ClassNotFound exception in jbpm + Spring integration

All, I am trying to get Spring + jbpm + JPA + JTA integration on websphere.

I have kept the jbpm.jar in the WEB-INF\lib directory.. still I keep getting this exception trace...

[7/5/11 15:08:57:091 IST] 00000011 webapp E com.ibm.ws.webcontainer.webapp.WebApp notifyServletContextCreated SRVE0283E: Exception caught while initializing context: {0} java.lang.NoClassDefFoundError: org.jbpm.api.ProcessEngine at java.lang.Class.getDeclaredFieldsImpl(Native Method) at java.lang.Class.getDeclaredFields(Class.java:550) at org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor.findPersistenceMetadata(PersistenceAnnotationBeanPostProcessor.java:372) at org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor.postProcessMergedBeanDefinition(PersistenceAnnotationBeanPostProcessor.java:320) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.开发者_运维技巧applyMergedBeanDefinitionPostProcessors(AbstractAutowireCapableBeanFactory.java:798) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:493) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456) at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:291) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:288) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:190) at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:580) at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:895) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:425) at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:276) at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:197) at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:47) at com.ibm.ws.webcontainer.webapp.WebApp.notifyServletContextCreated(WebApp.java:1707) at com.ibm.ws.webcontainer.webapp.WebApp.commonInitializationFinish(WebApp.java:380) 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:1319) at com.ibm.ws.runtime.component.DeployedModuleImpl.start(DeployedModuleImpl.java:610) at com.ibm.ws.runtime.component.DeployedApplicationImpl.start(DeployedApplicationImpl.java:944) 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:4582) at com.ibm.ws.security.auth.ContextManagerImpl.runAsSystem(ContextManagerImpl.java:4760) 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:60) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37) at java.lang.reflect.Method.invoke(Method.java:611) at sun.reflect.misc.Trampoline.invoke(MethodUtil.java:49) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:60) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37) at java.lang.reflect.Method.invoke(Method.java:611) at sun.reflect.misc.MethodUtil.invoke(MethodUtil.java:256) at javax.management.modelmbean.RequiredModelMBean.invokeMethod(RequiredModelMBean.java:1085) at javax.management.modelmbean.RequiredModelMBean.invoke(RequiredModelMBean.java:966) 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$1.run(AdminServiceImpl.java:1332) at com.ibm.ws.security.util.AccessController.doPrivileged(AccessController.java:118) at com.ibm.ws.management.AdminServiceImpl.invoke(AdminServiceImpl.java:1225) at com.ibm.ws.management.connector.AdminServiceDelegator.invoke(AdminServiceDelegator.java:181) at com.ibm.ws.management.connector.rmi.RMIConnectorService.invoke(RMIConnectorService.java:282) at com.ibm.ws.management.connector.rmi._RMIConnectorService_Tie.invoke(_RMIConnectorService_Tie.java:395) at com.ibm.ws.management.connector.rmi._RMIConnectorService_Tie._invoke(_RMIConnectorService_Tie.java:160) at com.ibm.CORBA.iiop.ServerDelegate.dispatchInvokeHandler(ServerDelegate.java:623) at com.ibm.CORBA.iiop.ServerDelegate.dispatch(ServerDelegate.java:476) at com.ibm.rmi.iiop.ORB.process(ORB.java:513) at com.ibm.CORBA.iiop.ORB.process(ORB.java:1574) at com.ibm.rmi.iiop.Connection.respondTo(Connection.java:2845) at com.ibm.rmi.iiop.Connection.doWork(Connection.java:2718) at com.ibm.rmi.iiop.WorkUnitImpl.doWork(WorkUnitImpl.java:63) at com.ibm.ejs.oa.pool.PooledThread.run(ThreadPool.java:118) at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1604) Caused by: java.lang.ClassNotFoundException: org.jbpm.api.ProcessEngine at java.net.URLClassLoader.findClass(URLClassLoader.java:434) at com.ibm.ws.bootstrap.ExtClassLoader.findClass(ExtClassLoader.java:150) at java.lang.ClassLoader.loadClass(ClassLoader.java:653) at com.ibm.ws.bootstrap.ExtClassLoader.loadClass(ExtClassLoader.java:90) at java.lang.ClassLoader.loadClass(ClassLoader.java:619) at com.ibm.ws.classloader.ProtectionClassLoader.loadClass(ProtectionClassLoader.java:62) at com.ibm.ws.classloader.ProtectionClassLoader.loadClass(ProtectionClassLoader.java:58) at com.ibm.ws.classloader.CompoundClassLoader.loadClass(CompoundClassLoader.java:541) at java.lang.ClassLoader.loadClass(ClassLoader.java:619) ... 73 more

is there anything special set-up in spring that needs to be done to find classes in classpath?

Please help.

Spring requires nothing special to be done.

Since this is a web app, it might be that you need a higher-level class loader because that JAR is required by the app server itself.

There's a hierarchy of class loaders in app servers: bootstrap->server->application. When you put a JAR in WEB-INF/lib it's picked up by the application class loader. You might try putting the org.jbpm.api.ProcessEngine JAR in the server /lib and trying it again.