HTTP Status 500 - type Exception report message description The server encountered an internal error () that prevented it from fulfilling this request. exception org.apache.jasper.JasperException: access denied (javax.security.auth.AuthPermission modifyPrincipals) org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:512) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:377) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264) javax.servlet.http.HttpServlet.service(HttpServlet.java:802) sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) java.lang.reflect.Method.invoke(Method.java:585) org.apache.catalina.security.SecurityUtil$1.run(SecurityUtil.java:243) java.security.AccessController.doPrivileged(Native Method) javax.security.auth.Subject.doAsPrivileged(Subject.java:517) org.apache.catalina.security.SecurityUtil.execute(SecurityUtil.java:275) org.apache.catalina.security.SecurityUtil.doAsPrivilege(SecurityUtil.java:161) java.security.AccessController.doPrivileged(Native Method) com.ecyrd.jspwiki.ui.WikiServletFilter.doFilter(WikiServletFilter.java:99) com.ecyrd.jspwiki.ui.WikiJSPFilter.doFilter(WikiJSPFilter.java:71) sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) java.lang.reflect.Method.invoke(Method.java:585) org.apache.catalina.security.SecurityUtil$1.run(SecurityUtil.java:243) java.security.AccessController.doPrivileged(Native Method) javax.security.auth.Subject.doAsPrivileged(Subject.java:517) org.apache.catalina.security.SecurityUtil.execute(SecurityUtil.java:275) org.apache.catalina.security.SecurityUtil.doAsPrivilege(SecurityUtil.java:217) root cause org.apache.jasper.JasperException: access denied (javax.security.auth.AuthPermission modifyPrincipals) org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:512) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:395) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264) javax.servlet.http.HttpServlet.service(HttpServlet.java:802) sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) java.lang.reflect.Method.invoke(Method.java:585) org.apache.catalina.security.SecurityUtil$1.run(SecurityUtil.java:243) java.security.AccessController.doPrivileged(Native Method) javax.security.auth.Subject.doAsPrivileged(Subject.java:517) org.apache.catalina.security.SecurityUtil.execute(SecurityUtil.java:275) org.apache.catalina.security.SecurityUtil.doAsPrivilege(SecurityUtil.java:161) java.security.AccessController.doPrivileged(Native Method) java.security.AccessController.doPrivileged(Native Method) org.apache.jasper.runtime.PageContextImpl.doForward(PageContextImpl.java:688) org.apache.jasper.runtime.PageContextImpl.access$1000(PageContextImpl.java:65) org.apache.jasper.runtime.PageContextImpl$11.run(PageContextImpl.java:645) java.security.AccessController.doPrivileged(Native Method) org.apache.jasper.runtime.PageContextImpl.forward(PageContextImpl.java:643) org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:803) org.apache.jasper.runtime.PageContextImpl.access$1100(PageContextImpl.java:65) org.apache.jasper.runtime.PageContextImpl$12.run(PageContextImpl.java:763) java.security.AccessController.doPrivileged(Native Method) org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:761) org.apache.jsp.Wiki_jsp._jspService(Wiki_jsp.java:117) org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97) javax.servlet.http.HttpServlet.service(HttpServlet.java:802) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:334) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264) javax.servlet.http.HttpServlet.service(HttpServlet.java:802) sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) java.lang.reflect.Method.invoke(Method.java:585) org.apache.catalina.security.SecurityUtil$1.run(SecurityUtil.java:243) java.security.AccessController.doPrivileged(Native Method) javax.security.auth.Subject.doAsPrivileged(Subject.java:517) org.apache.catalina.security.SecurityUtil.execute(SecurityUtil.java:275) org.apache.catalina.security.SecurityUtil.doAsPrivilege(SecurityUtil.java:161) java.security.AccessController.doPrivileged(Native Method) com.ecyrd.jspwiki.ui.WikiServletFilter.doFilter(WikiServletFilter.java:99) com.ecyrd.jspwiki.ui.WikiJSPFilter.doFilter(WikiJSPFilter.java:71) sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) java.lang.reflect.Method.invoke(Method.java:585) org.apache.catalina.security.SecurityUtil$1.run(SecurityUtil.java:243) java.security.AccessController.doPrivileged(Native