运行一个EJB出现下列错误是怎么回事呀？

Question

<2003-5-14 上午10时41分27秒> <Error> <J2EE> <Error deploying application JBuilder_DefaultWebApp: Could not load JBuilder_DefaultWebApp> java.lang.reflect.UndeclaredThrowableException: weblogic.j2ee.DeploymentException: Could not load web application from 'E:\java_code\EJB\Demo1\defaultroot' at weblogic.servlet.internal.WebAppServletContext.getDescriptorLoader(WebAppServletContext.java:941) at weblogic.servlet.internal.WebAppServletContext.<init>(WebAppServletContext.java:805) at weblogic.servlet.internal.HttpServer.loadWebApp(HttpServer.java:413) at weblogic.j2ee.WebAppComponent.deploy(WebAppComponent.java:74) at weblogic.j2ee.Application.addComponent(Application.java:160) at weblogic.j2ee.J2EEService.addDeployment(J2EEService.java:117) at weblogic.management.mbeans.custom.DeploymentTarget.addDeployment(DeploymentTarget.java:329) at weblogic.management.mbeans.custom.DeploymentTarget.addDeployment(DeploymentTarget.java:144) at weblogic.management.mbeans.custom.WebServer.addWebDeployment(WebServer.java:76) at java.lang.reflect.Method.invoke(Native Method) at weblogic.management.internal.DynamicMBeanImpl.invokeLocally(DynamicMBeanImpl.java:606) at weblogic.management.internal.DynamicMBeanImpl.invoke(DynamicMBeanImpl.java:590) at weblogic.management.internal.ConfigurationMBeanImpl.invoke(ConfigurationMBeanImpl.java:350) at com.sun.management.jmx.MBeanServerImpl.invoke(MBeanServerImpl.java:1555) at com.sun.management.jmx.MBeanServerImpl.invoke(MBeanServerImpl.java:1523) at weblogic.management.internal.MBeanProxy.invoke(MBeanProxy.java:444) at weblogic.management.internal.MBeanProxy.invoke(MBeanProxy.java:185) at $Proxy30.addWebDeployment(Unknown Source) at weblogic.management.configuration.WebServerMBean_CachingStub.addWebDeployment(WebServerMBean_CachingStub.java:1093) at weblogic.management.mbeans.custom.DeploymentTarget.addDeployment(DeploymentTarget.java:315) at weblogic.management.mbeans.custom.DeploymentTarget.addDeployments(DeploymentTarget.java:279) at weblogic.management.mbeans.custom.DeploymentTarget.updateServerDeployments(DeploymentTarget.java:233) at weblogic.management.mbeans.custom.DeploymentTarget.updateDeployments(DeploymentTarget.java:193) at java.lang.reflect.Method.invoke(Native Method) at weblogic.management.internal.DynamicMBeanImpl.invokeLocally(DynamicMBeanImpl.java:606) at weblogic.management.internal.DynamicMBeanImpl.invoke(DynamicMBeanImpl.java:590) at weblogic.management.internal.ConfigurationMBeanImpl.invoke(ConfigurationMBeanImpl.java:350) at com.sun.management.jmx.MBeanServerImpl.invoke(MBeanServerImpl.java:1555) at com.sun.management.jmx.MBeanServerImpl.invoke(MBeanServerImpl.java:1523) at weblogic.management.internal.MBeanProxy.invoke(MBeanProxy.java:444) at weblogic.management.internal.MBeanProxy.invoke(MBeanProxy.java:185) at $Proxy29.updateDeployments(Unknown Source) at weblogic.management.configuration.ServerMBean_CachingStub.updateDeployments(ServerMBean_CachingStub.java:2706) at weblogic.management.mbeans.custom.ApplicationManager.startConfigManager(ApplicationManager.java:360) at weblogic.management.mbeans.custom.ApplicationManager.start(ApplicationManager.java:152) at java.lang.reflect.Method.invoke(Native Method) at weblogic.management.internal.DynamicMBeanImpl.invokeLocally(DynamicMBeanImpl.java:606) at weblogic.management.internal.DynamicMBeanImpl.invoke(DynamicMBeanImpl.java:590) at weblogic.management.internal.ConfigurationMBeanImpl.invoke(ConfigurationMBeanImpl.java:350) at com.sun.management.jmx.MBeanServerImpl.invoke(MBeanServerImpl.java:1555) at com.sun.management.jmx.MBeanServerImpl.invoke(MBeanServerImpl.java:1523) at weblogic.management.internal.MBeanProxy.invoke(MBeanProxy.java:444) at weblogic.management.internal.MBeanProxy.invoke(MBeanProxy.java:185) at $Proxy38.start(Unknown Source) at weblogic.management.configuration.ApplicationManagerMBean_CachingStub.start(ApplicationManagerMBean_CachingStub.java:479) at weblogic.management.Admin.startApplicationManager(Admin.java:1138) at weblogic.management.Admin.finish(Admin.java:561) at weblogic.t3.srvr.T3Srvr.start(T3Srvr.java:501) at weblogic.t3.srvr.T3Srvr.run(T3Srvr.java:198) at weblogic.Server.main(Server.java:35)

