portal环境进不去

今天将portal服务器启动之后，输入url，发现portal根本进不去了
页面输出的是Error 404: Initialization of one or more services failed.
在错误日志中输出如下：
D:IBMWebSpherewp_profilelogsffdcWebSphere_Portal_00000015_09.06.23_09.20.18_0.txt
[09-6-23 9:20:18:156 CST] 00000015 Servlet       E com.ibm.wps.engine.Servlet init EJPFD0016E: 初始化服务失败。
                                 com.ibm.wps.ac.DomainAdministratorNotFoundException: EJPSB0107E: 检索域 Admin 用户/Admin 组 cn=wpsadmins,o=defaultWIMFileBasedRealm 的标识时发生异常。
    at com.ibm.wps.ac.impl.AccessControlDataManagementServiceImpl.convertDNtoObjectID(AccessControlDataManagementServiceImpl.java:987)
    at com.ibm.wps.ac.impl.AccessControlDataManagementServiceImpl.access$000(AccessControlDataManagementServiceImpl.java:74)
    at com.ibm.wps.ac.impl.AccessControlDataManagementServiceImpl$1.run(AccessControlDataManagementServiceImpl.java:890)
    at com.ibm.wps.um.PumaEngineHelper.runUnrestricted(PumaEngineHelper.java:1185)
    at com.ibm.wps.um.PumaEnvironmentImpl.runUnrestricted(PumaEnvironmentImpl.java:141)
    at com.ibm.wps.services.puma.PumaServiceImpl.executeWithoutACChecks(PumaServiceImpl.java:2495)
    at com.ibm.wps.services.puma.Puma.executeWithoutACChecks(Puma.java:989)
    at com.ibm.wps.ac.impl.AccessControlDataManagementServiceImpl.initializeDomainConfig(AccessControlDataManagementServiceImpl.java:897)
    at com.ibm.wps.ac.impl.AccessControlDataManagementServiceImpl.reinit(AccessControlDataManagementServiceImpl.java:804)
    at com.ibm.wps.ac.impl.AccessControlDataManagementServiceImpl.init(AccessControlDataManagementServiceImpl.java:449)
    at com.ibm.wps.services.ServiceManager.createService(ServiceManager.java:391)
    at com.ibm.wps.services.ServiceManager.initInternal(ServiceManager.java:285)
    at com.ibm.wps.services.ServiceManager.init(ServiceManager.java:179)
    at com.ibm.wps.services.ServiceManager.init(ServiceManager.java:114)
    at com.ibm.wps.engine.Servlet.init(Servlet.java:239)
    at com.ibm.ws.webcontainer.servlet.ServletWrapper.init(ServletWrapper.java:192)
    at com.ibm.ws.wswebcontainer.servlet.ServletWrapper.init(ServletWrapper.java:319)
    at com.ibm.ws.webcontainer.servlet.ServletWrapper.initialize(ServletWrapper.java:1221)
    at com.ibm.ws.wswebcontainer.servlet.ServletWrapper.initialize(ServletWrapper.java:152)
    at com.ibm.wsspi.webcontainer.extension.WebExtensionProcessor.createServletWrapper(WebExtensionProcessor.java:99)
    at com.ibm.ws.webcontainer.webapp.WebApp.getServletWrapper(WebApp.java:831)
    at com.ibm.ws.webcontainer.webapp.WebApp.initializeTargetMappings(WebApp.java:486)
    at com.ibm.ws.webcontainer.webapp.WebApp.commonInitializationFinish(WebApp.java:323)
    at com.ibm.ws.wswebcontainer.webapp.WebApp.initialize(WebApp.java:290)
    at com.ibm.ws.wswebcontainer.webapp.WebGroup.addWebApplication(WebGroup.java:92)
    at com.ibm.ws.wswebcontainer.VirtualHost.addWebApplication(VirtualHost.java:157)
    at com.ibm.ws.wswebcontainer.WebContainer.addWebApp(WebContainer.java:665)
    at com.ibm.ws.wswebcontainer.WebContainer.addWebApplication(WebContainer.java:618)
    at com.ibm.ws.webcontainer.component.WebContainerImpl.install(WebContainerImpl.java:335)
    at com.ibm.ws.webcontainer.component.WebContainerImpl.start(WebContainerImpl.java:551)
    at com.ibm.ws.runtime.component.ApplicationMgrImpl.start(ApplicationMgrImpl.java:1303)
