SO 5263716

example.js

var http = require('http');

var server = http.createServer(function (req, res) {
	req.connection.unref(); console.log("Got request. Connection unref'ed again");

	res.writeHead(200, {"Content-Type": "text/plain"});

	setTimeout(function () {
		console.log("Handler timeout invoked");
		res.end("Hello", function (err) {;
			console.log("done", err || "");
		});
	}, 5000);
});

server.on("connection", function (socket) {
	socket.unref(); console.log("Socket unref");
	server.close(); console.log("Server closed");
});

server.listen(3000);

A failure looks like:

> node ./testweak.js
Socket unref
Server closed
>

But sometimes it works with

Socket unref
Server closed
Got request. Connection unref'ed again
Handler timeout invoked
done