jsf - Not redirecting to error page on exception -

i trying navigate error page if exception occurred. have defined:

<error-page>     <error-code>500</error-code>     <location>/error.jspx</location> </error-page>  

in web.xml. have tried servlet:

<servlet>     <servlet-name>errorhandler</servlet-name>     <servlet-class>web.servlet.errorhandler</servlet-class> </servlet> <servlet-mapping>     <servlet-name>errorhandler</servlet-name>     <url-pattern>/errorhandler</url-pattern> </servlet-mapping> <error-page>     <error-code>500</error-code>     <location>/errorhandler</location> </error-page> 

but neither navigating error.jspx nor errorhandler servlet called.

to test error handling have tried throw new exception("test"); both of constructor of managed bean , actionlistener. printing exception in console redirection not happening.

i have tried with: <exception-type>java.lang.exception</exception-type> instead of <error-code>500</error-code>, no luck. how can invoke servlet or navigate page whenever exception occurred anywhere constructor or action/actionlistener?

i not know if serve you. have handler error defined follows.

in "faces-config.xml"

 <factory>       <exception-handler-factory>          com.mypackage.global.datexceptionhandlerfactory       </exception-handler-factory>   </factory>  

and 2 classes

import javax.faces.context.exceptionhandler; import javax.faces.context.exceptionhandlerfactory;  public class datexceptionhandlerfactory extends exceptionhandlerfactory {        private exceptionhandlerfactory parent;        // injection handles jsf       public datexceptionhandlerfactory(exceptionhandlerfactory parent) {         this.parent = parent;       }        //create own exceptionhandler       @override       public exceptionhandler getexceptionhandler() {         exceptionhandler result =             new datexceptionhandler(parent.getexceptionhandler());         return result;       }     } 

second class

import java.util.iterator; import javax.faces.facesexception; import javax.faces.application.navigationhandler; import javax.faces.context.exceptionhandler; import javax.faces.context.exceptionhandlerwrapper; import javax.faces.context.facescontext; import javax.faces.context.flash; import javax.faces.event.exceptionqueuedevent; import javax.faces.event.exceptionqueuedeventcontext;  import org.apache.commons.logging.log; import org.apache.commons.logging.logfactory;   public class datexceptionhandler extends exceptionhandlerwrapper {        private static log log = logfactory.getlog(datexceptionhandler.class);       private exceptionhandler wrapped;       public  string error = "n";         public string geterror() {         return error;     }      public void seterror(string error) {         this.error = error;     }      public datexceptionhandler(exceptionhandler wrapped) {         this.wrapped = wrapped;       }        @override       public exceptionhandler getwrapped() {         return wrapped;       }        @override       public void handle() throws facesexception {         iterator iterator = getunhandledexceptionqueuedevents().iterator();          while (iterator.hasnext()) {           exceptionqueuedevent event = (exceptionqueuedevent) iterator.next();           exceptionqueuedeventcontext context = (exceptionqueuedeventcontext)event.getsource();            throwable throwable = context.getexception();            facescontext fc = facescontext.getcurrentinstance();            try {               flash flash = fc.getexternalcontext().getflash();                // put exception in flash scope displayed in error                // page if necessary ...               flash.put("errordetails", throwable.getmessage());                system.out.println("the error put in flash: " + throwable.getmessage());                navigationhandler navigationhandler = fc.getapplication().getnavigationhandler();                navigationhandler.handlenavigation(fc, null, "components/errorhandler.xhtml?faces-redirect=true");                fc.renderresponse();           } {               iterator.remove();           }         }          // let parent handle rest         getwrapped().handle();       }     } 

and errorhandler.xhtml show error

<?xml version='1.0' encoding='utf-8' ?> <!doctype html> <html xmlns="http://www.w3.org/1999/xhtml"       xmlns:h="http://java.sun.com/jsf/html">  <h:head>   <link type="text/css" rel="stylesheet" href="#request.contextpath}/css/default.css" />    <title>#{bundle['guessnumber.error_page.title']}</title> </h:head>  <h:body>     <div class="highlighted errormessage">         <h:outputtext escape="false"                        value="#{bundle['guessnumber.error_page.content']}"/>     </div>     <br/><br/>     <div class="errordetails">         error details: <br/>         #{flash.keep.errordetails}     </div> </h:body> </html>