Why don't I get a recursive infinite loop when throwing an error in the onError function?

In my coldfusion Application.cfc file, I define an onError function. In certain situations, I explicitly throw an exception using a cfthrow tag - e.g. <cfthrow object="#myException#">. My question is, why doesn't this create an infinite loop? O开发者_StackOverflow中文版r at least cause another call to the onError function? (Instead, it just dumps the error to the screen. Which is the functionality I want, actually :) - but I'm still confused about why this happens.)

This is expected and documented behavior:

If an exception occurs while processing the onError method, or if the onError method uses a cfthrow tag, the ColdFusion standard error handling mechanisms handle the exception.