Celery — Duplicate processing

What This Cluster Means

Celery cluster (6 fixes): Duplicate processing / at-least-once effects: retries, idempotency gaps, or double-sends.

Top Queries / Error Strings

These are the lines developers tend to search during incidents.

• Chain of groups causing duplicate tasks
• Completed tasks restore on shutdown causing duplicates for recursive tasks
• Duplicate executions and django-celery-results backend exceptions when chaining 4x number of groups
• Duplicate param 'uid' in CeleryDaemonCommand
• or possible duplicates to this issue as requested by the checklist above.

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