[Solved] You have this Kafka CQRS code snippet:producer.send('commands', 'CreateOrder') consumer.subscribe(['commands', 'events'])What is the main problem here? | Kafka

Kafka - Event-Driven Architecture

You have this Kafka CQRS code snippet:

producer.send('commands', 'CreateOrder')
consumer.subscribe(['commands', 'events'])

What is the main problem here?

AConsumer should not subscribe to both 'commands' and 'events' topics

BProducer should send to 'events' topic, not 'commands'

CProducer must send JSON, not strings

DConsumer must subscribe only to 'commands' topic

Step-by-Step Solution

Solution:

Step 1: Understand CQRS topic roles
Commands topic is for writes; events topic is for read updates. Consumers usually subscribe to one role.
Step 2: Analyze consumer subscription
Subscribing to both commands and events mixes responsibilities and can cause confusion or errors.
Final Answer:
Consumer should not subscribe to both 'commands' and 'events' topics -> Option A
Quick Check:
Consumer subscribes to one topic type only [OK]

Quick Trick: Consumers should subscribe to either commands or events, not both [OK]

Common Mistakes:

MISTAKES

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