"failed to connect to server" even after mongodb is back up

[SamDecrock]

When I start my node.js app WITHOUT MongoDB up and do a db.find I get

failed to connect to server [localhost:27017] on first connect [MongoError: connect ECONNREFUSED 127.0.0.1:27017]

I then try the db.find every 2 seconds, but even when I start up my MongoDB afterwards, I still get

failed to connect to server [localhost:27017] on first connect [MongoError: connect ECONNREFUSED 127.0.0.1:27017]

When I restart my node.js script all works perfect.

I want this to work as there might be a case when MongoDB is not up when I start my Node.js app. Eg when using Docker compose.

[SamDecrock]

Ok. I fixed my problem by reinitializing the mongojs object when connection fails:

var db = null;

function connectToMongoDb(callback) {
	db = mongojs(mongojsConnectionString); // key to success!

	db.on('error', (err) => {});

	db.users.find({}, (err) => {
		if(err) {
			console.log('Error connecting to db:', err.message);

			setTimeout(() => {
				connectToMongoDb(callback);
			}, 2000);
		}else{
			callback();
		}
	});
}

connectToMongoDb(() => {
	console.log('Connected! Whoohoo!');
});