Fixing DNS in Node.js

DNS is one of those invisible technologies that you use every day, but which works so well that you can conveniently ignore it. That is until it breaks completely, or slows your application down to a crawl, or you want to resolve something unusual, and then you’re in a world of trouble. Unfortunately, DNS in Node.js isn’t implemented quite as you might have hoped, and includes some gotchas that can create some of these problems for you, when you least expect it.