Kafka - Event-Driven Architecture
Given a Saga with three steps: A, B, and C, where each step publishes an event to Kafka, what happens if step B fails after step A succeeds?
Given a Saga with three steps: A, B, and C, where each step publishes an event to Kafka, what happens if step B fails after step A succeeds?
medium📝 Predict Output Q13 of 15
Step-by-Step Solution
Solution:
Step 1: Understand failure handling in Saga
If a step fails, previous successful steps must be undone using compensating actions.Step 2: Apply to the scenario
Since step B failed after A succeeded, step A must be compensated by sending a rollback event.Final Answer:
Step A is compensated by sending a rollback event -> Option AQuick Check:
Failure in step B triggers compensation for step A [OK]
Quick Trick: Failed step triggers compensation for prior steps [OK]
Common Mistakes:
MISTAKES- Assuming next steps run despite failure
- Thinking Saga aborts without compensation
- Believing retries never stop
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