Worker and Batch Job

Workers and batch jobs often run critical business processes without a user watching. They need clear scheduling, retry, idempotency, and completion signals.

Common patterns

• Queue consumer.
• Scheduled job.
• Batch import or export.
• Report generation.
• Data sync.
• Cleanup or lifecycle job.

Architecture shape

Required controls

• Idempotency for retries.
• Timeout and retry policy.
• Dead-letter handling.
• Completion and freshness metrics.
• Backpressure and concurrency limits.
• Runbook for replay or restart.
• Data reconciliation where records matter.

Readiness checks

Before production, confirm:

• Failed messages have an owner and replay process.
• Job completion is visible in dashboards.
• Alerting distinguishes delayed, failed, and stuck work.
• Restart behavior is safe.
• Downstream systems can handle replay or backfill volume.

Watchouts

• Silent job failure can become business process failure.
• Retrying writes without idempotency creates duplicates.
• Batch jobs can overwhelm downstream systems.
• Success should mean business completion, not only process exit code.