MongooseError: Operation `x.findOne()` buffering timed out after 10000ms

Question

I am using Discord.JS v13 for sharding, and I am using mongoose for the database. I connect to mongoose in my sharding file (index.js) rather than in the bot.js because I need to use it there, but this isn't allowing me to get data from mongoose anywhere but index.js. I don't know why is this happening as this was perfectly fine a few days back and I haven't changed anything.

index.js (Sharding File)

// .....Sharding Manager
const dbURI = process.env.DBURI;

const mongoose = require("mongoose");
// noinspection JSCheckFunctionSignatures
mongoose.connect(dbURI, {
  useNewUrlParser: true,
  useUnifiedTopology: true,
});

/models/user.js (Schema File)

const mongoose = require("mongoose");
const userinfo = new mongoose.Schema({
  UserID: {
    type: String || Number,
    required: true,
  },
  /** Whole schema **/
});

const MessageModel = (module.exports = mongoose.model("muser_userinfo", userinfo));

scommands/filters.js (The File I want to use it at!)

const userinfo = require("../models/user.js");

const user_id = interaction.user.id;

const data = await userinfo.findOne({ UserID: user_id });
    if (!data) {
//....

Error

7|muser | MongooseError: Operation muser_userinfos.findOne()` buffering timed out after 10000ms 7|muser | at Timeout.<anonymous> (/root/Bots/muser/node_modules/mongoose/lib/drivers/node-mongodb-native/collection.js:185:20) 7|muser | at listOnTimeout (node:internal/timers:559:17) 7|muser | at processTimers (node:internal/timers:502:7) 

I have tried everything you can possibly think of, used find() instead of findOne(), used .then() on connect, double-checked the credentials and what not!

Answer 1

The ShardingManager generally spawns a process for each shard (unless you specify otherwise). If you're only connecting to your Mongo database from the sharding file then your bot client won't have access to it.

Try connecting to your Mongo database from the client too, it shouldn't matter too much since Mongo supports multiple connections.