I have a MongoDB cluster with replica enabled, my MONGO_URL
looks like the following:
mongodb://algohub:<password>@algohub-shard-00-00-vwc3c.mongodb.net:27017,algohub-shard-00-01-vwc3c.mongodb.net:27017,algohub-shard-00-02-vwc3c.mongodb.net:27017/<dbname>?ssl=true&replicaSet=AlgoHub-shard-0&authSource=admin
It seems Meteor 1.4 can not recognize this URL, thus it always launches a local MongoDB.