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 Sidecar Container Not Starting: Pod Lifecycle Debugging
A practical guide to debugging Kubernetes sidecar containers that fail to start, covering init container dependencies, resource limits, and readiness probe misconfigurations.
Kubernetes Pod Affinity Scheduling Not Placing: Debugging Why Pods Stay Pending
Pod affinity rules can prevent scheduling even when resources are available. This guide shows how to diagnose and fix pod affinity failures in Kubernetes.
Debugging AWS Lambda Cold Start Latency
A practical guide to diagnosing and fixing high cold start latency in AWS Lambda, covering code, config, and runtime issues.
AWS Lambda Function Timeout: Debugging and Fixing Cold Starts, Throttling, and Concurrency Issues
A practical guide to diagnosing and fixing AWS Lambda timeout errors, covering cold starts, VPC latency, and concurrency limits with real commands.
AWS S3 403 Access Denied: Debugging Bucket Policy Issues
Step-by-step guide to diagnose and fix 403 Access Denied errors from S3 bucket policies, covering common misconfigurations and hard-to-spot pitfalls.
Debugging AWS IAM Permission Denied Errors
A practical guide to diagnosing and fixing AWS IAM permission denied errors, with real commands and root causes.
Long-form thinking on debugging habits, observability, and the systems around the bug.
The Debugging Mindset: A Systematic Method for Finding Root Causes
A repeatable, hypothesis-driven approach to debugging that works for intermittent failures, performance regressions, and production incidents.
Analyzing a Core Dump: What to Do When Your Process Goes Silent
A core dump is your process's last scream. Here's how to make it talk.
Timeouts Every Engineer Gets Wrong (and How to Fix Them)
Most timeout bugs aren't logic errors — they're configuration failures. Here's how to stop treating timeouts as magic numbers and start engineering them deliberately.
Backpressure in Streaming Systems: When Your Pipeline Fights Back
Backpressure is the system's way of saying 'slow down.' Ignore it and you get OOM crashes, silent data loss, or cascading failures. Here's how to design for it.
Finding Memory Leaks Step by Step: A Systematic Approach
Memory leaks are the silent killers of long-running services. Here's a repeatable process to hunt them down, from heap dumps to production monitoring.