node의 경우 io.socket 을 사용하다보면 나올 수 있는 문제임.
http://stackoverflow.com/questions/5228254/too-many-open-files-using-child-process
http://blog.nerds.kr/post/17098571264/node-js
http://stackoverflow.com/questions/5228254/too-many-open-files-using-child-process
http://blog.nerds.kr/post/17098571264/node-js