Mongoose autoReconnect option

I had the same question as you, and robertklep’s solution didn’t work for me either. I found when MongoDB service is stopped, an error event is triggered, but the connection.readyState is still 1 (connected). That may be why it didn’t auto reconnect.

This is what I have now:

  var db = mongoose.connection;

  db.on('connecting', function() {
    console.log('connecting to MongoDB...');
  });

  db.on('error', function(error) {
    console.error('Error in MongoDb connection: ' + error);
    mongoose.disconnect();
  });
  db.on('connected', function() {
    console.log('MongoDB connected!');
  });
  db.once('open', function() {
    console.log('MongoDB connection opened!');
  });
  db.on('reconnected', function () {
    console.log('MongoDB reconnected!');
  });
  db.on('disconnected', function() {
    console.log('MongoDB disconnected!');
    mongoose.connect(dbURI, {server:{auto_reconnect:true}});
  });
  mongoose.connect(dbURI, {server:{auto_reconnect:true}});