Using a language without exception handling is like driving a car with no brakes and no seatbelt | things work ne until something goes wrong. You also learn to drive rather carefully. This paper describes an exception handling extension to the Haskell lazy functional language. The implementation turned out to be very easy but we had problems nding a viable semantics for our system. The resultin...

Statistical Exception Detection System (SEDS) has been successfully used for more than six years to automatically produce web-based exception reports against the performance data warehouse for a large, multi-platform environment. Adding some application specific metrics including middleware traffic and response times made SEDS an excellent tool for application performance management. This paper...