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java.lang.NoSuchMethodError: spring.service.UserServiceImpl.addUser(LspringmodelUser;)V?

@ManagedProperty(value = "#{UserService}")     UserService userService;
Registration Failure, null

Otherwise you have to make sure that your application is configured to proxy classes using cglib (Use of proxies in Spring AOP)

You are programming against implementation classes instead against interfaces and you are using AOP (@Transactional) .. please try to reference other spring beans via their interfaces.