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.
5 Questions to Ask Yourself Before Filing a Bug Report
A senior engineer's pre-flight checklist for bug reports — forged in the fire of a production incident that turned a 5-minute fix into a 3-hour hunt.
Binary Search for Bugs: Cutting Down Bisection Time with git bisect run
Automating git bisect with a script turns days of manual hunting into minutes. Here's how to build a reliable bisection harness for your codebase.
Reading a Call Stack: What Each Frame Actually Tells You
A call stack shows you the path your code took to crash. But most developers only look at the top frame. Here’s how to read the whole thing — including async traces, native frames, and minified code.
Using Breakpoints Effectively: Beyond Step and Continue
Most engineers know F9 to set a breakpoint and F5 to run. But breakpoints have hidden superpowers — conditional, logpoint, hit-count, and data breakpoints — that can cut debugging time in half. Here's how to use them with real examples.
Conditional Breakpoints: When and How to Use Them Beyond the Basics
Conditional breakpoints stop only when a specific condition is true, reducing noise in loops and high-frequency code. Here's how to wield them in Chrome DevTools, VS Code, and IntelliJ, plus a war story about a subtle race condition.
Debugging Character Encoding Problems: From Gibberish to Unicode
A practical guide to identifying and fixing character encoding problems, from broken UTF-8 to hidden BOM bytes, with real debugging examples.