A Framework for Automatic Debugging of Functional and Degradation Failures

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A Framework for Automatic Debugging of Functional and Degradation Failures

Software diagnosis is a particularly challenging problem for modern systems, which may consist of dozens, if not hundreds, of components computing on concurrent and potentially distributed platforms, and using infrastructure and services built by many organizations. We propose a framework that generalizes state-of-the-art classical reasoning-based fault diagnosis which tolerates observation uncertainty and addresses degradation of quality of service. Empirical evaluation involving 27 000 highly realistic synthetic scenarios demonstrates an average accuracy improvement of 20% (with 99% statistical significance) which is considerable in the domain of Soft- ware Fault Localization (SFL). We measure the improvement in ac- curacy on well-established SFL performance metrics.

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