Tune retry delay for a throttled dependency
Immediate retries amplify the dependency's temporary throttling.
- Focused work estimate
- 2h 30m + prerequisites
- Priority in the scenario
- High
- Engineering practice
- Backoff · Resilience
Estimated field mix
- Site reliability60%
- Integrations40%
Field percentages are editorial estimates of the ticket's engineering focus. They total 100%; they are not measured time, proficiency scores, or ownership evidence.
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Project context
A fictional document service has a rising processing backlog. Operators cannot tell whether arrivals, worker failures, or a slow dependency is responsible.
Setup prerequisites
- Create a bounded local queue simulation with synthetic jobs and controllable worker/dependency failures.
Preceding work
Complete these dependencies, or supply their agreed outputs before taking this ticket.
Acceptance criteria
- Respect bounded retry-after guidance.
- Apply jitter with reproducible test control.
- Cap total attempts and elapsed time.
Implementation constraints
- Never retry permanent validation or authorization failures.
Verification to include
- Recover after a temporary throttle.
- Exhaust a persistent outage without a retry storm.
Deliverables
- Dependency retry policy.
Rollout and recovery
Trial on one job class; pause dispatch if throttling remains sustained.
Value of the work
For the engineer: Practice incident timelines, queue diagnosis, and measured recovery.
For the team: Produce a repeatable response that preserves work integrity and exposes customer delay.
Evidence boundaries
Outcome Evidence: Tests, patches, and runbooks are requested deliverables. They become Outcome Evidence only through a qualified Mission and immutable Evidence IDs.
Ownership Evidence: Independent adaptation must be observed under a declared verification policy and cite immutable Evidence IDs. Completing a planning ticket establishes no Ownership Evidence.