Use this information to troubleshoot problems that occur when attempting to display a resource in a browser.
If you cannot access the resource directly through the Application Server, Verify that the URL used to access the resource is correct.
If the URL is incorrect and it is created as a link from another JSP file, servlet, or HTML file, try correcting it in the browser URL field and reloading, to confirm that the problem is a malformed URL. Correct the URL in the "from" HTML file, servlet or JSP file.
View the logs of your Application Server to find out why your resource cannot be found or served .
http://hostname/myapp/servlet/com.mycom.welcomeServlet
You can bypass the HTTP server and access a Web resource through the application server. It is not recommended to serve a production Web site in this way, but it provides a good diagnostic tool when it is not clear whether a problem resides in the HTTP server, WebSphere Application Server, or the HTTP plug-in.