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I have vaddin 7.4.3 in my application and java 1.6 and it is working fine. but when i changed java 1.6 to java 1.8 and prject facets to 1.6 to 1.8. i am getting compilation error ilike. The type javax.servlet.http.HttpSessionBindingListener cannot be resolved.It is indirectly referenced from required .class filesin VaadinSession.setAttribute("TRAILER_OVER_VIEW_DATA",trailerResultData) please privide me solution.