Method) javax.security.auth.Subject.doAsPrivileged(Subject.java:517) org.apache.catalina.security.SecurityUtil.execute(SecurityUtil.java:275) org.apache.catalina.security.SecurityUtil.doAsPrivilege(SecurityUtil.java:217) root cause java.security.AccessControlException: access denied (javax.security.auth.AuthPermission modifyPrincipals) java.security.AccessControlContext.checkPermission(AccessControlContext.java:264) java.security.AccessController.checkPermission(AccessController.java:427) java.lang.SecurityManager.checkPermission(SecurityManager.java:532) javax.security.auth.Subject$SecureSet.add(Subject.java:1057) java.util.Collections$SynchronizedCollection.add(Collections.java:1581) com.ecyrd.jspwiki.WikiSession.invalidate(WikiSession.java:551) com.ecyrd.jspwiki.WikiSession.guestSession(WikiSession.java:872) com.ecyrd.jspwiki.auth.SessionMonitor.find(SessionMonitor.java:142) com.ecyrd.jspwiki.WikiSession.getWikiSession(WikiSession.java:851) com.ecyrd.jspwiki.WikiContext.(WikiContext.java:211) com.ecyrd.jspwiki.WikiEngine.createContext(WikiEngine.java:1922) org.apache.jsp.Error_jsp._jspService(Error_jsp.java:73) org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97) javax.servlet.http.HttpServlet.service(HttpServlet.java:802) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:334) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264) javax.servlet.http.HttpServlet.service(HttpServlet.java:802) sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) java.lang.reflect.Method.invoke(Method.java:585) org.apache.catalina.security.SecurityUtil$1.run(SecurityUtil.java:243) java.security.AccessController.doPrivileged(Native Method) javax.security.auth.Subject.doAsPrivileged(Subject.java:517) org.apache.catalina.security.SecurityUtil.execute(SecurityUtil.java:275) org.apache.catalina.security.SecurityUtil.doAsPrivilege(SecurityUtil.java:161) java.security.AccessController.doPrivileged(Native Method) java.security.AccessController.doPrivileged(Native Method) org.apache.jasper.runtime.PageContextImpl.doForward(PageContextImpl.java:688) org.apache.jasper.runtime.PageContextImpl.access$1000(PageContextImpl.java:65) org.apache.jasper.runtime.PageContextImpl$11.run(PageContextImpl.java:645) java.security.AccessController.doPrivileged(Native Method) org.apache.jasper.runtime.PageContextImpl.forward(PageContextImpl.java:643) org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:803) org.apache.jasper.runtime.PageContextImpl.access$1100(PageContextImpl.java:65) org.apache.jasper.runtime.PageContextImpl$12.run(PageContextImpl.java:763) java.security.AccessController.doPrivileged(Native Method) org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:761) org.apache.jsp.Wiki_jsp._jspService(Wiki_jsp.java:117) org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97) javax.servlet.http.HttpServlet.service(HttpServlet.java:802) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:334) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264) javax.servlet.http.HttpServlet.service(HttpServlet.java:802) sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) java.lang.reflect.Method.invoke(Method.java:585) org.apache.catalina.security.SecurityUtil$1.run(SecurityUtil.java:243) java.security.AccessController.doPrivileged(Native Method) javax.security.auth.Subject.doAsPrivileged(Subject.java:517) org.apache.catalina.security.SecurityUtil.execute(SecurityUtil.java:275) org.apache.catalina.security.SecurityUtil.doAsPrivilege(SecurityUtil.java:161) java.security.AccessController.doPrivileged(Native Method) com.ecyrd.jspwiki.ui.WikiServletFilter.doFilter(WikiServletFilter.java:99) com.ecyrd.jspwiki.ui.WikiJSPFilter.doFilter(WikiJSPFilter.java:71) sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) java.lang.reflect.Method.invoke(Method.java:585) org.apache.catalina.security.SecurityUtil$1.run(SecurityUtil.java:243) java.security.AccessController.doPrivileged(Native Method) javax.security.auth.Subject.doAsPrivileged(Subject.java:517) org.apache.catalina.security.SecurityUtil.execute(SecurityUtil.java:275) org.apache.catalina.security.SecurityUtil.doAsPrivilege(SecurityUtil.java:217) note The full stack trace of the root cause is available in the Apache Tomcat/5.5.20 logs.