Connection timeout 10000ms when upgraded mongoose from 7.4.5 to 8.7.1
Problem
Prerequisites - [x] I have written a descriptive issue title Mongoose version 8.7.1 Node.js version 20.x MongoDB version 6.9 Operating system None Operating system version (i.e. 20.04, 11.3, 10) _No response_ Issue Last night, I upgraded my mongodb and mongoose from versions 5.8.1 to 6.9 and. 7.4.5 to 8.7.1 respectively. I tested on my local. Everything worked fine. I promoted the changes to test env - AWS amplify - things were fine. Then, I moved the changes to production. My db is hosted on mongo atlas serverless cluster. On production, sometimes same queries will work fine but other times give timeout error with 10000ms. I mean same queries behaving differently. I have been scratching my head because both test and prod env are exactly similar except that prod is connected to my domain name. Please assist if someone has knowledge about this. sharing my connection code and one query that fails/passes abruptly. [code block] [code block]
Error Output
error with 10000ms. I mean same queries behaving differently.
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1 Fix
Increase Connection Timeout and Optimize Mongoose Settings
The connection timeout issue arises due to the upgraded Mongoose version's stricter handling of connection settings and potential network latency when connecting to MongoDB Atlas. The production environment may experience variable latency, leading to intermittent timeouts, especially under load or with specific queries.
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- 1
Increase Connection Timeout
Modify the connection options to increase the timeout settings for Mongoose. This will help accommodate any latency issues that may arise when connecting to the MongoDB Atlas serverless cluster.
javascriptconst mongoose = require('mongoose'); mongoose.connect('your_connection_string', { serverSelectionTimeoutMS: 20000, // Increase timeout to 20 seconds socketTimeoutMS: 45000, // Increase socket timeout to 45 seconds }); - 2
Enable Debugging for Mongoose
Enable Mongoose debugging to log all queries and connection events. This will help identify any specific queries that are causing timeouts and provide insights into the connection lifecycle.
javascriptmongoose.set('debug', true); - 3
Review Network Configuration
Check the network configuration of your MongoDB Atlas cluster. Ensure that the IP whitelist includes the production server's IP address and that there are no firewall rules blocking the connection.
- 4
Optimize Query Performance
Analyze the queries that are timing out. Use MongoDB Atlas performance tools to identify slow queries and optimize them by adding indexes or restructuring them as necessary.
- 5
Monitor Connection Health
Implement monitoring for your database connections to track the health and performance over time. Use tools like MongoDB Atlas monitoring features to keep an eye on connection metrics.
Validation
After implementing the changes, monitor the application for any timeout errors. Check the logs for Mongoose debug output to identify if the queries are still timing out. If the timeouts decrease and queries execute successfully, the fix is validated.
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Environment
Submitted by
Alex Chen
2450 rep