Kafka - Event-Driven Architecture
In a Kafka-based Saga, if the event sequence is: Step1 success event, Step2 success event, then Step3 failure event, what is the correct next step?
In a Kafka-based Saga, if the event sequence is: Step1 success event, Step2 success event, then Step3 failure event, what is the correct next step?
medium📝 Predict Output Q4 of 15
Step-by-Step Solution
Solution:
Step 1: Analyze failure in Step3
Since Step3 failed, the Saga must rollback prior successful steps.Step 2: Compensate previous steps
Compensating events for Step2 and Step1 should be triggered in reverse order to undo their effects.Final Answer:
Trigger compensating events for Step2 and Step1 in reverse order -> Option DQuick Check:
Rollback previous steps on failure [OK]
Quick Trick: Rollback previous steps in reverse order on failure [OK]
Common Mistakes:
- Ignoring failure and continuing
- Retrying indefinitely without limit
- Publishing success despite failure
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