[Solved] If a Kafka event sourcing consumer crashes and restarts, how does it recover its state? — Ans: By replaying all events from the beginning of the event log | Kafka

Kafka - Event-Driven Architecture

If a Kafka event sourcing consumer crashes and restarts, how does it recover its state?

ABy loading the last snapshot only without events

BBy replaying all events from the beginning of the event log

CBy requesting state from another consumer

DBy ignoring past events and starting fresh

Step-by-Step Solution

Solution:

Step 1: Understand recovery in event sourcing
Consumers rebuild state by replaying all events from the event log.
Step 2: Evaluate options
Only By replaying all events from the beginning of the event log describes replaying events for recovery; others are incorrect.
Final Answer:
By replaying all events from the beginning of the event log -> Option B
Quick Check:
Recovery = replay events [OK]

Quick Trick: Replay events from start to rebuild state after crash [OK]

Common Mistakes:

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If a Kafka event sourcing consumer crashes and restarts, how does it recover its state?