What happens when a single request takes a long time with these non-blocking I/O servers?

Question

With Node.js, or eventlet or any other non-blocking server, what happens when a given request takes long, does it then block all other requests?

Example, a request c

Answer 1

You are exactly correct. Nodejs developers must be aware of that or their applications will be completely non-performant, if long running code is not asynchronous.

Everything that is going to take a 'long time' needs to be done asynchronously.