Author
Dan Ochoa
Software engineer
Dan Ochoa is a software engineer in Orlando, Florida, and builds CronRadar, monitoring for scheduled jobs that fail quietly. At Coral Vita he builds the control systems that run water treatment and per-zone life support for a coral-reef restoration facility.
Guides by Dan Ochoa (113)
- APScheduler Running Twice: Gunicorn Workers, Reloaders, and --preload
- Better Stack Heartbeats vs a Dedicated Cron Monitor: Period, Grace, Pricing
- Celery Task Retries: self.retry, autoretry_for, and Final-Failure Alerts
- Crontab Errors: "bad minute", "premature EOF", and Other Messages
- GitLab Scheduled Pipelines: Delays, Inactive Schedules, and Alerts
- Hangfire Dashboard Authorization: 401 in Production, Policies, and Read-Only
- Hangfire Dependency Injection: Scoped Services, DbContext, and Disposed Objects
- NestJS Scheduled Tasks: @Cron, Errors, and Multiple Instances
- Node.js Schedulers Compared: cron, node-cron, node-schedule, croner, Agenda, BullMQ
- Opsgenie Heartbeat Migration: Intervals, JSM Heartbeats, and Cron Schedules
- The Python schedule Library in Production: Exceptions, Threads, and Restarts
- Quartz.NET Cron Expressions: Seven Fields, L, W, #, and Time Zones
- Run Claude Code and Codex on a Schedule: Auth, Limits, Results
- UptimeRobot Heartbeat Monitoring for Cron Jobs: Limits and Plans
- AI Agent Cron Monitoring Setup: Scoped Access, Verified Runs
- Airflow DAG Not Running on Schedule: Missed Runs, SLAs, Alerts
- Anacron vs Cron: How /etc/anacrontab Runs Daily Jobs
- EventBridge Scheduler Cron: Expressions, Retries, and Monitoring
- Azure Functions Timer Trigger: NCRONTAB, Missed Runs, and Alerts
- BullMQ Repeatable Jobs and Job Schedulers: What Breaks in Production
- Monitor Billing Cron Jobs, Renewals, Emails, and Reports
- Celery Beat Not Running Tasks: A Troubleshooting Guide
- Certbot Renew Cron: Monitor Renewals Before Certificates Expire
- Cloudflare Cron Triggers: How Scheduled Workers Run and How to Monitor
- Coravel Scheduler: Scheduling and Monitoring Tasks in ASP.NET Core
- cPanel Cron Jobs: PHP Paths, Output Emails, and Monitoring
- Cron Daylight Saving Time: Skipped and Doubled Runs
- Cron Environment Variables: PATH, SHELL, and Why Scripts Fail
- How to Run Cron Every 30 Seconds (and When Not To)
- Cron Job Monitoring Grace Period: How Long to Wait Before Alerting
- Cron Implementations Compared: cronie, Debian, BusyBox, fcron
- Cron in Docker Containers: Run Scheduled Jobs Correctly
- Cron Job Alerting: What to Alert On Without Alert Fatigue
- Tracking Cron Job Duration: Catch Slow Runs Before They Overlap
- How to Retry Failed Cron Jobs Without Hiding the Failure
- Cron Job Running Twice? Find the Duplicate and Fix It
- Cron Job Hanging? Find the Cause, Add Timeouts, Catch Stuck Runs
- Cron Last Day of Month, Last Weekday, and First Monday
- Cron Jitter: Why Not to Run Every Cron Job at Midnight
- Cron Monitoring vs Uptime Monitoring vs APM: What Each Catches
- Cron "No MTA Installed, Discarding Output": Meaning and Fixes
- @reboot in Cron: How It Works and Why It Fails
- Cron Security: Hardening Scheduled Jobs on Linux
- Shell Script for Cron Job Best Practices: Exit Codes, Traps, Logging
- Cron Timezone: CRON_TZ, TZ, and Jobs That Run at the Wrong Time
- Crontab Command Guide: Edit, List, and Manage Cron Jobs Safely
- Crontab Version Control: Deploy Cron Jobs as Code, Detect Drift
- Datadog Cron Job Monitoring: Options, Gaps, and Dedicated Monitors
- Dead Man's Snitch vs CronRadar: Snitch Intervals and Cron Schedules
- Distributed Cron: Running Scheduled Jobs Once Across Many Servers
- .NET BackgroundService Scheduled Tasks With PeriodicTimer and Cron
- ETL Job Monitoring: Freshness, Row Counts, and Silent Failures
- GitHub Actions Schedule: Delays, Skipped Runs, and Monitoring
- Golang Cron Jobs: robfig/cron, gocron, and Monitoring Each Run
- Google Cloud Scheduler: Retries, Deadlines, and Monitoring
- Hangfire Automatic Retry: Configure Attempts and Alert on Failure
- Hangfire Cron Expressions: Syntax, Time Zones, and DST
- Hangfire DisableConcurrentExecution: Wait, Skip, or Serialize Jobs
- Hangfire Job Stuck in Processing: Orphaned or Still Running?
