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.
18 playbooks · 509 guides · 96 articles · 13 linked practice labs ·skip to practice
Fast pattern recognition for the production failures engineers see most often.
18 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.
AWS DynamoDB Throttling: Provisioned Throughput Exceeded Debugging Guide
A hands-on guide to diagnosing and fixing DynamoDB throttling errors caused by exceeded provisioned throughput, with real-world tactics and a war story.
AWS Step Functions State Machine Failed: Debugging Execution Failures
A practical guide to diagnosing and fixing AWS Step Functions execution failures, covering common causes, quick diagnosis steps, and real-world debugging patterns.
Debugging AWS AppSync Resolver Mapping Errors
A practical guide to diagnosing and fixing VTL and JavaScript mapping errors in AWS AppSync resolvers, covering common pitfalls and production debugging techniques.
Debugging GCP Cloud SQL Connection Limit Exceeded
Diagnose and resolve 'too many connections' errors in GCP Cloud SQL with actionable steps, root causes, and a real-world incident.
Azure AD Authentication Token Error — A Practical Debugging Guide
A hands-on guide to diagnosing and fixing Azure AD token errors like AADSTS700016, 500208, and 65001. Covers common causes, quick diagnosis steps, and real-world fix patterns.
Azure Functions Cold Start: Diagnosing and Fixing Slow First Requests
A targeted guide for identifying and eliminating cold start latency in Azure Functions, covering platform settings, code patterns, and runtime diagnostics.
Long-form thinking on debugging habits, observability, and the systems around the bug.
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.
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.