[cas-dev] CAS cannot redirected back to application - urgent help please !!

[Edward Chen]

I installed CAS 3.2.1 in Tomcat and I am working on linking the jsp 
application to CAS. But When I click on the application, it redirected 
to CAS login page. When I input the login, it came up the following 
message. Can you tell me what happened?

Edward


  HTTP Status 500 -

------------------------------------------------------------------------

*type* Exception report

*message*

*description* _The server encountered an internal error () that 
prevented it from fulfilling this request._

*exception*

javax.servlet.ServletException: The CAS server returned no response.
	org.jasig.cas.client.validation.AbstractTicketValidationFilter.doFilter(AbstractTicketValidationFilter.java:152)
	org.jasig.cas.client.authentication.AuthenticationFilter.doFilter(AuthenticationFilter.java:103)

*root cause*

org.jasig.cas.client.validation.TicketValidationException: The CAS server returned no response.
	org.jasig.cas.client.validation.AbstractUrlBasedTicketValidator.validate(AbstractUrlBasedTicketValidator.java:162)
	org.jasig.cas.client.validation.AbstractTicketValidationFilter.doFilter(AbstractTicketValidationFilter.java:129)
	org.jasig.cas.client.authentication.AuthenticationFilter.doFilter(AuthenticationFilter.java:103)

*note* _The full stack trace of the root cause is available in the 
Apache Tomcat/5.5.25 logs._