MongoServerSelectionError: connect ECONNREFUSED ::1:27017

Question

I have a problem when I try to connect my app with my database with Mongoose. Already tried the following solutions that I found on google:

restarting MongoDB service on windows manually open DB with cmd located on the bin file of MongoDB But I can't solve it. Can anyone help me?

here is my index.js

const { MongoClient } = require('mongodb')
const url = 'mongodb://localhost:27017';
const database = 'e-comm'
const client = new MongoClient(url);

async function getData()
{
    let result = await client.connect();
    let db = result.db(database);
    let collection = db.collection('products');
    let response =  await collection.find({}).toArray();
    console.log(response);
}
getData();

And throw error

C:\Users\HP\new node\node_modules\mongodb\lib\sdam\topology.js:292
                const timeoutError = new error_1.MongoServerSelectionError(`Server selection
 timed out after ${serverSelectionTimeoutMS} ms`, this.description);
                                     ^

MongoServerSelectionError: connect ECONNREFUSED ::1:27017
    at Timeout._onTimeout (C:\Users\HP\new node\node_modules\mongodb\lib\sdam\topology.js:29
2:38)
    at listOnTimeout (node:internal/timers:564:17)
    at process.processTimers (node:internal/timers:507:7) {
  reason: TopologyDescription {
    type: 'Unknown',
    servers: Map(1) {
      'localhost:27017' => ServerDescription {
        address: 'localhost:27017',
        type: 'Unknown',
        hosts: [],
        passives: [],
        arbiters: [],
        tags: {},
        minWireVersion: 0,
        maxWireVersion: 0,
        roundTripTime: -1,
        lastUpdateTime: 32573830,
        lastWriteDate: 0,
        error: MongoNetworkError: connect ECONNREFUSED ::1:27017
            at connectionFailureError (C:\Users\HP\new node\node_modules\mongodb\lib\cmap\co
nnect.js:387:20)
            at Socket.<anonymous> (C:\Users\HP\new node\node_modules\mongodb\lib\cmap\connec
t.js:310:22)
            at Object.onceWrapper (node:events:628:26)
            at Socket.emit (node:events:513:28)
            at emitErrorNT (node:internal/streams/destroy:151:8)
            at emitErrorCloseNT (node:internal/streams/destroy:116:3)
            at process.processTicksAndRejections (node:internal/process/task_queues:82:21) {
          cause: Error: connect ECONNREFUSED ::1:27017
              at TCPConnectWrap.afterConnect [as oncomplete] (node:net:1300:16) {
            errno: -4078,
            code: 'ECONNREFUSED',
            syscall: 'connect',
            address: '::1',
            port: 27017
          },
          [Symbol(errorLabels)]: Set(1) { 'ResetPool' }
        },
        topologyVersion: null,
        setName: null,
        setVersion: null,
        electionId: null,
        logicalSessionTimeoutMinutes: null,
        primary: null,
        me: null,
        '$clusterTime': null
      }
    },
    stale: false,
    compatible: true,
    heartbeatFrequencyMS: 10000,
    localThresholdMS: 15,
    setName: null,
    maxElectionId: null,
    maxSetVersion: null,
    commonWireVersion: 0,
    logicalSessionTimeoutMinutes: null
  },
  code: undefined,
  [Symbol(errorLabels)]: Set(0) {}
}

Node.js v18.12.1

Answer 1

By default mongodb listens only on the IP4 localhost 127.0.0.1.

The error message indicates you are trying to connect to the IP6 localhost ::1

This is likely because you are using the hostname localhost and your local operating system is resolving to the IP6 address ::1

To fix this you need to have mongoose connect to the same address and port that mongod is listening on, so you will need to either:

a) Change the mongod configuration so it listens on ::1 in addition to or instead of 127.0.0.1. See net.ipv6

b) Change the mongoose configuration to use the IP address instead of the hostname: const url = 'mongodb://127.0.0.1:27017';