HttpRequest login method and Push

Vaadin 6 / 7 / 8
1

Hi all!

Latest Vaadin framework. I have application which use HttpRequest
login
metod.

[code]
@Theme(“mytheme”)
@Widgetset(“org.mycompany.logintest.MyAppWidgetset”)
@CDIUI(“”)
@PreserveOnRefresh
public class MyUI extends UI {

@Override
protected void init(VaadinRequest vaadinRequest) {
    try {
        VaadinServletService.getCurrentServletRequest().login("user", "password");
        }  catch (ServletException ex) {
            logger.info(MessageFormat.format("Login failed for user {0}", "user"));
    }
}

}
[/code]All work fine. But if i add
@Push
 annotation to my main class
login
method stop work.
Just nothing happens
!
Bug or feature?

Thanks.