scn_id: SCN-OPS-RETRY-RECOVERY-001 title: Task Retry and Recovery Loop status: Draft version: v0.1.0 owners:

• name: Matrix Ops role: Platform Ops Lead contact: ops@artisan-cloud.com
• name: Eva Zhang role: Automation Steward contact: automation@artisan-cloud.com domains: [ops] layers: [ops, service] repos:
• key: powerx scope: core-platform responsibility: > Delay queues, retry strategies, dead-letter handling, recovery scripts related_usecases:
• doc_id: UC-OPS-RETRY-RECOVERY-001 layer: ops domain: ops last_reviewed_at: 2025-10-31

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Executive Summary

When a task execution fails, the platform must transition it into a delayed retry queue and escalate to dead-letter processing and manual recovery once thresholds are exceeded. This sub-scenario defines retry policies, backoff algorithms, DLQ governance, and runbook-based recovery so that critical tasks can be restored under abnormal conditions with full audit traceability.

Scope & Guardrails

• In Scope: Delay queue enqueue/dequeue, retry policies, backoff algorithms, dead-letter queues, work-order escalation, runbook recovery, auditing, and alerting.
• Out of Scope: Cross-repo data repair, financial compensation, and infrastructure-level disaster recovery.
• Environment & Flags: "task-retry-queue, dlq-inspector, audit-streaming; depends on Redis/Kafka, work-order tooling, and PagerDuty/Slack alerts."

Participants & Responsibilities

Scope	Repository	Layer	Responsibilities	Owners
core-platform	powerx	ops	Delay queue, retry strategy, DLQ processing, metrics collection	Matrix Ops (Platform Ops Lead / ops@artisan-cloud.com)
automation	powerx	ops	Runbooks, work-order integration, alert configuration, queue inspection scripts	Eva Zhang (Automation Steward / automation@artisan-cloud.com)

End-to-End Flow

1. Stage 1 – Failure Enqueue: Task failure events trigger retry policies, enqueueing jobs into the delay queue with idempotency tokens.
2. Stage 2 – Delayed Retry: When due, the task is executed again; success closes alerts and updates status.
3. Stage 3 – Dead-letter Escalation: Repeated failures move the task into the DLQ, automatically creating a work order and firing PagerDuty.
4. Stage 4 – Manual Recovery & Closure: Operators follow runbooks to remediate, recording outcomes and syncing audits/metrics.

Key Interactions & Contracts

• APIs / Events: "EVENT task.execution.failed, EVENT task.retry.scheduled, POST /internal/tasks/retry, POST /ops/workorders."
• Configs / Schemas: "config/tasks/retry-policies.yaml, docs/standards/ops/task-retry-governance.md, docs/standards/events/retry-status-schema.md."
• Security / Compliance: Retry idempotency validation, work-order approvals, audit logging, safeguards against duplicate execution and privilege escalation.

Usecase Links

• UC-OPS-RETRY-RECOVERY-001 — Delay queue retry and recovery loop.

Acceptance Criteria

1. Automatic retry success rate ≥ 90%, retry latency adheres to SLA (default 2-minute backoff).
2. Work orders are created and on-call responders notified within 5 minutes after DLQ escalation; manual recovery completion rate ≥ 95%.
3. Ops console displays real-time views for retry queues, DLQ, and recovery status with one-click replay and policy tuning.

Telemetry & Ops

• Metrics: "task.retry.scheduled_total, task.retry.success_total, task.retry.failure_total, task.retry.dlq_total, task.retry.escalated_total."
• Alert thresholds: Retry failure rate > 15% over 10 minutes, DLQ size beyond threshold, work-order creation failures.
• Observability sources: "Grafana Runtime Ops / Retry & Recovery, Datadog task.retry.*, Ops console recovery dashboard, scripts/ops/retry-inspect.mjs."

Open Issues & Follow-ups

Risk / Item	Impact	Owner	ETA
DLQ cleanup is not automated	Work-order backlog and delayed recovery	Matrix Ops	2025-11-07
Retry strategy not aligned with business SLA	Recovery might be delayed	Eva Zhang	2025-11-14

Appendix

• docs/meta/scenarios/powerx/core-platform/runtime-ops/event-and-taskflow-management/primary.md
• scripts/ops/retry-inspect.mjs, scripts/ops/recovery-runbook.mjs
• Retry governance runbook (Confluence: Runtime-Ops-Retry-Recovery)