No configuration found for the specified action in Struts 2

Question

I have done validation for my login for. It's working fine but after entering correct username and password, no action is performed, and nor opening JSP page after successful login.

Here is my Login form:

         <s:form validate="true"   action="login">
        <br>
         <table class="bg" cellspacing="0">
        <tr class="logindiv">
          <td >
          </td>`enter code here`
         <td>

       Sign In
       </td>
         </tr>

           <tr>
          <td>
          <s:textfield label="Username" name="obj2.user" cssStyle="height:25px;                   width:150px;"></s:textfield>
         </td>
              </tr>



            <tr>
       <td>
       <s:password label="Password" name="obj2.pass"  cssStyle="height:25px;width:150px;"></s:password>
           </td>
            </tr>

                <tr>
                 <td>

             <center>&nbsp;
               <s:submit value="Login" cssClass="login"></s:submit>
              </center>

                  </td>
                 </tr>


            </table>

               </s:form>

struts.xml:

          <?xml version="1.0" encoding="UTF-8"?>
         <!DOCTYPE struts PUBLIC
          "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
            "http://struts.apache.org/dtds/struts-2.0.dtd">



     <struts>

          <constant name="struts.devMode" value="true" />

           <package name="default" namespace="/" extends="struts-default">
       <action name="login" class="IndianUserActionModule.indianAction" method="Login">
          <result name="input">index.jsp</result>
         <result name="success">IndianHome.jsp</result>
         <result name="fail">index.jsp</result>
      </action>

         </package>

        </struts>

Answer 1

In your struts configuration you map the action to a particular namespace of the package config. But in your JSP form you map an action to a default namespace. These are different namespaces and your action config isn't found in the default namespace, so it fails. You should use namespace attribute of your s:form tag to specify a namespace used to map the action. For example

<s:form validate="true" namespace="/"  action="login"> 

There's an example that would let you better understand the namespaces concept.