Debugging

9 pages in this section.

Why debugging a running production Node.js service is a different discipline from debugging code on a laptop, and the systematic method - observe, narrow, hypothesize, verify - that separates fast root-cause fixes from guesswork.

Explainer Nodejs Debugging Incident Response

Debugging Basics

Learn to debug Node.js backends with 8 examples. Use node --inspect, debugger statements, and Chrome DevTools for effective troubleshooting.

Nodejs Debugging Scenarios Basics Inspect

Memory Leak Hunt

Debug Node.js memory leaks with heap snapshots, clinic heapprofiler, and code review. Learn to identify and fix common leak patterns.

Nodejs Debugging Scenarios Memory Heap

Promise That Never Settles

Diagnose and fix Node.js Promise issues that cause requests to hang, like missing rejections or abandoned database clients. Learn how to implement Promise timeouts.

Nodejs Debugging Scenarios Promises Async

Event-Loop Stall Incident

Diagnose and resolve event-loop stalls in Node.js caused by synchronous CPU work like large JSON parsing. Learn to identify symptoms and implement solutions.

Nodejs Debugging Scenarios Event Loop Performance

Connection Pool Exhaustion

Nodejs Debugging Scenarios Postgres Connection Pool

Unhandled Rejection Production Outage

Nodejs Debugging Scenarios Unhandled Rejection Reliability

Debugging Best Practices

Learn Node.js debugging best practices, including reproducing issues with production-like data, using instrumentation, and leveraging local debugging tools.

Nodejs Debugging Scenarios Best Practices List

Debugging Highlights Summary

A single-page roundup of every highlight bullet from the 8 pages in the Debugging section, grouped by source page so you can scan all 32 takeaways without opening each article individually.

Highlights Summary Debugging Scenarios

Debugging

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Debugging