Upgrading the project from struts 1 to struts 2 - struts2

Question

I have recently upgraded my code from Struts 1 to Struts 2 and the app is not working after deploying it in my test environment (Linux box). The test env has 3 server instances with different url for each instance. I have deployed my new code(Struts 2) in instance#2 and instance#1 and #3 has old code(Struts 1)
The problem is once i login to the url's of Instance 1 and 3, I am successfully able to login to Instance #2.
But when I login to Instance #2 url directly, struts 2 action is not being invoked and stays in login page itself
web.xml
<!-- Note how the Application Security Team's security filter is listed
FIRST! -->
<filter-name>AppSecSecurityFilter</filter-name>
<filter-class>com.qwest.appsec.TomcatSecurityFilter</filter-class>
<!-- Required. The name for this application -->
<init-param>
<param-name>applicationName</param-name>
<param-value>NATE</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>AppSecSecurityFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<login-config>
<auth-method>FORM</auth-method>
<form-login-config>
<form-login-page>/does_not_exist_jaasinit.html</form-login-page>
<form-error-page>/appsec/access_denied_en.html</form-error-page>
</form-login-config>
</login-config><filter>
<filter-name>struts2</filter-name>
<filter-class>org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping><session-config>
<session-timeout>
30
</session-timeout>
</session-config>
<welcome-file-list>
<welcome-file>login.jsp</welcome-file>
</welcome-file-list>
Struts.xml:
<struts><package name="loginPackage" namespace="/" extends="struts-default">
<action name="nateLoginAction" class="com.wireless.nate.actions.LoginAction">
<result name="success">creditNate.jsp</result>
<result name="error">login.jsp </result>
<result name="input">login.jsp</result>
</action>
</package></struts>
LoginAction.java
public class LoginAction extends ActionSupport implements
ServletRequestAware,ServletResponseAware
{
private static final long serialVersionUID = -3510995405804328464L;
private Logger logger = Logger.getLogger(this.getClass());
HttpServletRequest request;
HttpServletResponse response;
LoginActionForm loginActionForm;
ActionContext context;
ActionSupport actionSupport;
public LoginActionForm getLoginActionForm() {
return loginActionForm;
}
public void setLoginActionForm(LoginActionForm loginActionForm) {
this.loginActionForm = loginActionForm;
}
#Override
public void setServletResponse(HttpServletResponse response) {
this.response=response;
}
#Override
public void setServletRequest(HttpServletRequest request) {
this.request=request;
}
public String execute() throws Exception
{
System.out.println("inside action execute method");
logger.debug("+execute()");
ValueStack stack = context.getValueStack();
Map<String, Object> context = new HashMap<String, Object>();
// Get the html form fields from the cookies
String salesCode = "";
String loginUserId = "";
javax.servlet.http.Cookie[] cookies = request.getCookies();
javax.servlet.http.Cookie thisCookie = null;
if (null != cookies)
{
for (int i = 0; i < cookies.length; i++)
{
thisCookie = cookies[i];
logger.debug("request.getCookies():");
logger.debug(" cookies[" + i + "].getName()=" + cookies[i].getName());
logger.debug(" cookies[" + i + "].getValue()=" + cookies[i].getValue());
if (thisCookie.getName().equals("salesCode"))
{
salesCode = cookies[i].getValue();
}
else if (thisCookie.getName().equals("user"))
{
loginUserId = cookies[i].getValue();
}
}
}
loginActionForm.setSalesCode(salesCode.toUpperCase());
loginActionForm.setUser(loginUserId);
context.put("loginActionForm", loginActionForm);
stack.push(context);
return SUCCESS;
}
public void validate(){
System.out.println("inside action validate method");
context = ActionContext.getContext();
actionSupport=(ActionSupport)context.getActionInvocation().getAction();
if(loginActionForm.getUser() == null || loginActionForm.getUser().length() == 0){
addFieldError("user.required","User name is required");
}
if(loginActionForm.getPassword() == null || loginActionForm.getPassword().length() ==0){
addFieldError("password.required","Password is required");
}
}
}