Question 266342 in Mongodb Question posted in
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nodejs giving error while connecting to the mongodb server

while interacting with mongodb in python language it working without any error but in nodejs it is showing me an error everytime can anyone please tell that how can i fix this error.

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this is the source code of the program:


import { MongoClient } from "mongodb";
import assert from 'assert';

const url='mongodb://localhost:27017';

const dbname='myProject';

const client =new MongoClient(url);

client.connect((err)=>{
  assert.equal(null,err);
  console.log("connected sucessfully");

  const db=client.db(dbname);

  client.close();
});

here is the error:


const timeoutError = new error_1.MongoServerSelectionError(`Server selection timed out after ${serverSelectionTimeoutMS} ms`, this.description);
                                     ^

MongoServerSelectionError: connect ECONNREFUSED ::1:27017
    at Timeout._onTimeout (C:Usershasanmongnode_modulesmongodblibsdamtopology.js:278:38)
    at listOnTimeout (node:internal/timers:569:17)
    at process.processTimers (node:internal/timers:512:7) {
  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: 1070637,
        lastWriteDate: 0,
        error: MongoNetworkError: connect ECONNREFUSED ::1:27017
            at connectionFailureError (C:Usershasanmongnode_modulesmongodblibcmapconnect.js:379:20)
            at Socket.<anonymous> (C:Usershasanmongnode_modulesmongodblibcmapconnect.js:285:22)
            at Object.onceWrapper (node:events:632:26)
            at Socket.emit (node:events:517:28)
            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) {
          [Symbol(errorLabels)]: Set(1) { 'ResetPool' },
          [cause]: Error: connect ECONNREFUSED ::1:27017
              at TCPConnectWrap.afterConnect [as oncomplete] (node:net:1555:16) {
            errno: -4078,
            code: 'ECONNREFUSED',
            syscall: 'connect',
            address: '::1',
            port: 27017
          }
        },
        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) {},
  [cause]: MongoNetworkError: connect ECONNREFUSED ::1:27017
      at connectionFailureError (C:Usershasanmongnode_modulesmongodblibcmapconnect.js:379:20)
      at Socket.<anonymous> (C:Usershasanmongnode_modulesmongodblibcmapconnect.js:285:22)
      at Object.onceWrapper (node:events:632:26)
      at Socket.emit (node:events:517:28)
      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) {
    [Symbol(errorLabels)]: Set(1) { 'ResetPool' },
    [cause]: Error: connect ECONNREFUSED ::1:27017
        at TCPConnectWrap.afterConnect [as oncomplete] (node:net:1555:16) {
      errno: -4078,
      code: 'ECONNREFUSED',
      syscall: 'connect',
      address: '::1',
      port: 27017
    }
  }
}

solution for this error

Tags:

2

Answers


  1. 0

    The error you’re encountering is ECONNREFUSED, which indicates that the connection attempt was refused by the server. This is usually an issue with the server rather than the client, but since you’re able to connect using a Python client, it seems like the issue is with your Node.js client.

    Here are some potential reasons why this might be happening:

    1. Different Connection Parameters: The Node.js and Python clients may be using different connection parameters. Make sure that both clients are connecting to the same MongoDB server and port. Check the connection string you’re using in both clients to ensure they’re identical.

    2. Different MongoDB Drivers: The Node.js and Python clients use different MongoDB drivers. There may be differences between these drivers that are causing the issue. Ensure you’re using the latest versions of both drivers.

    3. Connection Pooling: The Node.js MongoDB driver uses connection pooling, which means it maintains a pool of connections to the MongoDB server. If there’s an issue with connection pooling, it could cause the ECONNREFUSED error. Try disabling connection pooling to see if that resolves the issue.

    4. Connection Options: The Node.js MongoDB driver supports a variety of connection options that can affect how it connects to the MongoDB server. Check the MongoDB Node.js driver documentation to see if any of these options could be causing the issue.

    If none of these potential reasons seem to be causing the issue, there might be a problem with your Node.js environment or the MongoDB server itself. Try testing your Node.js client on a different machine or with a different MongoDB server to see if the problem persists Source 2, Source 4, Source 5, Source 7.

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  2. 0

    Looks like you have some ip config issue, so try 127.0.0.1 instead of localhost. it should work.

    OR

    you can set bindIp in your mongo config as

    net:
   bindIp: 127.0.0.1, ::1
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