831 articles — Page 44 of 70
How to fix Spring Boot circular dependency errors — BeanCurrentlyInCreationException, refactoring to break cycles, @Lazy injection, setter injection, and @PostConstruct patterns.
How to fix Spring Security 403 Forbidden errors, CSRF token missing, incorrect security configuration, method security blocking requests, and how to debug the Spring Security filter chain.
How to fix Kubernetes ConfigMap updates not reaching running pods — why pods don't see updated values, how to trigger restarts, use live volume mounts, and automate ConfigMap rollouts with Reloader.
How to fix MongoDB 'not primary' errors when writing to a replica set, read preference misconfiguration, connecting to a secondary, replica set elections, and write concern settings.
How to fix Certbot certificate renewal failures — domain validation errors, port 80 blocked, nginx config issues, permissions, and automating renewals with systemd or cron.
How to fix Node.js UnhandledPromiseRejectionWarning and process crashes — why unhandled promise rejections crash Node.js 15+, how to add global handlers, find the source of the rejection, and fix async error handling.
How to fix Poetry dependency resolution errors — SolverProblemError when adding packages, conflicting version constraints, how to diagnose dependency trees, and workarounds for incompatible packages.
How to fix Python virtual environments using the wrong Python version — venv picking system Python instead of pyenv, specifying the interpreter path, and verifying the active environment.
How to fix AWS ECR authentication errors — no basic auth credentials, token expired, permission denied on push, and how to authenticate correctly from CI/CD pipelines and local development.
How to fix Django migration conflicts — why multiple leaf migrations conflict, how to merge conflicting migrations, resolve dependency chains, and set up a team workflow to prevent migration conflicts.
How to fix Docker build ARG variables that are empty or undefined inside RUN commands — why ARG scope is limited, how ARG and ENV interact, multi-stage build ARG scoping, and secrets that shouldn't use ARG.
How to fix GitHub Actions if conditions that don't evaluate correctly — why steps are skipped or always run, how to use context expressions, fix boolean checks, and handle job outputs in conditions.