I'm facing a MongooseServerSelectionError: when trying to connect to 127.0.0.1:27017. Despite trying all the solutions provided on StackOverflow, the issue persists

MongooseServerSelectionError: Failed to connect to 127.0.0.1:27017
    at NativeConnection.Connection.openUri (/mnt/d/Ecommerce/node_modules/mongoose/lib/connection.js:802:32)
    at /mnt/d/Ecommerce/node_modules/mongoose/lib/index.js:341:10        
    at /mnt/d/Ecommerce/node_modules/mongoose/lib/helpers/promiseOrCallback.js:32:5
    at new Promise (<anonymous>)
    at promiseOrCallback (/mnt/d/Ecommerce/node_modules/mongoose/lib/helpers/promiseOrCallback.js:31:10)
    at Mongoose._promiseOrCallback (/mnt/d/Ecommerce/node_modules/mongoose/lib/index.js:1141:10)
    at Mongoose.connect (/mnt/d/Ecommerce/node_modules/mongoose/lib/index.js:340:20)
    at connectDatabase (/mnt/d/Ecommerce/backend/config/database.js:4:14)
    at Object.<anonymous> (/mnt/d/Ecommerce/backend/server.js:11:1)      
    at Module._compile (internal/modules/cjs/loader.js:1085:14) {        
  reason: TopologyDescription {
    type: 'Unknown',
    servers: Map(1) { '127.0.0.1:27017' => [ServerDescription] },        
    stale: false,
    compatible: true,
    heartbeatFrequencyMS: 10000,
    localThresholdMS: 15,
    logicalSessionTimeoutMinutes: undefined
  }
}

I have also tried using 'mongod'.
I have made sure to create a folder in my C:\data\db directory.
Additionally, I have used the IP address 127.0.0.1 instead of 'localhost'.

Despite trying numerous solutions, I am still encountering this error. How can I troubleshoot and fix it?

javascriptmongodbexpress

Answer №1

Running this on a Windows system, I encountered an issue where my task manager had stopped a service and it was not starting automatically. This is why the program was not running as expected.

If you are facing the same error, try the following steps:

  1. Search for "services" in the Windows search bar
  2. Locate the mongoDB service in the list
  3. Manually start or restart it if it's currently stopped

Answer №2

For those using Linux and Mac, here are the steps I took directly from my terminal

1) Update the port number for mongos: cd ~
2) Use sudo nano /etc/mongod.conf
3) Find the line that reads: # network interfaces and update 27017 to 27018
4) Save the changes by pressing ctrl + x; then shift + y; then enter
5) Restart mongod by running sudo systemctl restart mongod
6) Verify if mongo is indeed running with sudo systemctl mongod

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