Answer 1

--------------- nested within: ------------------weblogic.j2ee.DeploymentException: Could not load JBuilder_DefaultWebApp - with nested exception:[weblogic.j2ee.DeploymentException: Could not load web application from 'E:\java_code\EJB\Demo1\defaultroot'] at weblogic.servlet.internal.HttpServer.loadWebApp(HttpServer.java:416) at weblogic.j2ee.WebAppComponent.deploy(WebAppComponent.java:74) at weblogic.j2ee.Application.addComponent(Application.java:160) at weblogic.j2ee.J2EEService.addDeployment(J2EEService.java:117) at weblogic.management.mbeans.custom.DeploymentTarget.addDeployment(DeploymentTarget.java:329) at weblogic.management.mbeans.custom.DeploymentTarget.addDeployment(DeploymentTarget.java:144) at weblogic.management.mbeans.custom.WebServer.addWebDeployment(WebServer.java:76) at java.lang.reflect.Method.invoke(Native Method) at weblogic.management.internal.DynamicMBeanImpl.invokeLocally(DynamicMBeanImpl.java:606) at weblogic.management.internal.DynamicMBeanImpl.invoke(DynamicMBeanImpl.java:590) at weblogic.management.internal.ConfigurationMBeanImpl.invoke(ConfigurationMBeanImpl.java:350) at com.sun.management.jmx.MBeanServerImpl.invoke(MBeanServerImpl.java:1555) at com.sun.management.jmx.MBeanServerImpl.invoke(MBeanServerImpl.java:1523) at weblogic.management.internal.MBeanProxy.invoke(MBeanProxy.java:444) at weblogic.management.internal.MBeanProxy.invoke(MBeanProxy.java:185) at $Proxy30.addWebDeployment(Unknown Source) at weblogic.management.configuration.WebServerMBean_CachingStub.addWebDeployment(WebServerMBean_CachingStub.java:1093) at weblogic.management.mbeans.custom.DeploymentTarget.addDeployment(DeploymentTarget.java:315) at weblogic.management.mbeans.custom.DeploymentTarget.addDeployments(DeploymentTarget.java:279) at weblogic.management.mbeans.custom.DeploymentTarget.updateServerDeployments(DeploymentTarget.java:233) at weblogic.management.mbeans.custom.DeploymentTarget.updateDeployments(DeploymentTarget.java:193) at java.lang.reflect.Method.invoke(Native Method) at weblogic.management.internal.DynamicMBeanImpl.invokeLocally(DynamicMBeanImpl.java:606) at weblogic.management.internal.DynamicMBeanImpl.invoke(DynamicMBeanImpl.java:590) at weblogic.management.internal.ConfigurationMBeanImpl.invoke(ConfigurationMBeanImpl.java:350) at com.sun.management.jmx.MBeanServerImpl.invoke(MBeanServerImpl.java:1555) at com.sun.management.jmx.MBeanServerImpl.invoke(MBeanServerImpl.java:1523) at weblogic.management.internal.MBeanProxy.invoke(MBeanProxy.java:444) at weblogic.management.internal.MBeanProxy.invoke(MBeanProxy.java:185) at $Proxy29.updateDeployments(Unknown Source) at weblogic.management.configuration.ServerMBean_CachingStub.updateDeployments(ServerMBean_CachingStub.java:2706) at weblogic.management.mbeans.custom.ApplicationManager.startConfigManager(ApplicationManager.java:360) at weblogic.management.mbeans.custom.ApplicationManager.start(ApplicationManager.java:152) at java.lang.reflect.Method.invoke(Native Method) at weblogic.management.internal.DynamicMBeanImpl.invokeLocally(DynamicMBeanImpl.java:606) at weblogic.management.internal.DynamicMBeanImpl.invoke(DynamicMBeanImpl.java:590) at weblogic.management.internal.ConfigurationMBeanImpl.invoke(ConfigurationMBeanImpl.java:350) at com.sun.management.jmx.MBeanServerImpl.invoke(MBeanServerImpl.java:1555) at com.sun.management.jmx.MBeanServerImpl.invoke(MBeanServerImpl.java:1523) at weblogic.management.internal.MBeanProxy.invoke(MBeanProxy.java:444) at weblogic.management.internal.MBeanProxy.invoke(MBeanProxy.java:185) at $Proxy38.start(Unknown Source) at weblogic.management.configuration.ApplicationManagerMBean_CachingStub.start(ApplicationManagerMBean_CachingStub.java:479) at weblogic.management.Admin.startApplicationManager(Admin.java:1138) at weblogic.management.Admin.finish(Admin.java:561) at weblogic.t3.srvr.T3Srvr.start(T3Srvr.java:501) at weblogic.t3.srvr.T3Srvr.run(T3Srvr.java:198) at <2003-5-14 上午10时41分27秒> <Notice> <Management> <Application Poller started for development server.> <2003-5-14 上午10时41分27秒> <Notice> <WebLogicServer> <ListenThread listening on port 7003> <2003-5-14 上午10时41分27秒> <Notice> <WebLogicServer> <SSLListenThread listening on port 7004> <2003-5-14 上午10时41分28秒> <Notice> <WebLogicServer> <Started WebLogic Admin Server "myserver" for domain "mydomain" running in Development Mode> <2003-5-14 上午10时41分47秒> <Alert> <WebLogicServer> <The disabling of server logins has been requested by system>