I am working on one enterprise application, in which I am using GWT, Struts2, Hibernate. Now I am integrating EJB session beans in business layer. I need to call session beans from GWT servlet. When I do JNDI lookup, I am getting AccessControlException. I spent quite a lot time in resolving this issue. From eclipse, I unchecked "Use google app engine" from Project Explorer->Properties->Google->App Engine. After doing this everything works fine. My question is what is consequence of disabling Google app engine? Right now, I had prepared on hello world application for testing Gwt-EJB integration. Can there be any other issues if I don't use Google App Engine?