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.
Kubernetes Pod DNS Resolution Failure: Debugging Steps & Fixes
A practical guide to diagnosing and fixing DNS resolution failures in Kubernetes pods, covering cluster DNS, CoreDNS, and network policies.
Debugging Kubernetes Resource Quota Exceeded
A practical guide for diagnosing and fixing Kubernetes resource quota exceeded errors, covering common causes and verification steps.
Debugging Kubernetes Init Containers That Never Complete
A field-tested guide to diagnosing and fixing init containers that hang, crash, or silently fail in Kubernetes.
Debugging Missing Artifacts in Docker Multi-Stage Builds
When a Docker multi-stage build produces a smaller final image but the expected binary or file is not present, the cause is often a copy-from mistake or builder stage mislabeling.
Docker Build Cache Invalidation: Why Your Builds Are Slow
A practical guide to debugging slow Docker builds caused by cache invalidation. Covers common pitfalls like COPY order, build args, and layer reuse.
Docker Permission Denied When Running a Container
A step-by-step guide to diagnosing and fixing 'permission denied' errors when executing docker run, including file permissions, user namespaces, and SELinux.
Long-form thinking on debugging habits, observability, and the systems around the bug.
Logs, Traces, and the Lies They Tell: Debugging a Stuck Queue in Production
A single stuck queue brought down an entire checkout flow. Here's how we traced the failure across services, what the logs didn't say, and the tools that finally showed the truth.
Pair Debugging: How to Debug Together Without Killing Each Other
Pair debugging sounds great on paper. In practice, it's easy to step on each other's toes, go silent, or fight over the keyboard. Here's how to make it work.
Debugging with AI Tools: What Worked and What Didn't in Production
After a year of using GPT-4, Copilot, and Claude to hunt production bugs, here's what actually helped — and what sent me down dead ends.
How to Debug Legacy Code Without Losing Your Mind
A pragmatic approach to debugging code you didn't write, with techniques for tracing execution, isolating side effects, and making safe edits.
Debugging Feature Flag Rollouts: Tracing the Live-at-5 Incident
A misconfigured feature flag triggered a cascading failure in production. Here's how we traced the root cause and built a better debugging toolkit.
How to Ask for Debugging Help Without Wasting Everyone's Time
Asking for debugging help is a skill. Here's how to provide enough context, show your work, and frame the problem so others can actually help you.