Has anyone seen this exception. I am running jboss 4.0.4-GA and am using jpa with toplink essentials to read from the database .. Caused by: javax.persistence.PersistenceException: Exception [TOPLINK-28018] (Or acle TopLink Essentials - 2.0 (Build b41-beta2 (03/30/2007))): oracle.toplink.es sentials.exceptions.EntityManagerSetupException Exception Description: predeploy for PersistenceUnit [toplinkLocal] failed. Internal Exception: Exception [TOPLINK-30007] (Oracle TopLink Essentials - 2.0 ( Build b41-beta2 (03/30/2007))): oracle.toplink.essentials.exceptions.Persistence UnitLoadingException Exception Description: An exception was thrown while loading class: <<Class name>> to check whether it implements @Entity, @Embe ddable, or @MappedSuperclass. Internal Exception: java.lang.ClassNotFoundException: <> at oracle.toplink.essentials.internal.ejb.cmp3.EntityManagerSetupImpl.pr edeploy(EntityManagerSetupImpl.java:615) at oracle.toplink.essentials.internal.ejb.cmp3.JavaSECMPInitializer.call Predeploy(JavaSECMPInitializer.java:146) at oracle.toplink.essentials.internal.ejb.cmp3.JavaSECMPInitializer.init PersistenceUnits(JavaSECMPInitializer.java:226) at oracle.toplink.essentials.internal.ejb.cmp3.JavaSECMPInitializer.init ialize(JavaSECMPInitializer.java:242) at oracle.toplink.essentials.internal.ejb.cmp3.JavaSECMPInitializer.init ializeFromMain(JavaSECMPInitializer.java:278) at oracle.toplink.essentials.internal.ejb.cmp3.JavaSECMPInitializer.getJ avaSECMPInitializer(JavaSECMPInitializer.java:81) at oracle.toplink.essentials.ejb.cmp3.EntityManagerFactoryProvider.creat eEntityManagerFactory(EntityManagerFactoryProvider.java:119) at javax.persistence.Persistence.createEntityManagerFactory(Persistence. java:83) at org.springframework.orm.jpa.LocalEntityManagerFactoryBean.createNativ eEntityManagerFactory(LocalEntityManagerFactoryBean.java:91) at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPro pertiesSet(AbstractEntityManagerFactoryBean.java:251) at org.springframework.beans.factory.support.AbstractAutowireCapableBean Factory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1390) at org.springframework.beans.factory.support.AbstractAutowireCapableBean Factory.initializeBean(AbstractAutowireCapableBeanFactory.java:1359) ... 83 more Caused by: Exception [TOPLINK-28018] (Oracle TopLink Essentials - 2.0 (Build b41 -beta2 (03/30/2007))): oracle.toplink.essentials.exceptions.EntityManagerSetupEx ception Exception Description: predeploy for PersistenceUnit [toplinkLocal] failed. Internal Exception: Exception [TOPLINK-30007] (Oracle TopLink Essentials - 2.0 ( Build b41-beta2 (03/30/2007))): oracle.toplink.essentials.exceptions.Persistence UnitLoadingException Exception Description: An exception was thrown while loading class: c<> to check whether it implements @Entity, @Embe ddable, or @MappedSuperclass. Internal Exception: java.lang.ClassNotFoundException: <> at oracle.toplink.essentials.exceptions.EntityManagerSetupException.pred eployFailed(EntityManagerSetupException.java:212) ... 95 more Caused by: Exception [TOPLINK-30007] (Oracle TopLink Essentials - 2.0 (Build b41 -beta2 (03/30/2007))): oracle.toplink.essentials.exceptions.PersistenceUnitLoadi ngException Exception Description: An exception was thrown while loading class: <> to check whether it implements @Entity, @Embe ddable, or @MappedSuperclass. Internal Exception: java.lang.ClassNotFoundException: <> at oracle.toplink.essentials.exceptions.PersistenceUnitLoadingException. exceptionLoadingClassWhileLookingForAnnotations(PersistenceUnitLoadingException. java:145) at oracle.toplink.essentials.ejb.cmp3.persistence.PersistenceUnitProcess or.isEntity(PersistenceUnitProcessor.java:304) at oracle.toplink.essentials.internal.ejb.cmp3.metadata.MetadataProcesso r.buildEntityClassSetFromAnnotations(MetadataProcessor.java:476) at oracle.toplink.essentials.internal.ejb.cmp3.metadata.MetadataProcesso r.buildEntityList(MetadataProcessor.java:447) at oracle.toplink.essentials.ejb.cmp3.persistence.PersistenceUnitProcess or.processORMetadata(PersistenceUnitProcessor.java:346) at oracle.toplink.essentials.internal.ejb.cmp3.EntityManagerSetupImpl.pr edeploy(EntityManagerSetupImpl.java:584) ... 94 more Caused by: java.lang.ClassNotFoundException: <> at java.net.URLClassLoader$1.run(URLClassLoader.java:200) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:188) at oracle.toplink.essentials.internal.ejb.cmp3.JavaSECMPInitializer$Temp EntityLoader.loadClass(JavaSECMPInitializer.java:356) at java.lang.ClassLoader.loadClass(ClassLoader.java:251) at oracle.toplink.essentials.ejb.cmp3.persistence.PersistenceUnitProcess or.isEntity(PersistenceUnitProcessor.java:301) ... 98 more 17:00:43,951 INFO [STDOUT] [TopLink Finer]: 2007.12.31 05:00:43.951--UnitOfWork (30357264)--Thread(Thread[RMI TCP Connection(2)-10.151.220.141,5,RMI Runtime])-- TX beforeCompletion callback, status=STATUS_ACTIVE 17:00:43,951 INFO [STDOUT] [TopLink Finer]: 2007.12.31 05:00:43.951--UnitOfWork (30357264)--Thread(Thread[RMI TCP Connection(2)-10.151.220.141,5,RMI Runtime])-- begin unit of work commit 17:00:43,961 WARN [TxConnectionManager] Prepare called on a local tx. Use of lo cal transactions on a jta transaction with more than one branch may result in in consistent data in some cases of failure. 17:00:43,971 INFO [STDOUT] [TopLink Finer]: 2007.12.31 05:00:43.971--UnitOfWork (30357264)--Thread(Thread[RMI TCP Connection(2)-10.151.220.141,5,RMI Runtime])-- TX afterCompletion callback, status=COMMITTED 17:00:43,971 INFO [STDOUT] [TopLink Finer]: 2007.12.31 05:00:43.971--UnitOfWork (30357264)--Thread(Thread[RMI TCP Connection(2)-10.151.220.141,5,RMI Runtime])-- end unit of work commit 17:00:43,971 INFO [STDOUT] [TopLink Finer]: 2007.12.31 05:00:43.971--UnitOfWork (30357264)--Thread(Thread[RMI TCP Connection(2)-10.151.220.141,5,RMI Runtime])-- release unit of work View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4116213#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...