Services are performing an increasingly important role in modern application development and composite application The Service-Oriented Architecture (SOA) refers to a style of distributed application. The business applications and data are decomposed into discrete components, known as services, that have particular relevance for various business processes.. The objective of study to create new composite applications that model new or more complex business processes and also to examine the key issues of the user's negative attitude towards introduction of SOA design. Most of the composite applications needed to be reliable and available, however it may appear more difficult to achieved, due to the multi-layered architecture of SOA. To reduce the risk, to reduce the fear of complexity, usable by all types of users when introducing SOA architecture, it is necessary to use error handling methods in order to increase system fault tolerance.