I do not understand why you do not want to place the host name into /etc/hosts. Without it you will run into other problems later (RMI will not work, for one thing).

I do not know of any configuration setting to bypass the checks, you would have to modify the code. And RMI was just an example, you could very well run into other problems. You also never said why you are against modifying /etc/hosts, it is such a simple solution.