Getting Error: javax.servlet.ServletException: Cannot find ActionMappings o

Question

type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
javax.servlet.ServletException: Cannot find ActionMappings or ActionFormBeans collection
     org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:848)
     org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:781)
     org.apache.jsp.index_jsp._jspService(org.apache.jsp.index_jsp:88)
     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:322)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:291)
     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
root cause
javax.servlet.jsp.JspException: Cannot find ActionMappings or ActionFormBeans collection
     org.apache.struts.taglib.html.FormTag.lookup(FormTag.java:711)
     org.apache.struts.taglib.html.FormTag.doStartTag(FormTag.java:419)
     org.apache.jsp.index_jsp._jspx_meth_html_form_0(org.apache.jsp.index_jsp:139)
     org.apache.jsp.index_jsp._jspx_meth_html_html_0(org.apache.jsp.index_jsp:114)
     org.apache.jsp.index_jsp._jspService(org.apache.jsp.index_jsp:81)
     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:322)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:291)
     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
note The full stack trace of the root cause is available in the Apache Tomcat/5.5.9 logs.
This is my web.xml file
<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE web-app     PUBLIC "-//SUN Microsystem, //"
     "http://java.sun.com/j2ee/dtds/web-app_2.2/dtd">
<web-app>
     <!--Action Servlet Configuration -->
     <servlet>
          <servlet-name>action</servlet-name>
          <servlet-class>org.apache.struts.action.ActionServlet</servlet-class>
          <!-- Resource Bundle base class -->
          <init-param>
               <param-name>application</param-name>
               <param-value>ApplicationResources</param-value>
          </init-param>
          <!-- Context Relative Path to the XML resource containing Struts Configuration -->
          <init-param>
               <param-name>config</param-name>
               <param-value>/WEB-INF/struts-config.xml</param-value>
          </init-param>
          <!-- The Debugging detail level for this servlet, which controls how much information -->
          <init-param>
               <param-name>debug</param-name>
               <param-value>2</param-value>
          </init-param>
          <load-on-startup>2</load-on-startup>
     </servlet>
     <!-- Action Servlet Mapping -->
     <servlet-mapping>
          <servlet-name>action</servlet-name>
          <url-pattern>*.do</url-pattern>
     </servlet-mapping>
     <!-- The welcome File List -->
     <welcome-file-list>
          <welcome-file>index.jsp</welcome-file>
     </welcome-file-list>
     <!-- Application Tag Library Descriptor -->
     <taglib>
          <taglib-uri>/WEB-INF/app.tld</taglib-uri>
          <taglib-location>/WEB-INF/app.tld</taglib-location>
     </taglib>
     <!-- Struts Tag Lib Descriptors -->
     <taglib>
          <taglib-uri>/WEB-INF/struts-bean.tld</taglib-uri>
          <taglib-location>/WEB-INF/struts-bean.tld</taglib-location>
     </taglib>     
     <taglib>
          <taglib-uri>/WEB-INF/struts-html.tld</taglib-uri>
          <taglib-location>/WEB-INF/struts-html.tld</taglib-location>
     </taglib>     
     <taglib>
          <taglib-uri>/WEB-INF/struts-logic.tld</taglib-uri>
          <taglib-location>/WEB-INF/struts-logic.tld</taglib-location>
     </taglib>
</web-app>
==================================================================================================================
This is my Struts-config.xml file
<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE struts-config     PUBLIC "-//SUN Microsystem, //"
     "http://java.sun.com/j2ee/dtds/struts-config_1_0/dtd">
<struts-config>
     <form-beans>
          <!-- Logon Form Bean -->
          <form-bean name="loginForm"     type="LoginForm" />
     </form-beans>
     <global-forwards>
          <forward name="mainmenu"      path="/mainmenu.jsp" />
     </global-forwards>
     <action-mappings>
          <!-- Process a user logon -->
          <action      path="/login"     type="LoginAction"     
                    name="loginForm"     scope="session"          input="/index.jsp">
          </action>
     </action-mappings>
     </struts-config>
==================================================================================================================
This is my LoginForm.java file
package src;
import org.apache.struts.action.ActionForm;
public class LoginForm extends ActionForm {
     private String login;
     private String password;
     public String getLogin() {
          return login;
     public void setLogin(String login) {
          this.login = login;
     public String getPassword() {
          return password;
     public void setPassword(String password) {
          this.password = password;
==================================================================================================================
This is my LoginAction.java file
package src;
import java.io.IOException;
import javax.servlet.*;
import javax.servlet.http.*;
import org.apache.struts.action.*;
import org.apache.struts.action.Action;
public class LoginAction extends Action {
     public ActionForward execute( ActionMapping mapping, ActionForm form,
               HttpServletRequest request, HttpServletResponse response)
               throws IOException, ServletException
          return (mapping.findForward("mainmenu"));
==================================================================================================================
This is my index.jsp file
<%@ page language ="java" %>
<%@ taglib uri ="/WEB-INF/struts-bean.tld" prefix="bean" %>
<%@ taglib uri ="/WEB-INF/struts-html.tld" prefix="html" %>
<%@ taglib uri ="/WEB-INF/struts-logic.tld" prefix="logic" %>
<html:html>
<head>
     <title> My First Struts Application! </title>
</head>
<body>
     <html:form action="/login">
          LOGIN : <html:text property="login" />
          PASSWORD : <html:password property="password" />
          <html:submit> Login </html:submit>
          <html:reset> Reset </html:reset>
     </html:form>
</body>
</html:html>
==================================================================================================================
and finally This is my mainmenu.jsp file
<%@ page language="java" %>
<%@ taglib uri="/WEB-INF/struts-bean.tld"      prefix="bean" %>
<%@ taglib uri="/WEB-INF/struts-html.tld"      prefix="html" %>
<%@ taglib uri="/WEB-INF/struts-logic.tld"      prefix="logic" %>
<html:html>
<head>
     <title>Main Menu</title>
</head>
<body>
     This is the MainMenu !
</body>
</html:html>
==================================================================================================================
Kindly solve my problem........
try to run on your machine...........
I am using Tomcat 5.5.9 and my Project name is MyAppli

Answer 1

Hey guys,
Even I was frustrated for a long time with all the Struts errors for which Google returned loads of results but no particular solutions. All these solutions were all based on hit and trial and only work on some cases. Let me tell you that Struts (and most other frameworks) have a general approach to consume the actual error message and throw an exception which is light years away from the actual cause. So whats' the solution?
Enable logging.... LOG4J to be precise...
...and see that it (log4j) is configured properly. You will see the actual cause there and not on the consoles of your servers (whichever you use).
In my case, it was a host not found exception in the logs because I was sitting behind a firewall and the validator could not locate struts.apache.org
(Wish this thread had some duke dollars)
Regards,
The Correspondent
http://www.araneidae.org