Resolving the Mongoose Buffering Timed Out Error in Node.js

Updated: December 30, 2023 By: Guest Contributor Post a comment

Understanding the Mongoose Error

The ‘Mongoose buffering timed out’ error typically occurs when Mongoose, a MongoDB object modeling tool for Node.js, attempts to execute an operation, but it can’t because the connection to the MongoDB database is not yet established. Mongoose has an internal buffer that will hold the commands for a period, but if the connection takes too long, the buffer will time out, and you’ll see this error message.

Solutions & Check-up

Ensuring Proper Connection

One straightforward way to address this issue is by verifying the MongoDB server is running and that your connection string is correct. Ensure that your server URI includes the proper credentials, hostname, port, and database name. Using the mongoose.connect() function, establish the connection and handle possible connection errors with event listeners for the connection object.

Using the `await` Operator

Incorporating async/await syntax in your connection setup is another effective strategy. You can use an async function to wait for the connection to MongoDB to be established before trying to execute any database operations. You’ll need to apply try-catch blocks for proper error handling. This ensures you only run operations once a connection is confirmed.

Creating a Stable Configuration

Addressing configuration issues in your Mongoose setup is also a solution. This includes setting the bufferCommands option to false to turn off Mongoose’s buffering or configuring the bufferMaxEntries to control the number of operations that can be buffered before timing out.

import mongoose from 'mongoose';

const connectDatabase = async () => {
  try {
    const dbUri = 'your-mongodb-uri';
    await mongoose.connect(dbUri, {
      useNewUrlParser: true,
      useUnifiedTopology: true,
      bufferCommands: false, // Disable mongoose buffering
      bufferMaxEntries: 0 // Set buffer max entries
    console.log('Database connected successfully.');
  } catch (error) {
    console.error('Database connection failed:', error);

// Later in your code ...

// To ensure buffering does not hold you back, only start applying
// database operations after the connection has been established and confirmed.

(async () => {
  await connectDatabase();
  // Execute your mongoose queries here, once connection is ensured.


In conclusion, dealing with the Mongoose buffering timed out error can be tackled by ensuring that the MongoDB server is accessible and that the connection string is correct, using async/await to make sure operations are performed after the connection is established, and altering Cofiguration settings relevant to Mongoose buffering behaviors. Remember that caring for database connectivity and stability is top priority when working with Mongoose in a Node.js environment.