FAS: Introducing a Service for Avoiding Faults in Composite Services

  • Koray Gülcü
  • Hasan Sözer
  • Barış Aktemur
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 7527)


In service-oriented architectures, composite services depend on a set of partner services to perform the required tasks. These partner services may become unavailable due to system and/or network faults, leading to an increased error rate for the composite service. In this paper, we propose an approach to prevent the occurrence of errors that result from the unavailability of partner services. We introduce an external Web service, FAS (Fault Avoidance Service), to which composite services can register at will. After registration, FAS periodically checks the partner links, detects unavailable partner services, and updates the composite service with available alternatives. Thus, in case of a partner service error, the composite service will have been updated before invoking the partner service. We provide mathematical analysis regarding the error rate and the ratio of false positives with respect to the monitoring frequency of FAS for different partner service availabilities. We also provide empirical results regarding these metrics based on several tests we performed using the Amazon Elastic Compute Cloud.


Service Composition Composite Service Business Process Execution Language Service Broker Alternative Service 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • Koray Gülcü
    • 1
  • Hasan Sözer
    • 2
  • Barış Aktemur
    • 2
  1. 1.Vestel ElectronicsManisaTurkey
  2. 2.Özyeğin UniversityİstanbulTurkey

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