[hibernate-issues] [Hibernate-JIRA] Issue Comment Edited: (JPA-4) PersistenceUtil.isLoaded() fails with a ClassCastException in Websphere 7

PersistenceUtil.isLoaded() fails with a ClassCastException in Websphere 7 ------------------------------------------------------------------------- Key: JPA-4 URL: https://hibernate.onjira.com/browse/JPA-4 Project: Java Persistence API Issue Type: Bug Affects Versions: 1.0.0 Environment: Websphere 7 Hibernate 3.5 Reporter: Mike Youngstrom To duplicate deploy a .war with hibernate 3.5 to Websphere with the contextlistener below. You need to set the classloader to "parent last" so that your application will use Hibernate's JPA 2 API instead of Webspheres JPA 1 API. package test; import javax.persistence.Persistence; import javax.servlet.ServletContextEvent; import javax.servlet.ServletContextListener; public class TestListener implements ServletContextListener { @Override public void contextDestroyed(ServletContextEvent arg0) { } @Override public void contextInitialized(ServletContextEvent arg0) { System.out.println("Result of isLoaded: "+Persistence.getPersistenceUtil().isLoaded(new Object())); } } Throws the exception below. It appears the problem is that PersistenceProviderResolverHolder.PersistenceProviderResolverPerClassLoader scans all of the classloader levels to find PersistenceProviders. This is finding Websphere's OpenJPA provider in a different classloader than the application and hence with a different JPA API. Although this example happens in Websphere 7 it would in theory also happen anytime Websphere is used in an app server with another JPA implementation that cannot be removed from the server. java.lang.ClassCastException: com.ibm.websphere.persistence.PersistenceProviderImpl incompatible with javax.persistence.spi.PersistenceProvider at javax.persistence.Persistence$1.isLoaded(Persistence.java:92) at test.TestListener.contextInitialized(TestListener.java:20) at com.ibm.ws.webcontainer.webapp.WebApp.notifyServletContextCreated(WebApp.java:1681) at com.ibm.ws.webcontainer.webapp.WebApp.commonInitializationFinish(WebApp.java:374) at com.ibm.ws.webcontainer.webapp.WebAppImpl.initialize(WebAppImpl.java:299) at com.ibm.ws.webcontainer.webapp.WebGroupImpl.addWebApplication(WebGroupImpl.java:100) at com.ibm.ws.webcontainer.VirtualHostImpl.addWebApplication(VirtualHostImpl.java:166) at com.ibm.ws.webcontainer.WSWebContainer.addWebApp(WSWebContainer.java:731) at com.ibm.ws.webcontainer.WSWebContainer.addWebApplication(WSWebContainer.java:616) at com.ibm.ws.webcontainer.component.WebContainerImpl.install(WebContainerImpl.java:376) at com.ibm.ws.webcontainer.component.WebContainerImpl.start(WebContainerImpl.java:668) at com.ibm.ws.runtime.component.ApplicationMgrImpl.start(ApplicationMgrImpl.java:1122) at com.ibm.ws.runtime.component.DeployedApplicationImpl.fireDeployedObjectStart(DeployedApplicationImpl.java:1315) at com.ibm.ws.runtime.component.DeployedModuleImpl.start(DeployedModuleImpl.java:623) at com.ibm.ws.runtime.component.DeployedApplicationImpl.start(DeployedApplicationImpl.java:940) at com.ibm.ws.runtime.component.ApplicationMgrImpl.startApplication(ApplicationMgrImpl.java:725) at com.ibm.ws.runtime.component.ApplicationMgrImpl$1.run(ApplicationMgrImpl.java:1266) at com.ibm.ws.security.auth.ContextManagerImpl.runAs(ContextManagerImpl.java:4509) at com.ibm.ws.security.auth.ContextManagerImpl.runAsSystem(ContextManagerImpl.java:4687) at com.ibm.ws.security.core.SecurityContext.runAsSystem(SecurityContext.java:255) at com.ibm.ws.runtime.component.ApplicationMgrImpl.startApplicationDynamically(ApplicationMgrImpl.java:1271) at com.ibm.ws.runtime.component.ApplicationMgrImpl.start(ApplicationMgrImpl.java:2043) at com.ibm.ws.runtime.component.CompositionUnitMgrImpl.start(CompositionUnitMgrImpl.java:439) at com.ibm.ws.runtime.component.CompositionUnitImpl.start(CompositionUnitImpl.java:123) at com.ibm.ws.runtime.component.CompositionUnitMgrImpl.start(CompositionUnitMgrImpl.java:382) at com.ibm.ws.runtime.component.CompositionUnitMgrImpl.startCompositionUnit(CompositionUnitMgrImpl.java:653) at com.ibm.ws.runtime.component.CompositionUnitMgrImpl.startCompositionUnit(CompositionUnitMgrImpl.java:615) at com.ibm.ws.runtime.component.ApplicationMgrImpl.startApplication(ApplicationMgrImpl.java:1177) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:48) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37) at java.lang.reflect.Method.invoke(Method.java:600) at sun.reflect.misc.Trampoline.invoke(MethodUtil.java:37) at sun.reflect.GeneratedMethodAccessor35.