DWR classes doesn't have access to Liferay request and session attributes. i.e. inside dwr classes this won't work PortalUtil.getUser(req) --- return null Also sharing themeDisplay object using post login hook won't work.. since postlogin-hook's session data is not shared with other portlet applications One way to access themeDisplay object inside DWR classes is do this.. Add these lines to doView().. ThemeDisplay themeDisplay = (ThemeDisplay) request.getAttribute(WebKeys.THEME_DISPLAY); request.getPortletSession().setAttribute("themeDisplay", themeDisplay, PortletSession.APPLICATION_SCOPE); and inside DWR class access like this public void test(HttpSession session) { ThemeDisplay themeDisplay = (ThemeDisplay) session.getAttribute("themeDisplay"); logger.trace(" community name :" + themeDisplay.getScopeGroupName()); }