Lesson 1
Distributed failure is normal
Dependencies can be slow, unavailable or inconsistent. Quality strategy must assume imperfect networks.
All learning tracks
API & Integration QualityIntermediate 90 min
Integration & Resilience Testing
Test timeouts, retries, duplicate messages, partial failure and eventual consistency across integrated systems.
ResilienceEventsDistributed Systems
Learning outcomes
Test partial failures
Validate idempotency
Reason about eventual consistency
Guided lessons
Learn the engineering thinking
Lesson 2
Timeouts and retries
Retries require bounded policies and idempotent operations or they can amplify incidents.
Lesson 3
Duplicate events
Message delivery systems may redeliver. Consumers should avoid applying the same business effect twice.
Lesson 4
Eventual consistency
Some workflows become correct over time rather than immediately, so assertions need clear convergence expectations.
Lesson 5
Compensating actions
When multi-step workflows partially fail, systems may need rollback, reconciliation or manual recovery.
Hands-on practice
Do something with what you learned
Do not just tick these mentally. Write the query, create the test matrix, refactor the code, or document the decision. Practical evidence is the point.