[schleyfox]

You get that message fairly often because the implementation uses continuations (http://en.wikipedia.org/wiki/Continuation). This is one functional style for making a stateless protocol (HTTP) into a stateful one. HN could use a different design (one with less state) and avoid these issues with a few different trade-offs. This is an implementation detail rather than something specific to FP vs. non-FP. Also, best I can tell, HN still stores all of its data in flat files rather than a traditional datastore.