Cutting-edge tools such as FindBUGS and AGITAR explained, the technique of such an integrated environment Jazz.net highlighted, and the all-new demo with ESC / Java and Spec #, Eclipse and Mozilla are included. This comprehensive and pragmatic description debugging written by Andreas Zeller, talented researchers who developed the GNU Data Display Debugger (DDD), a tool that more than 250,000 professionals use to visualize the data structure of the program while they are running. Unlike other books on debugging, text Zeller is a product agnostic, according to all programming languages and skill levels. Why Programs Fail to explain the best practices ranging from systematic tracking error reports, to observe the symptoms, reproduce the error, and fix defects. It includes various tools and techniques of hands-on observation to fully automated diagnosis, and the author also explores innovative techniques to isolate the minimum input to reproduce the error and to track the cause and effect through the program.