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37) at java.lang.reflect.Method.invoke(Method.java:600) at sun.reflect.misc.MethodUtil.invoke(MethodUtil.java:244) at javax.management.modelmbean.RequiredModelMBean.invokeMethod(RequiredModelMBean.java:1086) at javax.management.modelmbean.RequiredModelMBean.invoke(RequiredModelMBean.java:967) at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:848) at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:773) at com.ibm.ws.management.AdminServiceImpl$1.run(AdminServiceImpl.java:1320) at com.ibm.ws.security.util.AccessController.doPrivileged(AccessController.java:118) at com.ibm.ws.management.AdminServiceImpl.invoke(AdminServiceImpl.java:1213) at com.ibm.ws.management.application.sync.StartDeploymentTask.startDeployment(StartDeploymentTask.java:236) at com.ibm.ws.management.application.sync.StartDeploymentTask.fullAppUpdate(StartDeploymentTask.java:113) at com.ibm.ws.management.application.sync.StartDeploymentTask.performTask(StartDeploymentTask.java:101) at com.ibm.ws.management.application.sync.AppBinaryProcessor$ExpandApp.expand(AppBinaryProcessor.java:1556) at com.ibm.ws.management.application.sync.AppBinaryProcessor.postProcessSynchronousExt(AppBinaryProcessor.java:654) at com.ibm.ws.management.bla.sync.BLABinaryProcessor.postProcess(BLABinaryProcessor.java:569) at com.ibm.ws.management.bla.sync.BLABinaryProcessor.onChangeCompletion(BLABinaryProcessor.java:451) at com.ibm.ws.management.repository.FileRepository.postNotify(FileRepository.java:1915) at com.ibm.ws.management.repository.FileRepository.update(FileRepository.java:1424) at com.ibm.ws.management.repository.client.LocalConfigRepositoryClient.update(LocalConfigRepositoryClient.java:189) at com.ibm.ws.sm.workspace.impl.WorkSpaceMasterRepositoryAdapter.update(WorkSpaceMasterRepositoryAdapter.java:655) at com.ibm.ws.sm.workspace.impl.RepositoryContextImpl.update(RepositoryContextImpl.java:1954) at com.ibm.ws.sm.workspace.impl.RepositoryContextImpl.synch(RepositoryContextImpl.java:1902) at com.ibm.ws.sm.workspace.impl.WorkSpaceImpl.synch(WorkSpaceImpl.java:511) at com.ibm.ws.management.configservice.ConfigServiceImpl.save(ConfigServiceImpl.java:703) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:48) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37) at java.lang.reflect.Method.invoke(Method.java:600) at sun.reflect.misc.Trampoline.invoke(MethodUtil.java:37) at sun.reflect.GeneratedMethodAccessor35.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37) at java.lang.reflect.Method.invoke(Method.java:600) at sun.reflect.misc.MethodUtil.invoke(MethodUtil.java:244) at javax.management.modelmbean.RequiredModelMBean.invokeMethod(RequiredModelMBean.java:1086) at javax.management.modelmbean.RequiredModelMBean.invoke(RequiredModelMBean.java:967) at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:848) at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:773) at com.ibm.ws.management.AdminServiceImpl$1.run(AdminServiceImpl.java:1320) at com.ibm.ws.security.util.AccessController.doPrivileged(AccessController.java:118) at com.ibm.ws.management.AdminServiceImpl.invoke(AdminServiceImpl.java:1213) at com.ibm.ws.management.connector.AdminServiceDelegator.invoke(AdminServiceDelegator.java:181) at com.ibm.ws.management.connector.rmi.RMIConnectorService.invoke(RMIConnectorService.java:282) at com.ibm.ws.management.connector.rmi._RMIConnectorService_Tie.invoke(_RMIConnectorService_Tie.java:395) at com.ibm.ws.management.connector.rmi._RMIConnectorService_Tie._invoke(_RMIConnectorService_Tie.java:160) at com.ibm.CORBA.iiop.ServerDelegate.dispatchInvokeHandler(ServerDelegate.java:622) at com.ibm.CORBA.iiop.ServerDelegate.dispatch(ServerDelegate.java:475) at com.ibm.rmi.iiop.ORB.process(ORB.java:513) at com.ibm.CORBA.iiop.ORB.process(ORB.java:1574) at com.ibm.rmi.iiop.Connection.respondTo(Connection.java:2841) at com.ibm.rmi.iiop.Connection.doWork(Connection.java:2714) at com.ibm.rmi.iiop.WorkUnitImpl.doWork(WorkUnitImpl.java:63) at com.ibm.ejs.oa.pool.PooledThread.run(ThreadPool.java:118) at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1550)