Node.js connecting again after calling close with MongoDB

Question

Using the official and latest version of the Node.js MongoDB driver 3.2.4 and doing

const MongoClient = require('mongodb').MongoClient;
const client = new MongoClient(url, {
    useNewUrlParser: true,
    connectTimeoutMS: 10000,
    poolSize: 10,
    j: true,
    reconnectInterval: 2000,
    reconnectTries: 150
});
client.connect();

setTimeout(() => {
   client.close();

   setTimeout(() => {
       client.connect();
   }, 1000);
}, 1000);

I would expect this to connect, wait a second, disconnect, wait a second, and then connect again.

However I am getting the error:

the options [servers] is not supported
the options [caseTranslate] is not supported
server instance pool was destroyed

Is it not possible to connect again after calling close?

Answer 1

Your script doesn't wait for mongo to actually connect. You should use the client inside a callback for connect .

Read here about how to connect using this driver Github Docs