How to Display a Customized Error Message When the Web Server Cannot Communicate with ColdFusion MX
If there's a problem that prevents communication between your webserver and ColdFusion MX, a default error message will be returned to the browser. The TechNote below explains how to use the errorurl setting to display a customized error handler page instead of the default error. (The technique applies to ColdFusion MX Server configuration, or ColdFusion MX for J2EE on JRun.)
How to Display a Customized Error Message When the Web Server Cannot Communicate with ColdFusion MX