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A Self-healing infrastructure allows to observe the behavior of a system, determining its health status, and applying measures to restore the correct state of the application. In recent years our work has focused on the design and implementation of Self-healing architectures, which support applications based on Web Services (WS). This paper presents an improved Self-healing architecture, which proposes a distributed control in its components. The results obtained by applying this new Self-healing architecture to a distributed Digital Library application show a trend towards a better availability of resources.