How do I retry failed cron jobs?
Implement a retry wrapper that catches errors and retries with exponential backoff (5s, 10s, 20s). Only retry on transient errors (network, database). Don't retry on logic errors. Send an alert if all retries fail. Track retry attempts in the CronJob collection.
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More FAQs in Cron Job Error Handling and Monitoring Reliable Scheduled Tasks in Node.js
Always wrap the job logic in try-catch. Log the error with details (message, stack, job name). Send an alert (email, Slack, SMS) to the admin. Track the failure in a CronJob database collection. Consider retrying with exponential backoff for transient errors.
Use a flag: if (isRunning[jobName]) { console.log('Already running, skipping'); return; } Set isRunning[jobName] = true before the job and false in a finally block. This prevents multiple instances from running simultaneously if the job takes longer than the interval.
Track each job execution in a CronJob database collection (jobName, status, startTime, endTime, duration, result, error). Create a /health/cron endpoint that shows the last status and failure count for each job. Set up alerts for failed jobs and long-running jobs.
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