    at com.ibm.ws.runtime.component.DeployedApplicationImpl.fireDeployedObjectStart(DeployedApplicationImpl.java:1138)
    at com.ibm.ws.runtime.component.DeployedModuleImpl.start(DeployedModuleImpl.java:569)
    at com.ibm.ws.runtime.component.DeployedApplicationImpl.start(DeployedApplicationImpl.java:817)
    at com.ibm.ws.runtime.component.ApplicationMgrImpl.startApplication(ApplicationMgrImpl.java:949)
    at com.ibm.ws.runtime.component.ApplicationMgrImpl$AppInitializer.run(ApplicationMgrImpl.java:2122)
    at com.ibm.wsspi.runtime.component.WsComponentImpl$_AsynchInitializer.run(WsComponentImpl.java:342)
    at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1473)
Caused by: com.ibm.portal.puma.MemberNotFoundException: EJPSG0002E: 请求的成员不存在。cn=wpsadmins,o=defaultWIMFileBasedRealm
    at com.ibm.wps.services.puma.PumaServiceImpl.findGroupById(PumaServiceImpl.java:404)
    at com.ibm.wps.services.puma.Puma.findGroupById(Puma.java:404)
    at com.ibm.wps.ac.impl.AccessControlDataManagementServiceImpl.convertDNtoObjectID(AccessControlDataManagementServiceImpl.java:967)
    ... 37 more
Caused by: com.ibm.wps.um.exceptions.impl.MemberNotFoundExceptionImpl: com.ibm.websphere.wim.exception.EntityNotFoundException: CWWIM4001E 找不到“cn=wpsadmins,o=defaultWIMFileBasedRealm”实体。
    at com.ibm.wps.um.VMMFilter.rethrowGet(VMMFilter.java:527)
    at com.ibm.wps.um.FilterAdapter.get(FilterAdapter.java:169)
    at com.ibm.wps.um.PumaEngineHelper.reload(PumaEngineHelper.java:782)
    at com.ibm.wps.um.PumaEngineHelper.loadWithBaseAttributes(PumaEngineHelper.java:684)
    at com.ibm.wps.um.PumaLocatorImpl.findGroupByIdentifier(PumaLocatorImpl.java:368)
    at com.ibm.wps.services.puma.PumaServiceImpl$3.run(PumaServiceImpl.java:394)
    at com.ibm.wps.services.puma.PumaServiceImpl$3.run(PumaServiceImpl.java:392)
    at com.ibm.wps.um.PumaEngineHelper.runWithoutPAC(PumaEngineHelper.java:1222)
    at com.ibm.wps.services.puma.PumaServiceImpl.executeWithoutPAC(PumaServiceImpl.java:2508)
    at com.ibm.wps.services.puma.PumaServiceImpl.findGroupById(PumaServiceImpl.java:390)
    ... 39 more
Caused by: com.ibm.websphere.wim.exception.EntityNotFoundException: CWWIM4001E 找不到“cn=wpsadmins,o=defaultWIMFileBasedRealm”实体。
    at com.ibm.ws.wim.adapter.file.was.FileData.getByDN(FileData.java:929)
    at com.ibm.ws.wim.adapter.file.was.FileAdapter.get(FileAdapter.java:798)
    at com.ibm.ws.wim.ProfileManager.getImpl(ProfileManager.java:1465)
    at com.ibm.ws.wim.ProfileManager.genericProfileManagerMethod(ProfileManager.java:283)
    at com.ibm.ws.wim.ProfileManager.get(ProfileManager.java:332)
    at com.ibm.websphere.wim.ServiceProvider.get(ServiceProvider.java:345)
    at com.ibm.websphere.wim.client.LocalServiceProvider.get(LocalServiceProvider.java:364)
    at com.ibm.wps.um.VMMFilter$3.run(VMMFilter.java:172)
    at com.ibm.ws.security.auth.ContextManagerImpl.runAs(ContextManagerImpl.java:4040)
    at com.ibm.ws.security.auth.ContextManagerImpl.runAsSystem(ContextManagerImpl.java:4137)
    at com.ibm.wps.um.VMMFilter.get(VMMFilter.java:183)
    at com.ibm.wps.um.VMMFilter.filter(VMMFilter.java:386)
    at com.ibm.wps.um.PrincipalFilter.filter(PrincipalFilter.java:59)
    at com.ibm.wps.um.RealmFilter.filter(RealmFilter.java:152)
    at com.ibm.wps.um.PrincipalFilterChain.invokeFiltering(PrincipalFilterChain.java:109)
    at com.ibm.wps.um.FilterAdapter.get(FilterAdapter.java:165)
    ... 47 more

哪个好心的人帮忙看看原因，谢谢！