I am using Portal Express 6.1 ,I have 3 virtual portals , in each I build a site , it is working fine , unless the white page problem , it appears for anonymous or LoggedIn Users , sometimes when you press to go a page , or when you write the url of the virtual Portal in the explorer -v 7.0- , the loading is not complete , so a white page appears , you need to refresh the page to view the site correctly.

I have also a switching between 2 of these sites , virtual Portals , just calling the path - url, they worked fine , but gives a white page first sometimes .

I checked the log file :

[8/3/09 15:03:31:317 GMT+02:00] 0000000a WsServerImpl A WSVR0001I: Server WebSphere_Portal open for e-business
[8/3/09 16:00:40:917 GMT+02:00] 00000041 LdapRegistryI A SECJ0419I: The user registry is currently connected to the LDAP server ldap://172.16.60.77:636.
[8/3/09 16:06:09:596 GMT+02:00] 00000042 CacheServiceI I DYNA1001I: WebSphere Dynamic Cache instance named ws/com.ibm.wps.model.impl.RuntimeClientMap.userAgent2 client initialized successfully.
[8/3/09 16:06:10:612 GMT+02:00] 00000042 SystemOut O STS:skip it [ObjectIDImpl '6_CGAH47L00OE4402B5MR2090GJ7', CONTENT_NODE, VP: -1124, [Domain: rel], DB: 9CFB-0CAA484E05003B428058C56E011280F3]
[8/3/09 16:06:11:940 GMT+02:00] 00000042 ServletWrappe I SRVE0242I: [wps] [/wps] [/themes/html/Internal Portal/Default.jsp]: Initialization successful.
[8/3/09 16:06:12:502 GMT+02:00] 00000042 CacheServiceI I DYNA1001I: WebSphere Dynamic Cache instance named services/cache/cmapi/simple_sdo initialized successfully.
[8/3/09 16:06:14:112 GMT+02:00] 00000042 SystemOut O Unable to load theme configuration /themes/html/Internal+Portal/colors/themeConfig.properties
[8/3/09 16:06:14:112 GMT+02:00] 00000042 ServletWrappe E SRVE0068E: Uncaught exception thrown in one of the service methods of the servlet: /themes/html/Internal Portal/Default.jsp. Exception thrown : java.lang.NullPointerException
at com.ibm._jsp._Default._jspService(_Default.java:84 9)
at com.ibm.ws.jsp.runtime.HttpJspBase.service(HttpJsp Base.java:87)
at javax.servlet.http.HttpServlet.service(HttpServlet .java:856)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.ser vice(ServletWrapper.java:1068)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.ser vice(ServletWrapper.java:1009)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain.d oFilter(WebAppFilterChain.java:118)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain._ doFilter(WebAppFilterChain.java:87)
at com.ibm.ws.webcontainer.filter.WebAppFilterManager .doFilter(WebAppFilterManager.java:771)
at com.ibm.ws.webcontainer.filter.WebAppFilterManager .doFilter(WebAppFilterManager.java:679)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.han dleRequest(ServletWrapper.java:539)
at com.ibm.ws.wswebcontainer.servlet.ServletWrapper.h andleRequest(ServletWrapper.java:478)
at com.ibm.wsspi.webcontainer.servlet.GenericServletW rapper.handleRequest(GenericServletWrapper.java:12 2)
at com.ibm.ws.jsp.webcontainerext.AbstractJSPExtensio nServletWrapper.handleRequest(AbstractJSPExtension ServletWrapper.java:225)
at com.ibm.ws.jsp.webcontainerext.AbstractJSPExtensio nProcessor.handleRequest(AbstractJSPExtensionProce ssor.java:278)
at com.ibm.ws.webcontainer.webapp.WebAppRequestDispat cher.include(WebAppRequestDispatcher.java:639)
at com.ibm.wps.services.dispatcher.DispatcherServiceI mpl.handleRequest(DispatcherServiceImpl.java:93)
at com.ibm.wps.services.dispatcher.DispatcherServiceI mpl.include(DispatcherServiceImpl.java:53)
at com.ibm.wps.services.dispatcher.Dispatcher.include (Dispatcher.java:50)
at com.ibm.wps.engine.templates.themes.Default.doDisp atch(Default.java:283)
at com.ibm.wps.engine.templates.themes.Default.render (Default.java:236)
at com.ibm.wps.engine.templates.ThemeTemplate.render( ThemeTemplate.java:65)
at com.ibm.wps.engine.phases.WPRenderPhase.processRen dering(WPRenderPhase.java:394)
at com.ibm.wps.engine.phases.WPBaseRenderPhase.execut e(WPBaseRenderPhase.java:173)
at com.ibm.wps.state.phases.AbstractRenderPhase.next( AbstractRenderPhase.java:106)
at com.ibm.wps.engine.phases.WPAbstractRenderPhase.ne xt(WPAbstractRenderPhase.java:97)