- Hangfire Recurring Job Not Running? 9 Causes and How to Check
- Hangfire vs Quartz.NET vs BackgroundService: Which .NET Scheduler?
- Heroku Scheduler: Best-Effort Jobs, Clock Processes, and Monitoring
- A History of Cron: From Sixth Edition Unix to Kubernetes
- Idempotent Cron Jobs: Make Every Scheduled Run Safe to Repeat
- Jenkins Cron: Scheduled Builds, the H Token, and Missed Runs
- Laravel Schedule Not Running: Causes and Fixes
- Cron on macOS: launchd Jobs and Why Yours Didn't Run
- MCP Server Cron Monitoring: Tools, Client Setup, and Limits
- Missed Cron Job After Reboot: What Each Scheduler Does
- How to Monitor Backup Cron Jobs and Prove Each Backup Is Usable
- Monitor Cron Jobs With Prometheus: Textfile, Pushgateway, Alerts
- Monitor Scheduled LLM Jobs and AI Agent Runs: Failures That Exit 0
- Cron Jobs on Render, Railway, and Fly.io: How Each Platform Runs Them
- Monitoring pg_cron Jobs in PostgreSQL and Supabase
- Prevent Overlapping Cron Jobs: flock, Locks, and Concurrency Policies
- Push vs Pull Monitoring for Scheduled Jobs: Heartbeats vs Scraping
- Python Script Cron Job: Virtualenvs, Paths, and Logging
- Quartz.NET Clustering: Run Each Job Once Across Many Servers
- Quartz.NET Job Not Firing: A Troubleshooting Checklist
- Quartz.NET Misfire Instructions: Every Trigger Type Explained
- Rails Scheduled Jobs: Solid Queue, Whenever, and GoodJob Cron
- AI-Generated Cron Jobs: 13 Mistakes to Catch in Code Review
- Scheduled Job Inventory: Find Every Cron Job You Run
- Cron Job Logging: What Each Run Should Record
- Cron Job Runbook Template: What to Write Before the Alert Fires
- Cron Job Succeeded but Did Nothing? Exit Code 0 Isn't Success
- Self-Hosted Cron Monitoring: Healthchecks, Uptime Kuma, or DIY
- Sentry Crons vs a Dedicated Cron Monitor: Which Fits Your Jobs
- Spring @Scheduled Cron Jobs: Syntax, Thread Pools, and Monitoring
- SQL Server Agent Job Monitoring: History, Failures, and Missed Runs
- Symfony Scheduler: Recurring Messages, Workers, and Monitoring
- systemd Timers: A Complete Guide to Scheduling With OnCalendar
- systemd Timers vs Cron: Which to Use and How to Migrate
- How to Test a Cron Job Before It Runs in Production
- Uptime Kuma Cron Job Monitoring: Push URLs and Intervals
- Vercel Cron Jobs: Limits, Timing, and Monitoring
- What Is a Cron Job? How Cron Works and What It Won't Do
- Windows Task Scheduler Monitoring: Result Codes, History, Alerts
- Cron Expression Syntax: Fields, Examples, and Common Mistakes
- Preventing Errors in Workflow Automation: A Checklist for Scheduled Jobs
- Cron Job Dead Man's Switch: Heartbeat Monitoring Explained
- Cron Job Not Running? Check These 9 Causes
- How to Know If a Cron Job Ran (or Failed)
- How to Monitor WordPress Cron Jobs (WP-Cron)
- Python scheduler monitoring: APScheduler failures and missed runs
- Sidekiq Monitoring: Queue Latency, Failed Jobs, and Missed Runs
- Node.js Cron Job Monitoring with node-cron and node-schedule
- Django Cron Jobs: How to Monitor Scheduled Tasks
- Kubernetes CronJob Monitoring: From Setup to Alerting
- Quartz.NET Monitoring: The Complete Guide for .NET Developers
- Hangfire Monitoring: Job Status, Health Checks, and Alerts
- Celery Task Monitoring: The Complete Guide
- How to Monitor Laravel Scheduled Tasks in Production