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java.lang.NullPointerException: 	at org.apache.catalina.connector.ResponseFacade.getWriter(	at com.sun.faces.extensions.avatar.lifecycle.AsyncResponse$OnOffResponseWrapper$2.(	at com.sun.faces.extensions.avatar.lifecycle.AsyncResponse$OnOffResponseWrapper.getWriter(	at com.sun.faces.application.ViewHandlerImpl.renderView(	at com.sun.faces.lifecycle.RenderResponsePhase.execute(	at com.sun.faces.lifecycle.LifecycleImpl.phase(	at com.sun.faces.lifecycle.LifecycleImpl.render(	at com.sun.faces.extensions.avatar.lifecycle.PartialTraversalLifecycle.render(	at javax.faces.webapp.FacesServlet.service(