Repair Celery Priority Queue Prefetch Starvation

Repair Celery Priority Queue Prefetch Starvation — SYNTHETIC EVIDENCE-LIMITED REVIEW

Case received

High-priority tasks remain queued while idle workers retain lower-priority reservations.

Evidence register

• S1: Celery worker prefetch telemetry and broker priority queue depth — PARTIAL / UNVERIFIED.
• S2: approved operating baseline / documented policy — NOT PROVIDED; REQUIRED TO VERIFY.
• S3: timestamped revision or change record — NOT PROVIDED; REQUIRED TO VERIFY.
• S4: accountable reviewer and approval evidence — NOT PROVIDED; REQUIRED TO VERIFY.

Investigation checks

1. Establish the identity, timestamp basis and revision lineage of Celery worker prefetch telemetry and broker priority queue depth; document missing or contradictory records. — PENDING CORROBORATION.
2. Reconstruct the event sequence surrounding prefetch multiplier monopolizes task reservations ahead of urgent jobs, citing exact record identifiers and independent checks. — PENDING CORROBORATION.
3. Compare the evidence with the approved baseline; test the competing explanations for: High-priority tasks remain queued while idle workers retain lower-priority reservations. — PENDING CORROBORATION.
4. Draft a non-executing, owner-approved validation sequence and rejection criteria for priority fairness and reservation test suite. — PENDING CORROBORATION.

Deliverables

• time-aligned evidence index for Celery worker prefetch telemetry and broker priority queue depth: DRAFT / INCOMPLETE until inputs are validated.
• exceptions and alternative hypotheses for prefetch multiplier monopolizes task reservations ahead of urgent jobs: DRAFT / INCOMPLETE until inputs are validated.
• approval-gated priority fairness and reservation test suite and verification criteria: DRAFT / INCOMPLETE until inputs are validated.

Decision gate

INCOMPLETE — HUMAN REVIEW REQUIRED. Sources, scope, time basis and sign-off remain unverified. No live change or approval has occurred.