javax.faces.FacesException: Possible cycle reference

HTTP Status 500 -

type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

javax.servlet.ServletException: javax.servlet.jsp.JspException: javax.faces.FacesException: javax.faces.el.EvaluationException: javax.faces.FacesException: javax.faces.el.EvaluationException: javax.faces.FacesException: javax.faces.el.EvaluationException: javax.faces.FacesException: javax.faces.FacesException: Possible cycle reference to managed bean "userSession"
org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:821)
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:758)
org.apache.jsp.jsf.register_jsp._jspService(register_jsp.java:91)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:324)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
com.sun.faces.context.ExternalContextImpl.dispatch(ExternalContextImpl.java:322)
com.sun.faces.application.ViewHandlerImpl.renderView(ViewHandlerImpl.java:130)
com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:87)
com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:200)
com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:117)
javax.faces.webapp.FacesServlet.service(FacesServlet.java:198)

root cause

javax.faces.el.EvaluationException: javax.faces.FacesException: javax.faces.el.EvaluationException: javax.faces.FacesException: javax.faces.el.EvaluationException: javax.faces.FacesException: javax.faces.el.EvaluationException: javax.faces.FacesException: javax.faces.FacesException: Possible cycle reference to managed bean "userSession"
com.sun.faces.el.ValueBindingImpl.getValue(ValueBindingImpl.java:206)
com.sun.faces.el.ValueBindingImpl.getValue(ValueBindingImpl.java:154)
javax.faces.component.UIOutput.getValue(UIOutput.java:147)
com.sun.faces.renderkit.html_basic.HtmlBasicInputRenderer.getValue(HtmlBasicInputRenderer.java:82)
com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.getCurrentValue(HtmlBasicRenderer.java:191)
com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.encodeEnd(HtmlBasicRenderer.java:169)
javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:720)
javax.faces.webapp.UIComponentTag.encodeEnd(UIComponentTag.java:623)
javax.faces.webapp.UIComponentTag.doEndTag(UIComponentTag.java:546)
com.sun.faces.taglib.html_basic.OutputTextTag.doEndTag(OutputTextTag.java:173)
org.apache.jsp.jsf.register_jsp._jspx_meth_h_outputText_0(register_jsp.java:255)
org.apache.jsp.jsf.register_jsp._jspx_meth_h_form_0(register_jsp.java:147)
org.apache.jsp.jsf.register_jsp._jspx_meth_f_view_0(register_jsp.java:117)
org.apache.jsp.jsf.register_jsp._jspService(register_jsp.java:82)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:324)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
com.sun.faces.context.ExternalContextImpl.dispatch(ExternalContextImpl.java:322)
com.sun.faces.application.ViewHandlerImpl.renderView(ViewHandlerImpl.java:130)
com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:87)
com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:200)
com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:117)
javax.faces.webapp.FacesServlet.service(FacesServlet.java:198)

note The full stack trace of the root cause is available in the Apache Tomcat/5.0.28 logs.
Apache Tomcat/5.0.28