Problem
A batch publishing system has no idempotency check, so restarting a failed job can create duplicate posts for assets that already succeeded.
Solution
Root Cause / Diagnostic:
Non-idempotent API calls lack unique client-generated request tokens or stateful execution records. When a transient network timeout or script crash interrupts a batch syndication run, naive retry logic re-executes all payload requests from the beginning, creating duplicate live posts across social feeds.
Actionable Step-by-Step Fix:
1. Implement Idempotency Keys in API Payloads: Include a deterministic Idempotency-Key header (e.g., hash of Video_UUID + Platform_ID + Target_Date) with all API requests to ensure platforms reject duplicate execution attempts.
2. Build Stateful Progress Tracking: Implement a transactional database (Redis or SQLite) that logs state transitions (PENDING, IN_PROGRESS, PUBLISHED) per asset; wrap retries in checks that process only unfulfilled states.
3. Add Pre-Publish Query Verification: Before executing a video creation API call, execute a search query against the channel's published assets for matching metadata or tags created within the previous 24 hours.
Pro Creator Tip:
Always design syndication workers to be stateless and pull jobs from a reliable queue (e.g., AWS SQS or Celery) with explicit message acknowledgment (ACK) only after confirmed publication, preventing duplicate task execution.
Non-idempotent API calls lack unique client-generated request tokens or stateful execution records. When a transient network timeout or script crash interrupts a batch syndication run, naive retry logic re-executes all payload requests from the beginning, creating duplicate live posts across social feeds.
Actionable Step-by-Step Fix:
1. Implement Idempotency Keys in API Payloads: Include a deterministic Idempotency-Key header (e.g., hash of Video_UUID + Platform_ID + Target_Date) with all API requests to ensure platforms reject duplicate execution attempts.
2. Build Stateful Progress Tracking: Implement a transactional database (Redis or SQLite) that logs state transitions (PENDING, IN_PROGRESS, PUBLISHED) per asset; wrap retries in checks that process only unfulfilled states.
3. Add Pre-Publish Query Verification: Before executing a video creation API call, execute a search query against the channel's published assets for matching metadata or tags created within the previous 24 hours.
Pro Creator Tip:
Always design syndication workers to be stateless and pull jobs from a reliable queue (e.g., AWS SQS or Celery) with explicit message acknowledgment (ACK) only after confirmed publication, preventing duplicate task execution.