title: Error java.lang.NoClassDefFoundError on org.springframework.webflow.util.RandomGuid
body: <p>I am sorry, my question is stupid, but I am not able to answer it, as a java illiterate. I run a tomcat (5) on CentOS5 (for a CAS server), and when I try to open this URL <a href="http://192.168.1.17:8080/cas-server-webapp-3.3.1/login" rel="nofollow noreferrer">http://192.168.1.17:8080/cas-server-webapp-3.3.1/login</a> I get this error : </p>
  
  <p>first error:
  java.lang.NoClassDefFoundError: Could not initialize class <strong>org.springframework.webflow.util.RandomGuid</strong></p>
  
  <p>and root error:
  org.springframework.web.util.NestedServletException: Handler processing failed; nested exception is java.lang.NoClassDefFoundError: Could not initialize class org.springframework.webflow.util.RandomGuid</p>
  
  <p>$CLASSPATH is empty, and it seems to be a problem, but I don't know what to put in it.</p>
  
  <p>EDIT: Jared is right, my hosts files defined 127.0.0.1 as localhost, and now it work very well!</p>