findandmodify issue

findandmodify_issue.js

var mongodb = require('mongodb'),
	request = true;

var db = new mongodb.Db('test_db', new mongodb.Server("127.0.0.1", 27017, {
	auto_reconnect: true
}), {});

// listen on error
db.on("error", function(err) {
	console.log('open request ', request);
	console.error('db on error');
	console.dir(err);
});

// open connection
db.open(function(err, client) {
	if (err) {
		console.error(err);
	}

	var collection = new mongodb.Collection(client, 'test_collection');

	// define find and modify
	var findAndModifyLoop = function() {
			// mark request = true as sending mongo request
			request = true;

			console.log('findAndModify request (should not be last)');

			collection.findAndModify({
				hello: 'world'
			}, // query
			[
				['_id', 'asc']
			], // sort order
			{
				$set: {
					hi: 'there'
				}
			}, // replacement, replaces only the field "hi"
			{}, // options

			function(err, object) {
				if (err) {
					console.warn('findAndModify response ', err.message); // returns error if no matching object found
				} else {
					console.log('findAndModify response', object);
				}

				// no more out standing request
				request = false;

				// on result does it again
				findAndModifyLoop();
			});
		};

	// start the loop
	findAndModifyLoop();
});

// db.on("close", function(err) {
// 	console.log('open request ', request);
// 	console.error('db on close');
// 	console.dir(err);
// });

Run this js file
While running issue 'net stop mongodb'

I am seeing two results, either case i consider error case
1> It throws an error
2> Its quiting without findAndModify calling callback

OS: windows 7 ultimate, sp1, x64
Mongodb: v 2.0.4, windows x64 version, running as service