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.
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Structured investigations for the failure modes engineers meet in real systems.
Diagnosing Missing Cookies in Nuxt SSR Server Context
Nuxt SSR often fails to read cookies server-side if headers are misrouted or missing. This guide shows where things break and how to reliably retrieve cookies in SSR.
Node.js Inspector Debugger: Diagnosing Protocol Disconnections and Async Breakpoints
A practical guide to debugging Node.js with the inspector protocol—covering disconnections, async stacks, and breakpoint failures.
Java Thread Deadlock Detection with jstack: A Practical Guide
Learn how to detect and fix Java thread deadlocks using jstack. This guide covers real-world patterns, command-line usage, and common pitfalls.
Spring Boot Auto-configuration Not Loading: Debugging Conditional Beans
A hands-on guide to debugging Spring Boot auto-configuration failures caused by missing or mismatched conditions, with concrete commands and real-world war stories.
Spring @Transactional Not Rolling Back: Root Causes & Fixes
A senior engineer's guide to why Spring @Transactional fails to roll back — covering checked exceptions, proxy bypass, and connection commit ordering.
Spring Boot Application Startup Failure: A Practical Debugging Guide
A concise guide to diagnosing Spring Boot startup failures with concrete commands, logs, and root causes.
Long-form thinking on debugging habits, observability, and the systems around the bug.
Assert Statements: Where They Help and Where They Hurt
Assert statements are a double-edged sword. Used correctly, they catch bugs early and document invariants. Used carelessly, they can mask failures and create security holes. Here's how to wield them effectively.
Debuggers vs Console.log: Why I Stopped Using Print Statements for Debugging
Print statements are the duct tape of debugging. They work for trivial issues, but for race conditions, async flows, or deep call stacks, a debugger saves hours. Here's what I learned after years of using both.
Treating Bugs as Hypotheses: How the Scientific Method Fixes Debugging
Frustrated by flailing through logs? The scientific method turns debugging into a reproducible process. Here's how to formulate hypotheses, design experiments, and isolate root causes with confidence.
How to Debug a Regression: A Practical Walkthrough
A practical, step-by-step guide to finding and fixing regression bugs, with real-world examples and concrete commands you can run today.
The Cost of Not Reproducing Bugs: Why Local Debugging Saves Hours
Skipping local reproduction leads to wasted hours, broken deploys, and frustrated teams. Here's why it's non-negotiable and how to do it right.
Debugging an Unfamiliar Codebase: A Systematic Approach
A repeatable process for debugging code you didn't write — with specific techniques, tooling choices, and a war story from a production outage at 2 AM.