java.lang.NumberFormatException: For input string: ""

java.lang.NumberFormatException: For input string: ""	at java.lang.NumberFormatException.forInputString(NumberFormatException.java:48)	at java.lang.Long.parseLong(Long.java:424)	at java.lang.Long.valueOf(Long.java:518)	at com.icesoft.faces.renderkit.dom_html_basic.MenuRenderer.isConversionMatched(MenuRenderer.java:660)	at com.icesoft.faces.renderkit.dom_html_basic.MenuRenderer.isSelected(MenuRenderer.java:471)	at com.icesoft.faces.renderkit.dom_html_basic.MenuRenderer.isValueSelected(MenuRenderer.java:326)	at com.icesoft.faces.renderkit.dom_html_basic.MenuRenderer.renderOption(MenuRenderer.java:307)	at com.icesoft.faces.renderkit.dom_html_basic.MenuRenderer.renderOptions(MenuRenderer.java:448)	at com.icesoft.faces.renderkit.dom_html_basic.MenuRenderer.renderSelect(MenuRenderer.java:380)	at com.icesoft.faces.renderkit.dom_html_basic.MenuRenderer.encodeEnd(MenuRenderer.java:111)	at com.icesoft.faces.component.ext.renderkit.MenuRenderer.encodeEnd(MenuRenderer.java:51)	at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:836)	at com.icesoft.faces.renderkit.dom_html_basic.DomBasicRenderer.encodeParentAndChildren(DomBasicRenderer.java:362)	at com.icesoft.faces.renderkit.dom_html_basic.GridRenderer.encodeChildren(GridRenderer.java:203)	at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:812)	at com.icesoft.faces.renderkit.dom_html_basic.DomBasicRenderer.encodeParentAndChildren(DomBasicRenderer.java:352)	at com.icesoft.faces.component.panelcollapsible.PanelCollapsibleRenderer.encodeChildren(PanelCollapsibleRenderer.java:95)	at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:812)	at javax.faces.component.UIComponent.encodeAll(UIComponent.java:886)	at com.sun.facelets.component.RepeatRenderer.encodeChildren(RepeatRenderer.java:50)	at com.sun.facelets.component.UIRepeat.process(UIRepeat.java:357)	at com.sun.facelets.component.UIRepeat.encodeChildren(UIRepeat.java:617)	at com.icesoft.faces.application.D2DViewHandler.renderResponse(D2DViewHandler.java:542)	at com.icesoft.faces.application.D2DViewHandler.renderResponse(D2DViewHandler.java:546)	at com.icesoft.faces.application.D2DViewHandler.renderResponse(D2DViewHandler.java:546)	at com.icesoft.faces.application.D2DViewHandler.renderResponse(D2DViewHandler.java:546)	at com.icesoft.faces.facelets.D2DFaceletViewHandler.renderResponse(D2DFaceletViewHandler.java:282)	at com.icesoft.faces.application.D2DViewHandler.renderView(D2DViewHandler.java:161)	at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:106)	at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:251)	at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:144)	at com.icesoft.faces.webapp.http.core.JsfLifecycleExecutor.apply(JsfLifecycleExecutor.java:18)	at com.icesoft.faces.webapp.http.core.PageServer$1.respond(PageServer.java:25)	at com.icesoft.faces.webapp.http.servlet.ServletRequestResponse.respondWith(ServletRequestResponse.java:161)	at com.icesoft.faces.webapp.http.servlet.ThreadBlockingAdaptingServlet$ThreadBlockingRequestResponse.respondWith(ThreadBlockingAdaptingServlet.java:36)	at com.icesoft.faces.webapp.http.core.PageServer.service(PageServer.java:30)	at com.icesoft.faces.webapp.http.core.MultiViewServer.service(MultiViewServer.java:56)	at com.icesoft.faces.webapp.http.common.standard.PathDispatcherServer$Matcher.serviceOnMatch(PathDispatcherServer.java:50)	at com.icesoft.faces.webapp.http.common.standard.PathDispatcherServer.service(PathDispatcherServer.java:19)	at com.icesoft.faces.webapp.http.servlet.ThreadBlockingAdaptingServlet.service(ThreadBlockingAdaptingServlet.java:19)	at com.icesoft.faces.webapp.http.servlet.EnvironmentAdaptingServlet.service(EnvironmentAdaptingServlet.java:29)	at com.icesoft.faces.webapp.http.servlet.MainSessionBoundServlet.service(MainSessionBoundServlet.java:106)	at com.icesoft.faces.webapp.http.servlet.SessionDispatcher.service(SessionDispatcher.java:35)	at com.icesoft.faces.webapp.http.servlet.PathDispatcher$Matcher.serviceOnMatch(PathDispatcher.java:52)	at com.icesoft.faces.webapp.http.servlet.PathDispatcher.service(PathDispatcher.java:29)	at com.icesoft.faces.webapp.http.servlet.MainServlet.service(MainServlet.java:79)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:847)	at org.apache.catalina.core.ApplicationFilterChain.servletService(ApplicationFilterChain.java:427)	at org.apache.catalina.core.ApplicationDispatcher.doInvoke(ApplicationDispatcher.java:875)	at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:723)	at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:679)	at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:594)	at com.sun.portal.portletcontainer.portlet.impl.PortletRequestDispatcherImpl.dispatch(PortletRequestDispatcherImpl.java:250)	at com.sun.portal.portletcontainer.portlet.impl.PortletRequestDispatcherImpl.include(PortletRequestDispatcherImpl.java:161)	at com.icesoft.faces.webapp.http.portlet.MainPortlet.doInclude(MainPortlet.java:122)	at com.icesoft.faces.webapp.http.portlet.MainPortlet.doView(MainPortlet.java:55)	at javax.portlet.GenericPortlet.doDispatch(GenericPortlet.java:328)	at javax.portlet.GenericPortlet.render(GenericPortlet.java:233)	at com.sun.portal.portletcontainer.appengine.PortletAppEngineServlet.service(PortletAppEngineServlet.java:392)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:847)	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.portal.portletcontainer.appengine.PortletAppEngineFilter.doFilter(PortletAppEngineFilter.java:105)	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.ApplicationDispatcher.doInvoke(ApplicationDispatcher.java:873)	at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:723)	at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:679)	at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:594)	at com.sun.portal.portletcontainer.impl.PortletContainer.invokePAE(PortletContainer.java:819)	at com.sun.portal.portletcontainer.impl.PortletContainer.invokePAE(PortletContainer.java:694)	at com.sun.portal.portletcontainer.impl.PortletContainer.getMarkup(PortletContainer.java:208)	at com.liferay.portal.portletcontainer.WindowInvoker.invokeRender(WindowInvoker.java:374)	at com.liferay.portlet.InvokerPortletImpl.render(InvokerPortletImpl.java:417)	at org.apache.jsp.html.portal.render_005fportlet_jsp._jspService(render_005fportlet_jsp.java:1392)	at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:109)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:847)	at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:389)	at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:486)	at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:380)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:847)	at org.apache.catalina.core.ApplicationFilterChain.servletService(ApplicationFilterChain.java:427)	at org.apache.catalina.core.ApplicationDispatcher.doInvoke(ApplicationDispatcher.java:875)	at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:723)	at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:679)	at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:594)