aix下面weblogic部署出现这个问题，咋回事啊？帮帮忙。
环境是：aix weblogic10.3.1
2011-08-10 10:13:43 [org.springframework.web.context.ContextLoader]-[INFO] Root WebApplicationContext: initialization completed in 330556 ms 2011-08-10 10:13:45 [org.apache.commons.digester.Digester]-[ERROR] Digester.getParser: java.lang.UnsupportedOperationException at javax.xml.parsers.SAXParserFactory.setXIncludeAware(Unknown Source) at org.apache.commons.digester.Digester.getFactory(Digester.java:539) at org.apache.commons.digester.Digester.getParser(Digester.java:791) at org.apache.commons.digester.Digester.getXMLReader(Digester.java:1068) at org.apache.commons.digester.Digester.parse(Digester.java:1916) at org.apache.struts.action.ActionServlet.initServlet(ActionServlet.java:1144) at org.apache.struts.action.ActionServlet.init(ActionServlet.java:328) at javax.servlet.GenericServlet.init(GenericServlet.java:241) at com.byttersoft.framework.web.servelet.BtActionServlet.init(Unknown Source) at weblogic.servlet.internal.StubSecurityHelper$ServletInitAction.run(StubSecurityHelper.java:283) at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321) at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:121) at weblogic.servlet.internal.StubSecurityHelper.createServlet(StubSecurityHelper.java:64) at weblogic.servlet.internal.StubLifecycleHelper.createOneInstance(StubLifecycleHelper.java:58) at weblogic.servlet.internal.StubLifecycleHelper.<init>(StubLifecycleHelper.java:48) at weblogic.servlet.internal.ServletStubImpl.prepareServlet(ServletStubImpl.java:521) at weblogic.servlet.internal.WebAppServletContext.preloadServlet(WebAppServletContext.java:1913) at weblogic.servlet.internal.WebAppServletContext.loadServletsOnStartup(WebAppServletContext.java:1887) at weblogic.servlet.internal.WebAppServletContext.preloadResources(WebAppServletContext.java:1805) at weblogic.servlet.internal.WebAppServletContext.start(WebAppServletContext.java:3041) at weblogic.servlet.internal.WebAppModule.startContexts(WebAppModule.java:1374) at weblogic.servlet.internal.WebAppModule.start(WebAppModule.java:452) at weblogic.application.internal.flow.ModuleStateDriver$3.next(ModuleStateDriver.java:204) at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:37) at weblogic.application.internal.flow.ModuleStateDriver.start(ModuleStateDriver.java:60) at weblogic.application.internal.flow.ScopedModuleDriver.start(ScopedModuleDriver.java:200) at weblogic.application.internal.flow.ModuleListenerInvoker.start(ModuleListenerInvoker.java:117) at weblogic.application.internal.flow.ModuleStateDriver$3.next(ModuleStateDriver.java:204) at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:37) at weblogic.application.internal.flow.ModuleStateDriver.start(ModuleStateDriver.java:60) at weblogic.application.internal.flow.StartModulesFlow.activate(StartModulesFlow.java:27) at weblogic.application.internal.BaseDeployment$2.next(BaseDeployment.java:629) at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:37) at weblogic.application.internal.BaseDeployment.activate(BaseDeployment.java:206) at weblogic.application.internal.SingleModuleDeployment.activate(SingleModuleDeployment.java:40) at weblogic.application.internal.DeploymentStateChecker.activate(DeploymentStateChecker.java:161) at weblogic.deploy.internal.targetserver.AppContainerInvoker.activate(AppContainerInvoker.java:79) at weblogic.deploy.internal.targetserver.BasicDeployment.activate(BasicDeployment.java:184) at weblogic.deploy.internal.targetserver.BasicDeployment.activateFromServerLifecycle(BasicDeployment.java:361) at weblogic.management.deploy.internal.DeploymentAdapter$1.doActivate(DeploymentAdapter.java:51) at weblogic.management.deploy.internal.DeploymentAdapter.activate(DeploymentAdapter.java:196) at weblogic.management.deploy.internal.AppTransition$2.transitionApp(AppTransition.java:30) at weblogic.management.deploy.internal.ConfiguredDeployments.transitionApps(ConfiguredDeployments.java:233) at weblogic.management.deploy.internal.ConfiguredDeployments.activate(ConfiguredDeployments.java:169) at weblogic.management.deploy.internal.ConfiguredDeployments.deploy(ConfiguredDeployments.java:123) at weblogic.management.deploy.internal.DeploymentServerService.resume(DeploymentServerService.java:173) at weblogic.management.deploy.internal.DeploymentServerService.start(DeploymentServerService.java:89) at weblogic.t3.srvr.SubsystemRequest.run(SubsystemRequest.java:64) at