Rails - Jun 2014 - rescue_from method in application controller

What exception cannot be handled with rescue_from method in application 
controller?
e.g
class ApplicationController < ActionController::Base
  rescue_from Exception, with: error_handler
  . . . . . . . . . .
end
 
1). server errors
2). record not found (404)
3). routing errors
4). all of these

 

Thanks in advance

Joon

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