at com.ibm.wps.engine.Servlet.callPortal(Servlet.java :805)
at com.ibm.wps.engine.Servlet.doGet(Servlet.java:607)
at javax.servlet.http.HttpServlet.service(HttpServlet .java:743)
at com.ibm.wps.engine.Servlet.doFilter(Servlet.java:1 184)
at com.ibm.wps.resolver.servlet.ContentHandlerCleanup .doFilter(ContentHandlerCleanup.java:648)
at com.ibm.wps.resolver.servlet.AbstractFilter.doFilt er(AbstractFilter.java:82)
at com.ibm.wps.engine.Servlet.service(Servlet.java:11 75)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.ser vice(ServletWrapper.java:1068)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.ser vice(ServletWrapper.java:1009)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain.d oFilter(WebAppFilterChain.java:145)
at com.ibm.wps.engine.ExtendedLocaleFilter.doFilter(E xtendedLocaleFilter.java:93)
at com.ibm.ws.webcontainer.filter.FilterInstanceWrapp er.doFilter(FilterInstanceWrapper.java:190)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain.d oFilter(WebAppFilterChain.java:130)
at com.ibm.wps.state.filter.StateCleanup.doFilter(Sta teCleanup.java:89)
at com.ibm.ws.webcontainer.filter.FilterInstanceWrapp er.doFilter(FilterInstanceWrapper.java:190)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain.d oFilter(WebAppFilterChain.java:130)
at com.ibm.wps.resolver.friendly.servlet.FriendlySele ctionFilter.doFilter(FriendlySelectionFilter.java: 189)
at com.ibm.ws.webcontainer.filter.FilterInstanceWrapp er.doFilter(FilterInstanceWrapper.java:190)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain.d oFilter(WebAppFilterChain.java:130)
at com.ibm.wps.engine.VirtualPortalFilter.doFilter(Vi rtualPortalFilter.java:88)
at com.ibm.ws.webcontainer.filter.FilterInstanceWrapp er.doFilter(FilterInstanceWrapper.java:190)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain.d oFilter(WebAppFilterChain.java:130)
at com.ibm.wps.mappingurl.impl.URLAnalyzer.doFilter(U RLAnalyzer.java:282)
at com.ibm.ws.webcontainer.filter.FilterInstanceWrapp er.doFilter(FilterInstanceWrapper.java:190)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain.d oFilter(WebAppFilterChain.java:130)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain._ doFilter(WebAppFilterChain.java:87)
at com.ibm.ws.webcontainer.filter.WebAppFilterManager .doFilter(WebAppFilterManager.java:771)
at com.ibm.ws.webcontainer.filter.WebAppFilterManager .doFilter(WebAppFilterManager.java:679)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.han dleRequest(ServletWrapper.java:539)
at com.ibm.ws.wswebcontainer.servlet.ServletWrapper.h andleRequest(ServletWrapper.java:478)
at com.ibm.ws.webcontainer.webapp.WebApp.handleReques t(WebApp.java:3365)
at com.ibm.ws.webcontainer.webapp.WebGroup.handleRequ est(WebGroup.java:267)
at com.ibm.ws.webcontainer.WebContainer.handleRequest (WebContainer.java:814)
at com.ibm.ws.wswebcontainer.WebContainer.handleReque st(WebContainer.java:1455)
at com.ibm.ws.webcontainer.channel.WCChannelLink.read y(WCChannelLink.java:115)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLi nk.handleDiscrimination(HttpInboundLink.java:454)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLi nk.handleNewInformation(HttpInboundLink.java:383)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLi nk.ready(HttpInboundLink.java:263)
at com.ibm.ws.tcp.channel.impl.NewConnectionInitialRe adCallback.sendToDiscriminators(NewConnectionIniti alReadCallback.java:214)
at com.ibm.ws.tcp.channel.impl.NewConnectionInitialRe adCallback.complete(NewConnectionInitialReadCallba ck.java:113)
at com.ibm.ws.tcp.channel.impl.AioReadCompletionListe ner.futureCompleted(AioReadCompletionListener.java :165)
at com.ibm.io.async.AbstractAsyncFuture.invokeCallbac k(AbstractAsyncFuture.java:217)
at com.ibm.io.async.AsyncChannelFuture.fireCompletion Actions(AsyncChannelFuture.java:161)
at com.ibm.io.async.AsyncFuture.completed(AsyncFuture .java:136)
at com.ibm.io.async.ResultHandler.complete(ResultHand ler.java:195)
at com.ibm.io.async.ResultHandler.runEventProcessingL oop(ResultHandler.java:743)
at com.ibm.io.async.ResultHandler$2.run(ResultHandler .java:873)
at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.j ava:1473)

anyone can help please ?


Regards
Rahma