Handling critical events
All apps are susceptible to crashes and signal terminations. Production-ready apps are supposed to handle these critical events as gracefully and usefully as possible when they can, rather than crash abruptly.
In this section, we will learn how to handle fatal errors and termination signals from our app.
Closing the server
One of the first things to do in the event of something critical is to close the server to new connections, so that we can perform the necessary housekeeping before finally terminating the process.
When we start the server using
http.createServer(), the method returns an instance of Node's web server object, which has a method called
close() that will stop the server from receiving new requests.
You can ...