Unable to load a class specified in your ejb-jar.xml: Class bytes found but defineClass()failed

Exception:weblogic.management.ApplicationException: prepare failed for biz Module: biz Error: Exception preparing module: EJBModule(biz,status=NEW) Unable to deploy EJB: C:/bea/user_projects/domains/mydomain/applications/cis-sp/biz from biz: weblogic.ejb20.deployer.DeploymentDescriptorException: Unable to load a class specified in your ejb-jar.xml: Class bytes found but defineClass()failed for: 'com.xx.biz.pmportal.ejb_dao.PMPortalDAOEJB' at weblogic.ejb20.deployer.MBeanDeploymentInfoImpl.initializeBeanInfos(Lweblogic.management.descriptors.toplevel.EJBDescriptorMBean;Lweblogic.utils.classloaders.GenericClassLoader;)V(MBeanDeploymentInfoImpl.java:550) at weblogic.ejb20.deployer.MBeanDeploymentInfoImpl.<init>(Lweblogic.management.descriptors.toplevel.EJBDescriptorMBean;Lweblogic.utils.classloaders.GenericClassLoader;Ljava.lang.String;Ljava.lang.String;Ljava.lang.String;Lweblogic.utils.jars.VirtualJarFile;)V(MBeanDeploymentInfoImpl.java:232) at weblogic.ejb20.deployer.EJBDeployer.prepare(Lweblogic.utils.jars.VirtualJarFile;Ljava.lang.ClassLoader;Lweblogic.management.descriptors.toplevel.EJBDescriptorMBean;Ljavax.naming.Context;Ljava.util.Map;)V(EJBDeployer.java:1324) at weblogic.ejb20.deployer.EJBModule.prepare(Ljava.lang.ClassLoader;)V(EJBModule.java:498) at weblogic.j2ee.J2EEApplicationContainer.prepareModule(Lweblogic.utils.classloaders.GenericClassLoader;Lweblogic.j2ee.J2EEApplicationContainer$Component;Z)V(J2EEApplicationContainer.java:3142) at weblogic.j2ee.J2EEApplicationContainer.prepareModules([Lweblogic.j2ee.J2EEApplicationContainer$Component;Ljava.lang.String;Z)V(J2EEApplicationContainer.java:1583) at weblogic.j2ee.J2EEApplicationContainer.prepare([Lweblogic.j2ee.J2EEApplicationContainer$Component;[Ljava.lang.String;Ljava.lang.String;Ljava.lang.String;)V(J2EEApplicationContainer.java:1227) at weblogic.j2ee.J2EEApplicationContainer.prepare(Ljava.lang.String;[Lweblogic.management.configuration.ComponentMBean;[Ljava.lang.String;)V(J2EEApplicationContainer.java:1070) at weblogic.management.deploy.slave.SlaveDeployer$ComponentActivateTask.prepareContainer()V(SlaveDeployer.java:2513) at weblogic.management.deploy.slave.SlaveDeployer$ActivateTask.createContainer()Z(SlaveDeployer.java:2463) at weblogic.management.deploy.slave.SlaveDeployer$ActivateTask.prepare()V(SlaveDeployer.java:2379) at weblogic.management.deploy.slave.SlaveDeployer.processPrepareTask(Lweblogic.management.deploy.OamVersion;Lweblogic.management.runtime.DeploymentTaskRuntimeMBean;Z)V(SlaveDeployer.java:866) at weblogic.management.deploy.slave.SlaveDeployer.prepareDelta(Lweblogic.management.deploy.OamDelta;Lweblogic.management.deploy.OamVersion;ZLjava.lang.StringBuffer;)Z(SlaveDeployer.java:594) at weblogic.management.deploy.slave.SlaveDeployer.prepareUpdate(Ljava.util.ArrayList;Z)V(SlaveDeployer.java:508) at weblogic.drs.internal.SlaveCallbackHandler$1.execute(Lweblogic.kernel.ExecuteThread;)V(SlaveCallbackHandler.java:25) at weblogic.kernel.ExecuteThread.execute(Lweblogic.kernel.ExecuteRequest;)V(ExecuteThread.java:219) at weblogic.kernel.ExecuteThread.run()V(ExecuteThread.java:178) at java.lang.Thread.startThreadFromVM(Ljava.lang.Thread;)V(Unknown Source)

 

 

The resolution is

1. change the right jdk to recompile all the java files;

2. remove the option "Web project deployment should include" under the web project's "properties/Myeclipse/Web/Deployment" in myeclipse.

    because i have configured the libs into weblogic's path in the MyEclipse.