Java Programming

Hi All,

I am using a Struts application wherein i am using a LoginControl class
which is extending ActionServlet such that it act as a controller.

Code for the LoginControl.

public class LoginControl extends  ActionServlet{

	private static final Logger logger = Logger.getLogger(LoginControl.class.getName());


	public void init() {

		try {
			   super.init();
			  // String prefix =  getServletContext().getRealPath("/");

			   String propFile = "myapp.properties";
			   File file = new File(propFile);

			   // if the log4j-init-file is set
			   if(propFile != null) {
				   PropertyConfigurator.configure(file.getAbsolutePath());
				   GlobalValues.configure(file.getAbsolutePath());
				}
		   }
		   catch(Exception e) {
			logger.error("myappApplication has an error", e);


		   }
	}

	protected void process(HttpServletRequest request, HttpServletResponse response)
	throws IOException, ServletException
	{
		System.out.println("1");
		try
		{
			if (sessionValidate(request))
			{
				logger.debug("validation is true");
				System.out.println("inside validation");
				HttpSession session=request.getSession();
				request.setAttribute("interval",new Integer(session.getMaxInactiveInterval()));
				super.process(request ,response);
			}
			else
			{
				logger.debug("validation is false");
				response.sendRedirect(request.getContextPath()+"/jsp/LogOut.jsp");
			}
		}
		catch(Exception e)
		{
			logger.debug("error occurred in LoginControl:",e);
			e.printStackTrace();
		}
	
	private boolean sessionValidate(HttpServletRequest request)
	{
		
			HttpSession session = request.getSession();
			String reqUid=(String)request.getParameter("uid");
			String sessUid=(String)session.getAttribute("uid");
			
			logger.debug("the session id"+sessUid);
			logger.debug("the request id"+reqUid);
			if(null==reqUid && null==sessUid)
			{
				sessUid=(new Guid()).toString();
				session.setAttribute("uid", sessUid);
				request.setAttribute("uid", sessUid);
				return true;
			}
			f(null!=reqUid && null!=sessUid && reqUid.equals(sessUid)&& !("popup").equals(request.getParameter("pFlag"))&&!"false".equals(request.getParameter("vAction")))
			{
				sessUid=(new Guid()).toString();
				session.setAttribute("uid", sessUid);
				request.setAttribute("uid", sessUid);
				
				logger.debug("validation:true");
				return true;
			}
			else
			{
				logger.debug("validation:false");
				return false;
			}
		
	}

while trying to run the application from the login page i am getting the null pointer
excpetiuon at the ActionServlet.process.
and the first two SOP's are printed but the logs are not coming through.

the log

[13/Mar/2008:14:59:48] INFO ( 5424): CORE3282: stdout: inside validation
[13/Mar/2008:14:59:48] WARNING ( 5424): CORE3283: stderr: java.lang.NullPointerException
[13/Mar/2008:14:59:48] WARNING ( 5424): CORE3283: stderr: 	at org.apache.struts.action.ActionServlet.getRequestProcessor(ActionServlet.java:854)
[13/Mar/2008:14:59:48] WARNING ( 5424): CORE3283: stderr: 	at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482)
[13/Mar/2008:14:59:48] WARNING ( 5424): CORE3283: stderr: 	at 
com.myapp.action.LoginControl.process(Unknown Source)
[13/Mar/2008:14:59:48] WARNING ( 5424): CORE3283: stderr: 	at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:525)
[13/Mar/2008:14:59:48] WARNING ( 5424): CORE3283: stderr: 	at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
[13/Mar/2008:14:59:48] WARNING ( 5424): CORE3283: stderr: 	at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
[13/Mar/2008:14:59:48] WARNING ( 5424): CORE3283: stderr: 	at org.apache.catalina.core.StandardWrapperValve.invokeServletService(StandardWrapperValve.java:720)
[13/Mar/2008:14:59:48] WARNING ( 5424): CORE3283: stderr: 	at org.apache.catalina.core.StandardWrapperValve.access$000(StandardWrapperValve.java:118)
[13/Mar/2008:14:59:48] WARNING ( 5424): CORE3283: stderr: 	at org.apache.catalina.core.StandardWrapperValve$1.run(StandardWrapperValve.java:278)
[13/Mar/2008:14:59:48] WARNING ( 5424): CORE3283: stderr: 	at java.security.AccessController.doPrivileged(Native Method)
[13/Mar/2008:14:59:48] WARNING ( 5424): CORE3283: stderr: 	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:274)
[13/Mar/2008:14:59:48] WARNING ( 5424): CORE3283: stderr: 	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:505)
[13/Mar/2008:14:59:48] WARNING ( 5424): CORE3283: stderr: 	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:212)
[13/Mar/2008:14:59:48] WARNING ( 5424): CORE3283: stderr: 	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:505)
[13/Mar/2008:14:59:48] WARNING ( 5424): CORE3283: stderr: 	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:203)
[13/Mar/2008:14:59:48] WARNING ( 5424): CORE3283: stderr: 	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:505)
[13/Mar/2008:14:59:48] WARNING ( 5424): CORE3283: stderr: 	at com.iplanet.ias.web.connector.nsapi.NSAPIProcessor.process(NSAPIProcessor.java:158)
[13/Mar/2008:14:59:48] WARNING ( 5424): CORE3283: stderr: 	at com.iplanet.ias.web.WebContainer.service(WebContainer.java:598)

my real botheration is why the logs are not getting printed.I was able to do so before.

Any pointers would be hugely appreciated.