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.
Spring Security 403 Forbidden Error Debugging
A hands-on guide to diagnosing and fixing 403 Forbidden errors in Spring Security applications, covering hidden causes like annotation misconfigurations and role hierarchy issues.
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.
Spring JPA LazyInitializationException: Root Causes and Fixes Beyond OpenSessionInView
A practical guide to diagnosing and fixing LazyInitializationException in Spring Data JPA, covering real-world causes like serialization, caching, and transaction boundaries.
Diagnosing and Fixing Java OutOfMemoryError: Java Heap Space
A practical guide to diagnosing Java heap OutOfMemoryError in production, covering non-obvious causes like GC overhead, native memory leaks, and permgen/metaspace issues.
Debugging java.lang.StackOverflowError from Recursion
A practical guide to diagnosing and fixing StackOverflowError caused by unbounded recursion in Java, including thread stack analysis, JVM flags, and code patterns that actually cause this.
Hibernate N+1 Select Problem: Detection, Diagnosis, and Fixes
A hands-on guide to detecting and fixing the Hibernate N+1 query problem with real SQL profiling, lazy loading traps, and JPA fetch strategies.
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.