Given an example of calling two web services methods from a session bean, what if an exception is thrown between the calls to two methods? In the case of not calling the web
Web Services-Coordination (WS-C) and Web Services-Transaction (WS-T) specifications developed by Microsoft, BEA Systems and IBM are used in such cases as I know. You can start from reading Web services transactions and A comparison of Web services transaction protocols articles provided by IBM to make it clear.