Troubleshooting
Why isn't my cron job running?
Practical, fix-first guides for the most common reasons scheduled jobs silently stop — by platform and stack.
Hetzner
Hetzner cron job not running? Here's how to fix it
Your crontab entry never fires (or fires but does nothing) on a Hetzner VPS.
Docker
Docker container cron not running? Fixes that actually work
Cron inside your container never fires, or fires but can't send email or see your env vars.
Laravel
Laravel scheduler not running, or looking for an alternative?
schedule:run is set up but your Laravel scheduled tasks never execute on the server.
Kubernetes
Kubernetes CronJob not running? Diagnose it fast
Your CronJob exists but no Jobs are created, or pods start and fail without notice.
Ubuntu
Ubuntu cron not sending email? Why, and what to do instead
Your cron job runs but the output email (errors, reports) never arrives.
GitHub Actions
GitHub Actions cron schedule not running? Every silent cause
Your workflow has an `on: schedule` trigger but never runs, runs late, or silently stopped weeks ago.
Vercel
Vercel cron job not running? Check these first
Your `vercel.json` defines crons but the function never runs, runs at odd times, or returns 401s.
systemd
systemd timer not running? Diagnose it in five steps
Your `.timer` unit exists but the service never runs — or `list-timers` shows it fired and nothing happened.
AI agents
Scheduled AI agent not running? Diagnose it fast
The nightly run produced nothing — no output, no error, and nobody can say when it last worked.
Vercel
Vercel cron limits explained: Hobby vs Pro
Your cron needs to run more often, more precisely, or more reliably than your Vercel plan allows.