Why is node.js only processing six requests at a time?

Question

We have a node.js server which implements a REST API as a proxy to a central server which has a slightly different, and unfortunately asymmetric REST API.

Our client

Answer 1

Are you sure it just returns the results to the client? Node processes everything in one thread. So if you do some fancy response parsing or anything else which doesn't yield, then it would block all your requests.