Detection and Diagnosis of Recurrent Faults in Software Systems by Invariant Analysis
A correctly functioning enterprise-software system exhibits long-term, stable correlations between many of its monitoring metrics. Some of these correlations no longer hold when there is an error in the system, potentially enabling error detection and fault diagnosis. However, existing approaches are inefficient, requiring a large number of metrics to be monitored and ignoring the relative discriminative properties of different metric correlations. In enterprise-software systems, similar faults tend to reoccur. It is therefore possible to significantly improve existing correlation-analysis approaches by learning the effects of common recurrent faults on correlations. We present methods to determine the most significant correlations to track for efficient error detection, and the correlations that contribute the most to diagnosis accuracy. We apply machine learning to identify the relevant correlations, removing the need for manually configured correlation thresholds, as used in the prior approaches. We validate our work on a multi-tier enterprise-software system. We are able to detect and correctly diagnose 8 of 10 injected faults to within three possible causes, and to within two in 7 out of 8 cases. This compares favourably with the existing approaches whose diagnosis accuracy is 3 out of 10 to within 3 possible causes. We achieve a precision of at least 95%.
system invariants metric correlations neural network error detection fault diagnosis
Miao Jiang Mohammad A.Munawar Thomas Reidemeister Paul A.S.Ward
Shoshin Distributed Systems Group Department of Electrical and Computer Engineering University of Waterloo, Waterloo, Ontario N2L 3G1
国际会议
11th IEEE High Assurance Systems Engineering Symposium(HASE 2008)(第十一届IEEE高可信系统工程国际研讨会)
南京
英文
323-332
2008-12-03（万方平台首次上网日期，不代表论文的发表时间）