl.SessionFactoryImpl.<init>(SessionFactoryImpl.java:167)
at net.sf.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:627)
at org.springframework.orm.hibernate.LocalSessionFactoryBean.newSessionFactory(LocalSessionFactoryBean.java:221)
at org.springframework.orm.hibernate.LocalSessionFactoryBean.afterPropertiesSet(LocalSessionFactoryBean.java:189)
at org.springframework.beans.factory.support.AbstractBeanFactory.callLifecycleMethodsIfNecessary(AbstractBeanFactory.java:480)
at org.springframework.beans.factory.support.AbstractBeanFactory.createBean(AbstractBeanFactory.java:304)
at org.springframework.beans.factory.support.AbstractBeanFactory.getSharedInstance(AbstractBeanFactory.java:232)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBeanInternal(AbstractBeanFactory.java:161)
at org.springframework.beans.factory.support.AbstractBeanFactory.resolveReference(AbstractBeanFactory.java:407)
at org.springframework.beans.factory.support.AbstractBeanFactory.resolveValueIfNecessary(AbstractBeanFactory.java:363)
at org.springframework.beans.factory.support.AbstractBeanFactory.applyPropertyValues(AbstractBeanFactory.java:327)
at org.springframework.beans.factory.support.AbstractBeanFactory.createBean(AbstractBeanFactory.java:303)
at org.springframework.beans.factory.support.AbstractBeanFactory.getSharedInstance(AbstractBeanFactory.java:232)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBeanInternal(AbstractBeanFactory.java:161)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:139)
at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:478)
at org.springframework.context.support.AbstractApplicationContext.preInstantiateSingletons(AbstractApplicationContext.java:308)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:234)
at org.springframework.web.context.support.XmlWebApplicationContext.setServletContext(XmlWebApplicationContext.java:121)
at org.springframework.web.context.ContextLoader.initContext(ContextLoader.java:55)
at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:29)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3270)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:3599)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:821)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:807)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:579)
at org.apache.catalina.core.StandardHostDeployer.install(StandardHostDeployer.java:307)
at org.apache.catalina.core.StandardHost.install(StandardHost.java:772)
at org.apache.catalina.startup.HostConfig.deployWARs(HostConfig.java:492)
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:400)
at org.apache.catalina.startup.HostConfig.start(HostConfig.java:718)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:358)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:166)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1196)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:738)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1188)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:347)
at org.apache.catalina.core.StandardService.start(StandardService.java:497)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:2190)
at org.apache.catalina.startup.Catalina.start(Catalina.java:512)
at org.apache.catalina.startup.Catalina.execute(Catalina.java:400)
at org.apache.catalina.startup.Catalina.process(Catalina.java:180)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)