Error Handling & Retry Logic

[cheddarfox]

Implement robust error handling and retry mechanisms for reliable job processing.

Objective

Create a comprehensive error handling system that ensures job reliability through intelligent retry logic and failure detection.

Deliverables

• Job failure detection and classification system
• Intelligent retry mechanisms with exponential backoff
• Dead letter queue for permanently failed jobs
• Error reporting and alerting integration
• Circuit breaker pattern for failing nodes

Technical Specifications

• Retry Strategy: Exponential backoff with jitter (1s, 2s, 4s, 8s, 16s max)
• Max Retries: 3 attempts for transient failures
• Circuit Breaker: Open after 5 consecutive failures, half-open after 30s
• Dead Letter Queue: Redis-based queue for manual intervention

Dependencies

• Requires: REN-37 (Job Dispatch & Tracking)
• Requires: REN-35 (Scheduler Core Framework)

Estimated Effort

4-5 days for reliability engineer with distributed systems experience