无法通过NodeJS连接到MongoDB-在副本集中找不到主数据库错误

Question

I am having difficulty connecting to MongoDB via NodeJS. The Mongo setup consists of a shared cluster.

The URL is below:

mongodb://dev.testserver.com:27017,dev.testserver.com:27018,dev.testserver.com:27019/ua?w=0&replicaSet=dev-testserver-com&readPreference=secondary&slaveOk=true

The code that I have is below:

    var MongoClient = require('mongodb').MongoClient;
MongoClient.connect(url, function(err db) {
  if(!err) {
    console.log("We are connected");
  }

  db.close();
});

The error that I keep getting is "MongoError: no primary found in replicaset".

Can someone please help?

Answer 1

Looks like there is a problem in your server(s). You need to get on the server(s) and run rs.status() to find out the state of your replica set, and each server's logs to find out if and why one or more has stopped or become disconnected.