grails AbstractController's public method don't register to sub controller

I had an AbstractController in src/groovy/ssh

public void listAjax(){
   //do sth
}

then create-controller system.User

class UserController extends AbstractController{
}

but when I visit /user/listAjax, got 404 error.

parent's public method can't be auto register to sub controller?

Solution

oh,it's not a bug...

see: