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java.lang.NullPointerException: 	at com.sun.faces.portlet.LifecycleImpl.clearState(LifecycleImpl.java:353)	at com.sun.faces.portlet.LifecycleImpl.restore(LifecycleImpl.java:380)	at com.sun.faces.portlet.LifecycleImpl.render(LifecycleImpl.java:231)	at org.apache.portals.bridges.jsf.FacesPortlet.process(FacesPortlet.java:517)	at org.apache.portals.bridges.jsf.FacesPortlet.doView(FacesPortlet.java:323)	at javax.portlet.GenericPortlet.doDispatch(GenericPortlet.java:247)	at javax.portlet.GenericPortlet.render(GenericPortlet.java:175)	at org.apache.pluto.core.PortletServlet.dispatch(PortletServlet.java:208)	at org.apache.pluto.core.PortletServlet.doGet(PortletServlet.java:139)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:690)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)	at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:691)	at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:594)	at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:505)	at org.apache.pluto.core.DefaultPortletInvokerService.invoke(DefaultPortletInvokerService.java:167)	at org.apache.pluto.core.DefaultPortletInvokerService.render(DefaultPortletInvokerService.java:101)	at org.apache.pluto.core.PortletContainerImpl.doRender(PortletContainerImpl.java:173)	at org.jasig.portal.channels.portlet.SpringPortletChannelImpl.render(SpringPortletChannelImpl.java:480)	at org.jasig.portal.channels.portlet.CSpringPortletAdaptor.renderCharacters(CSpringPortletAdaptor.java:186)	at org.jasig.portal.ChannelRenderer$Worker.execute(ChannelRenderer.java:545)	at org.jasig.portal.utils.threading.BaseTask.run(BaseTask.java:27)	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)	at java.util.concurrent.FutureTask.run(FutureTask.java:138)	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)	at java.lang.Thread.run(Thread.java:619)