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Problems with redirect after catching Exception (JSF 2)

 
Melanie Kirchner
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Hi all,

I have a problem with the redirect in my custom ExceptionHandler. The ExceptionHandler should handle NullPointerExceptions and perform a redirect if an exception occures. Here is the part of the Handler that is responsible for the redirect:



I have a simple page to test the ExceptionHandler:



And in the getter-Method for firstname I force a NullPointerException:



The redirect to my error page works fine for this little example but when I add considerable more content on the page (like a menu with many entries and icons) the redirect doesn't work because the response is already commited in the exceptionHandler method. I also tried to redirect to the error page via response.sendRedirect() but the same problems occured.

Why is the response already commited? Is there any context-param or anything else to prevent this behavior?

Thanks
 
Consider Paul's rocket mass heater.
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