title: javax.servlet.ServletException: null
body: <p>Recieved the following error whilst testing a small apache strut based web application ive been working on, the crux of the matter is that somehow a null httpservletrequest request parameter was passed to an Actionforward Execute function within an extened Action class??</p>
  
  <p>My knowledge of struts usage is limited so, an explainition of this erranous behaviour is beyond me, any help greatly appreciated. Exception included below..</p>
  
  <pre><code>javax.servlet.ServletException: null
  org.apache.struts.action.RequestProcessor.processException(RequestProcessor.java:535)
  org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:433)
  org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236)    
  
  org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
  org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
  javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
  javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
  
  root cause
  
  java.lang.NumberFormatException: null
  java.lang.Integer.parseInt(Unknown Source)
  java.lang.Integer.parseInt(Unknown Source)
  
  org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431)
  
  org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236)
  org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
  org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
  javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
  javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
  
  
  note The full stack trace of the root cause is available in the Apache
  Tomcat/5.5.4 logs.
  </code></pre>