weblogic.work.ExecuteThread.execute(ExecuteThread.java:201) at weblogic.work.ExecuteThread.run(ExecuteThread.java:173) 2011-08-10 10:13:45 [org.apache.struts.action.ActionServlet]-[ERROR] Unable to initialize Struts ActionServlet due to an unexpected exception or error thrown, so marking the servlet as unavailable. Most likely, this is due to an incorrect or missing library dependency. java.lang.NullPointerException at org.apache.commons.digester.Digester.getXMLReader(Digester.java:1068) at org.apache.commons.digester.Digester.parse(Digester.java:1916) at org.apache.struts.action.ActionServlet.initServlet(ActionServlet.java:1144) at org.apache.struts.action.ActionServlet.init(ActionServlet.java:328) at javax.servlet.GenericServlet.init(GenericServlet.java:241) at com.byttersoft.framework.web.servelet.BtActionServlet.init(Unknown Source) at weblogic.servlet.internal.StubSecurityHelper$ServletInitAction.run(StubSecurityHelper.java:283) at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321) at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:121) at weblogic.servlet.internal.StubSecurityHelper.createServlet(StubSecurityHelper.java:64) at weblogic.servlet.internal.StubLifecycleHelper.createOneInstance(StubLifecycleHelper.java:58) at weblogic.servlet.internal.StubLifecycleHelper.<init>(StubLifecycleHelper.java:48) at weblogic.servlet.internal.ServletStubImpl.prepareServlet(ServletStubImpl.java:521) at weblogic.servlet.internal.WebAppServletContext.preloadServlet(WebAppServletContext.java:1913) at weblogic.servlet.internal.WebAppServletContext.loadServletsOnStartup(WebAppServletContext.java:1887) at weblogic.servlet.internal.WebAppServletContext.preloadResources(WebAppServletContext.java:1805) at weblogic.servlet.internal.WebAppServletContext.start(WebAppServletContext.java:3041) at weblogic.servlet.internal.WebAppModule.startContexts(WebAppModule.java:1374) at weblogic.servlet.internal.WebAppModule.start(WebAppModule.java:452) at weblogic.application.internal.flow.ModuleStateDriver$3.next(ModuleStateDriver.java:204) at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:37) at weblogic.application.internal.flow.ModuleStateDriver.start(ModuleStateDriver.java:60) at weblogic.application.internal.flow.ScopedModuleDriver.start(ScopedModuleDriver.java:200) at weblogic.application.internal.flow.ModuleListenerInvoker.start(ModuleListenerInvoker.java:117) at weblogic.application.internal.flow.ModuleStateDriver$3.next(ModuleStateDriver.java:204) at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:37) at weblogic.application.internal.flow.ModuleStateDriver.start(ModuleStateDriver.java:60) at weblogic.application.internal.flow.StartModulesFlow.activate(StartModulesFlow.java:27) at weblogic.application.internal.BaseDeployment$2.next(BaseDeployment.java:629) at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:37) at weblogic.application.internal.BaseDeployment.activate(BaseDeployment.java:206) at weblogic.application.internal.SingleModuleDeployment.activate(SingleModuleDeployment.java:40) at weblogic.application.internal.DeploymentStateChecker.activate(DeploymentStateChecker.java:161) at weblogic.deploy.internal.targetserver.AppContainerInvoker.activate(AppContainerInvoker.java:79) at weblogic.deploy.internal.targetserver.BasicDeployment.activate(BasicDeployment.java:184) at weblogic.deploy.internal.targetserver.BasicDeployment.activateFromServerLifecycle(BasicDeployment.java:361) at weblogic.management.deploy.internal.DeploymentAdapter$1.doActivate(DeploymentAdapter.java:51) at weblogic.management.deploy.internal.DeploymentAdapter.activate(DeploymentAdapter.java:196) at weblogic.management.deploy.internal.AppTransition$2.transitionApp(AppTransition.java:30) at weblogic.management.deploy.internal.ConfiguredDeployments.transitionApps(ConfiguredDeployments.java:233) at weblogic.management.deploy.internal.ConfiguredDeployments.activate(ConfiguredDeployments.java:169) at weblogic.management.deploy.internal.ConfiguredDeployments.deploy(ConfiguredDeployments.java:123) at weblogic.management.deploy.internal.DeploymentServerService.resume(DeploymentServerService.java:173) at weblogic.management.deploy.internal.DeploymentServerService.start(DeploymentServerService.java:89) at weblogic.t3.srvr.SubsystemRequest.run(SubsystemRequest.java:64) at weblogic.work.ExecuteThread.execute(ExecuteThread.java:201) at weblogic.work.ExecuteThread.run(ExecuteThread.java:173)