I have seen this behavior when the jsp page I am forwarding to is not found such as in wrong location, wrong case (Welcome.jsp vs welcome.jsp). But we are using tiles so not sure if it is tiles specific or not.
Hope this helps. >>> [EMAIL PROTECTED] 09/30/03 10:28AM >>> I would want to see your "web.xml", and any information that shows up in the Tomcat console (not log file). > -----Original Message----- > From: Caroline Jen [mailto:[EMAIL PROTECTED] > > I am experimenting a basic application - logon. I got > the first two screens working without problem. > However, the third screen displays a blank page (no > error message). I am having a very difficult time to > figure out the problem; henceforth, seeking help. > Here is the history of my application: > > 1. http://localhost:8080/LogonPractice/index.jsp (no > problem and I clicked on "Sign in") > 2. > http://localhost:8080/LogonPractice/Logon.do;jsessionid=170B50 > E4D8E07EE36290E98342E8BF9C > (no problem and the screen asked for username and > password. I filled out the information and clicked on > "Submit") > 3. http://localhost:8080/LogonPractice/LogonSubmit.do > (displayed a blank page) > > The Tomcat log file shows the following (no error > message at all): > > 2003-09-29 23:29:26 action: Processing a GET for > /Logon > 2003-09-29 23:29:26 action: Looking for Action > instance for class > org.apache.struts.actions.ForwardAction > 2003-09-29 23:29:26 action: Double checking for > Action instance already there > 2003-09-29 23:29:26 action: Creating new Action > instance > 2003-09-29 23:29:35 action: Processing a POST for > /LogonSubmit > 2003-09-29 23:29:35 action: Looking for ActionForm > bean under attribute 'logonForm' > 2003-09-29 23:29:35 action: Creating new ActionForm > instance of class 'org.apache.artimus.logon.LogonForm' > 2003-09-29 23:29:35 action: Storing instance under > attribute 'logonForm' in scope 'request' > 2003-09-29 23:29:35 action: Populating bean > properties from this request > 2003-09-29 23:29:35 action: Validating input form > properties > 2003-09-29 23:29:35 action: No errors detected, > accepting input > 2003-09-29 23:29:35 action: Looking for Action > instance for class > org.apache.artimus.logon.LogonAction > 2003-09-29 23:29:35 action: Double checking for > Action instance already there > 2003-09-29 23:29:35 action: Creating new Action > instance > > in my struts-config.xml, I have: > > <action > path="/LogonSubmit" > > type="org.apache.artimus.logon.LogonAction" > name="logonForm" > scope="request" > validate="true" > input="/signin/Logon.jsp"> > <forward > name="valid" > path="/signin/Welcome.jsp"/> > </action> > > and my LogonAction.java is: > > package org.apache.artimus.logon; > > import java.io.IOException; > import javax.servlet.ServletException; > import javax.servlet.http.HttpServletRequest; > import javax.servlet.http.HttpSession; > import javax.servlet.http.HttpServletResponse; > import org.apache.struts.action.Action; > import org.apache.struts.action.ActionError; > import org.apache.struts.action.ActionErrors; > import org.apache.struts.action.ActionForm; > import org.apache.struts.action.ActionForward; > import org.apache.struts.action.ActionMapping; > import org.apache.struts.action.ActionServlet; > > import org.apache.artimus.lang.Constants; > > public final class LogonAction extends Action { > > public boolean isUserLogon(String username, > String password) throws UserDirectoryException > { > > return > (UserDirectory.getInstance().isValidPassword(username,password)); > // return true; > > } > > > public ActionForward execute(ActionMapping > mapping, > ActionForm form, > HttpServletRequest request, > HttpServletResponse response) > throws IOException, ServletException { > > // Obtain username and password from web tier > String username = ((LogonForm) > form).getUsername(); > String password = ((LogonForm) > form).getPassword(); > > // Validate credentials with business tier > boolean validated = false; > try { > > validated = > isUserLogon(username,password); > } > > catch (UserDirectoryException ude) { > // couldn't connect to user directory > ActionErrors errors = new ActionErrors(); > errors.add(ActionErrors.GLOBAL_ERROR, > new ActionError("error.logon.connect")); > saveErrors(request,errors); > // return to input page > return (new > ActionForward(mapping.getInput())); > } > > if (!validated) { > // credentials don't match > ActionErrors errors = new ActionErrors(); > errors.add(ActionErrors.GLOBAL_ERROR, > new ActionError("error.logon.invalid")); > saveErrors(request,errors); > // return to input page > return (new > ActionForward(mapping.getInput())); > } > > // Save our logged-in user in the session, > // because we use it again later. > HttpSession session = request.getSession(); > session.setAttribute(Constants.USER_KEY, > form); > > // Log this event, if appropriate > if (servlet.getDebug() >= Constants.DEBUG) { > StringBuffer message = > new StringBuffer("LogonAction: User > '"); > message.append(username); > message.append("' logged on in session "); > message.append(session.getId()); > servlet.log(message.toString()); > } > > // Return success > return (mapping.findForward(Constants.VALID)); > > } > > } // End LogonAction > > > The Constants.class is in the > ApplicationRoot/WEB-INF/classes/org/apache/artimus/lang > directory. And I have > public static final String VALID = "valid"; > > My Welcome.jsp in the ApplicationRoot/signin folder > looks like: > > <%@ taglib uri="/tags/struts-bean" prefix="bean" %> > <%@ taglib uri="/tags/struts-html" prefix="html" %> > <%@ taglib uri="/tags/struts-logic" prefix="logic" %> > <HTML> > <HEAD> > <TITLE>Welcome!</TITLE> > <html:base/> > </HEAD> > <BODY> > <logic:present name="user"> > <H3>Welcome <bean:write name="user" > property="username"/>!</H3> > </logic:present> > <logic:notPresent scope="session" name="user"> > <H3>Welcome World!</H3> > </logic:notPresent> > <html:errors/> > <UL> > <LI><html:link forward="logon">Sign > in</html:link></LI> > <logic:present name="user"> > <LI><html:link forward="logoff">Sign > out</html:link></LI> > </logic:present> > </UL> > <IMG src='struts-power.gif' alt='Powered by Struts'> > </BODY> > </HTML> > > > > __________________________________ > Do you Yahoo!? > The New Yahoo! 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