Buglyst Blog
Learn to debug under pressure.
Playbooks for fast pattern recognition, guides for the full investigation, and articles for the engineering judgment around the edges.
17 playbooks · 509 guides · 95 articles · 12 linked practice labs ·skip to practice
Fast pattern recognition for the production failures engineers see most often.
17 playbooks
Debugging Env Var Issues
A concise checklist for incidents where local works but CI, staging, or production changes behavior.
Debugging Cache Stampedes
How to recognize and contain request spikes when cached data expires.
Debugging CORS Origin Bugs
A practical way to inspect origin parsing, credentials, and header behavior.
Debugging Retry Bugs
Retry issues often hide the first failure and create duplicate work.
Debugging Timezone Bugs
Time bugs usually live at day boundaries, DST changes, and unit conversions.
Debugging Pagination Bugs
Pagination bugs hide in boundary math, cursor reuse, and new records arriving between pages.
Structured investigations for the failure modes engineers meet in real systems.
Debugging HPACK Errors in HTTP/2 Header Compression
A practical guide to diagnosing and fixing HTTP/2 header compression errors caused by HPACK implementation bugs, oversized headers, or compression context mismatches.
Nginx Upstream 503 Service Unavailable: A Production Debugging Guide
A practical guide to diagnosing and fixing Nginx 503 errors caused by upstream failures, including connection limits, timeouts, and health check misconfigurations.
Debugging Nginx Rate Limiting 503 Errors
A practical guide to diagnosing and fixing 503 errors caused by Nginx rate limiting, with concrete commands and real-world scenarios.
SameSite Cookie Attribute Blocking Requests: Debugging Guide
A practical guide to diagnosing and fixing request failures caused by the SameSite cookie attribute, including cross-site and same-site nuances.
CSRF Token Validation Failed: Real-World Debugging Guide
A practical debugging guide for CSRF token validation failures in web applications, covering root causes, diagnosis, and fixes beyond the textbook.
Content Security Policy Blocking Resource: Debugging and Fixing CSP Violations
A direct guide to diagnosing and fixing CSP violations when resources like scripts, styles, or images are blocked by Content Security Policy headers.
Long-form thinking on debugging habits, observability, and the systems around the bug.
Five Debugging Habits That Separate Seniors from Juniors
It's not tools. It's not years of experience. It's five repeatable habits that senior engineers do reflexively and juniors haven't built yet.
Why Your Production Logs Are Lying to You
Logs tell you what the code reported. They almost never tell you what actually happened. Here is the gap, and how to close it.
The Real Cost of Console.log Debugging (and What to Use Instead)
Every engineer reaches for console.log. Most do not think about what it costs — in time, in performance, or in production readiness. Here is the honest accounting.
Interpreting Stack Traces: Practical Steps for Faster Debugging
Stack traces can be dense, but reading them fluently accelerates triage and root cause analysis. This article explains how to extract actionable information, with real-world context.
Efficient Debugging with git bisect: Going Beyond Binary Search
This article explains how to incorporate git bisect into your debugging workflow, focusing on practical execution, automation, and common edge cases.
Applying Rubber Duck Debugging to Complex Engineering Problems
Rubber duck debugging isn’t just a quirky solo exercise. I’ll show how explaining code out loud surfaces misunderstandings and reduces wasted team cycles.