WARNING: The (sub)resource method contains empty path annotation

The warning means you have a resource method annotated with @Path("https://stackoverflow.com/") or @Path(""). For instance

@Path("test")
public class Test {

    @GET
    @Path("https://stackoverflow.com/")
    public String test(){}
}

Not sure why Jersey would give a warning, maybe just to make sure that’s what you really want. The reason is that a resource method with @Path("https://stackoverflow.com/") is redundant, as it’s already implied if you were just to do

@Path("test")
public class Test {

    @GET
    public String test(){}
}

without the @Path("https://stackoverflow.com/"). It works the same. So if you have these, remove them, and it should take away the warnings.