Cheatsheets
Node.js troubleshooting steps

Node.js troubleshooting steps

Check application logs

Review console logs and errors to identify runtime issues, particularly uncaught exceptions.
Inspect event loop lag

Ensure the Node.js event loop isn't blocked by long-running synchronous operations.
Monitor memory leaks

Analyze heap memory usage over time to ensure that objects are being garbage collected.
Review asynchronous function performance

Ensure asynchronous functions (async/await or callbacks) are resolving correctly and not causing deadlocks or memory leaks.
Check database connection handling

Ensure database connections (MongoDB, MySQL, etc.) are properly managed and closed when no longer needed.
Audit NPM dependencies

Verify that NPM packages are up to date, secure, and not causing compatibility issues.
Monitor CPU usage

Ensure that the Node.js process isn't using excessive CPU, which can affect application performance, especially in single-threaded environments.

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Node.js troubleshooting steps