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

exception org.apache.jasper.JasperException: An exception occurred processing JSP page /WEB-INF/view/jsp/protocol/2.0/casServiceValidationSuccess.jsp at line 7

4:               <c:forEach var="auth" items="${assertion.chainedAuthentications}">
5:                       <c:forEach var="attr" items="${auth.principal.attributes}" >
6:                               <c:choose>
7:                               <c:when test="${attr.value.class.simpleName == 'String'}">
8:                                               <cas:attribute name="${fn:escapeXml(attr.key)}" value="${fn:escapeXml(attr.value)}"/>
9:                               </c:when>
10:                              <c:otherwise>


Stacktrace:
 org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:521)
 org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:430)
 org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
 org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
 javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
 org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:238)
 org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:250)
 org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1047)
 org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:817)
 org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:719)
 org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:644)
 org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:549)
 javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
 javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
 org.jasig.cas.web.init.SafeDispatcherServlet.service_aroundBody2(SafeDispatcherServlet.java:115)
 org.jasig.cas.web.init.SafeDispatcherServlet.service_aroundBody3$advice(SafeDispatcherServlet.java:44)
 org.jasig.cas.web.init.SafeDispatcherServlet.service(SafeDispatcherServlet.java:1)
 com.github.inspektr.common.web.ClientInfoThreadLocalFilter.doFilter(ClientInfoThreadLocalFilter.java:46)

root cause
java.lang.NumberFormatException: For input string: "class"
 java.lang.NumberFormatException.forInputString(NumberFormatException.java:48)
 java.lang.Integer.parseInt(Integer.java:449)
 java.lang.Integer.parseInt(Integer.java:499)
 javax.el.ListELResolver.coerce(ListELResolver.java:166)
 javax.el.ListELResolver.getValue(ListELResolver.java:51)
 javax.el.CompositeELResolver.getValue(CompositeELResolver.java:54)
 org.apache.el.parser.AstValue.getValue(AstValue.java:123)
 org.apache.el.parser.AstEqual.getValue(AstEqual.java:37)
 org.apache.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:186)
 org.apache.jasper.runtime.PageContextImpl.proprietaryEvaluate(PageContextImpl.java:938)
 org.apache.jsp.WEB_002dINF.view.jsp.protocol._2_0.casServiceValidationSuccess_jsp._jspx_meth_c_005fwhen_005f0(casServiceValidationSuccess_jsp.java:235)
 org.apache.jsp.WEB_002dINF.view.jsp.protocol._2_0.casServiceValidationSuccess_jsp._jspx_meth_c_005fchoose_005f0(casServiceValidationSuccess_jsp.java:205)
 org.apache.jsp.WEB_002dINF.view.jsp.protocol._2_0.casServiceValidationSuccess_jsp._jspx_meth_c_005fforEach_005f1(casServiceValidationSuccess_jsp.java:169)
 org.apache.jsp.WEB_002dINF.view.jsp.protocol._2_0.casServiceValidationSuccess_jsp._jspx_meth_c_005fforEach_005f0(casServiceValidationSuccess_jsp.java:126)
 org.apache.jsp.WEB_002dINF.view.jsp.protocol._2_0.casServiceValidationSuccess_jsp._jspService(casServiceValidationSuccess_jsp.java:84)
 org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
 javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
 org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:388)
 org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
 org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
 javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
 org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:238)
 org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:250)
 org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1047)
 org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:817)
 org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:719)
 org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:644)
 org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:549)
 javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
 javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
 org.jasig.cas.web.init.SafeDispatcherServlet.service_aroundBody2(SafeDispatcherServlet.java:115)
 org.jasig.cas.web.init.SafeDispatcherServlet.service_aroundBody3$advice(SafeDispatcherServlet.java:44)
 org.jasig.cas.web.init.SafeDispatcherServlet.service(SafeDispatcherServlet.java:1)
 com.github.inspektr.common.web.ClientInfoThreadLocalFilter.doFilter(ClientInfoThreadLocalFilter.java:46)