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A fault situation occurs in a SOA (Service Oriented Architecture) to a service, needs to be detected to repair it. It is challenging to guarantee the reliability of service composition in a distributed concurrent, dynamic and complex environment. This paper aims to present fault propagation approach of SOA (Service Oriented Architecture) using Petri Nets. The presented approach extends discrete state space techniques to simulate the concurrent and distributed behavior through Petri nets for the SOA systems in the case of faulty situation. Through the performance analysis of our approach, the results demonstrate the feasibility of the approach.