java.lang.UnsupportedClassVersionError: Bad version number in .class

[springsource_roo]

org.springframework.web.context.ContextLoader - Context initialization failed
org.springframework.beans.factory.BeanCreationExce ption: Error creating bean with name 'transactionManager' defined in file [D:\work\roo5\pizza\target\clas
at org.apache.maven.lifecycle.internal.LifecycleStart er.singleThreadedBuild(LifecycleStarter.java:183)
at org.apache.maven.lifecycle.internal.LifecycleStart er.execute(LifecycleStarter.j ... 52 more
2011-4-12 9:06:24 org.apache.catalina.core.StandardContext listenerStart
Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListe ner
org.springframework.beans.factory.BeanCreationExce ption: Error creating bean with name 'transactionManager' defined in file [D:\work\roo5\pizza\target\clas
at org.springframework.beans.factory.support.BeanDefi nitionValueResolver.resolveReference(BeanDefinitio nValueResolver.java:328)
at org.springframework.beans.factory.support.BeanDefi nitionValueResolver.resolveValueIfNecessary(BeanDe finitionValueResolver.java:106)
at org.springframework.beans.factory.support.Abstract AutowireCapableBeanFactory.applyPropertyValues(Abs tractAutowireCapableBeanFactory.java:1325)
at org.springframework.beans.factory.support.Abstract AutowireCapableBeanFactory.populateBean(AbstractAu towireCapableBeanFactory.java:1086)
at org.springframework.beans.factory.support.Abstract AutowireCapableBeanFactory.doCreateBean(AbstractAu towireCapableBeanFactory.java:517)
at org.springframework.beans.factory.support.Abstract AutowireCapableBeanFactory.createBean(AbstractAuto wireCapableBeanFactory.java:456)
at org.springframework.beans.factory.support.Abstract BeanFactory$1.getObject(AbstractBeanFactory.java:2 91)
at org.springframework.beans.factory.support.DefaultS ingletonBeanRegistry.getSingleton(DefaultSingleton BeanRegistry.java:222)
at org.springframework.beans.factory.support.Abstract BeanFactory.doGetBean(AbstractBeanFactory.java:288 )
at org.springframework.beans.factory.support.Abstract BeanFactory.getBean(AbstractBeanFactory.java:190)
at org.springframework.beans.factory.support.DefaultL istableBeanFactory.preInstantiateSingletons(Defaul tListableBeanFactory.java:580)
at org.springframework.context.support.AbstractApplic ationContext.finishBeanFactoryInitialization(Abstr actApplicationContext.java:895)
at org.springframework.context.support.AbstractApplic ationContext.refresh(AbstractApplicationContext.ja va:425)
at org.springframework.web.context.ContextLoader.crea teWebApplicationContext(ContextLoader.java:276)
at org.springframework.web.context.ContextLoader.init WebApplicationContext(ContextLoader.java:197)
at org.springframework.web.context.ContextLoaderListe ner.contextInitialized(ContextLoaderListener.java: 47)
at org.apache.catalina.core.StandardContext.listenerS tart(StandardContext.java:4135)
at org.apache.catalina.core.StandardContext.start(Sta ndardContext.java:4630)
at org.apache.catalina.core.ContainerBase.start(Conta inerBase.java:1045)
at org.apache.catalina.core.StandardHost.start(Standa rdHost.java:785)
at org.apache.catalina.core.ContainerBase.start(Conta inerBase.java:1045)
at org.apache.catalina.core.StandardEngine.start(Stan dardEngine.java:445)
org.codehaus.plexus.classworlds.launcher.Launcher. main(Launcher.java:352)
Caused by: org.springframework.beans.factory.BeanCreationExce ption: Error creating bean with name 'entityManagerFactory' defined in file [D:\work\roo5\pizz
at org.springframework.beans.factory.support.Abstract AutowireCapableBeanFactory.initializeBean(Abstract AutowireCapableBeanFactory.java:1420)
at java.security.SecureClassLoader.defineClass(Secure ClassLoader.java:124)
at java.net.URLClassLoader.defineClass(URLClassLoader .java:260)
at java.net.URLClassLoader.access$100(URLClassLoader. java:56)
at java.net.URLClassLoader$1.run(URLClassLoader.java: 195)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.j ava:188)
at org.apache.catalina.loader.WebappClassLoader.findC lass(WebappClassLoader.java:1141)
at org.apache.catalina.loader.WebappClassLoader.loadC lass(WebappClassLoader.java:1612)
at org.apache.catalina.loader.WebappClassLoader.loadC lass(WebappClassLoader.java:1491)
at java.lang.ClassLoader.loadClassInternal(ClassLoade r.java:319)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:164)
at org.hibernate.util.ReflectHelper.classForName(Refl ectHelper.java:192)
at org.hibernate.ejb.packaging.NativeScanner.getClass esInJar(NativeScanner.java:136)
at org.hibernate.ejb.Ejb3Configuration.addScannedEntr ies(Ejb3Configuration.java:474)
at org.hibernate.ejb.Ejb3Configuration.scanForClasses (Ejb3Configuration.java:847)
at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3 Configuration.java:590)
at org.hibernate.ejb.HibernatePersistence.createConta inerEntityManagerFactory(HibernatePersistence.java :73)
at org.springframework.orm.jpa.LocalContainerEntityMa nagerFactoryBean.createNativeEntityManagerFactory( LocalContainerEntityManagerFactoryBean.java:
at org.springframework.orm.jpa.AbstractEntityManagerF actoryBean.afterPropertiesSet(AbstractEntityManage rFactoryBean.java:308)
at org.springframework.beans.factory.support.Abstract AutowireCapableBeanFactory.invokeInitMethods(Abstr actAutowireCapableBeanFactory.java:1477)
at org.springframework.beans.factory.support.Abstract AutowireCapableBeanFactory.initializeBean(Abstract AutowireCapableBeanFactory.java:1417)
... 52 more
2011-4-12 9:06:24 org.apache.catalina.core.StandardContext start

[Stefan Schmidt]

This is typically happening if you compile your application with a JDK 6 and then try to run it with JRE 5. Please make sure this is not the case.

Also, if you want help here you need to explain a little bit what you are doing to cause this issue.

[springsource_roo]

yes, I think you are right.

After I changed JDK, this error disappear.