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java.lang.NullPointerException: 	at com.sun.jsftemplating.layout.ViewRootUtil.getLayoutDefinitionKey(ViewRootUtil.java:271)	at com.sun.jsftemplating.layout.LayoutViewHandler.restoreView(LayoutViewHandler.java:611)	at com.sun.faces.lifecycle.RestoreViewPhase.execute(RestoreViewPhase.java:141)	at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:251)	at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:117)	at com.sun.faces.extensions.avatar.lifecycle.PartialTraversalLifecycle.execute(PartialTraversalLifecycle.java:80)	at javax.faces.webapp.FacesServlet.service(FacesServlet.java:244)	at com.sun.enterprise.tools.admingui.servlet.DelayedInitFacesServlet.service(DelayedInitFacesServlet.java:89)	at org.apache.catalina.core.ApplicationFilterChain.servletService(ApplicationFilterChain.java:427)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:333)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214)	at com.sun.webui.jsf.util.UploadFilter.doFilter(UploadFilter.java:240)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:246)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214)	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:313)	at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:287)	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:218)	at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:648)	at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:593)	at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:94)	at com.sun.enterprise.web.PESessionLockingStandardPipeline.invoke(PESessionLockingStandardPipeline.java:98)	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:222)	at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:648)	at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:593)	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:587)	at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:1096)	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:166)	at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:648)	at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:593)	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:587)	at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:1096)	at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:288)	at com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.invokeAdapter(DefaultProcessorTask.java:647)	at com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.doProcess(DefaultProcessorTask.java:579)	at com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.process(DefaultProcessorTask.java:831)	at com.sun.enterprise.web.connector.grizzly.DefaultReadTask.executeProcessorTask(DefaultReadTask.java:341)	at com.sun.enterprise.web.connector.grizzly.DefaultReadTask.doTask(DefaultReadTask.java:263)	at com.sun.enterprise.web.connector.grizzly.DefaultReadTask.doTask(DefaultReadTask.java:214)	at com.sun.enterprise.web.connector.grizzly.TaskBase.run(TaskBase.java:265)	at com.sun.enterprise.web.connector.grizzly.WorkerThreadImpl.run(WorkerThreadImpl.java:116)