Given the following Kafka consumer code snippet, what will happen when two consumers with the same group.id subscribe to the same topic with 4 partitions?

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Kafka - Consumer Groups

Given the following Kafka consumer code snippet, what will happen when two consumers with the same group.id subscribe to the same topic with 4 partitions?

consumer1 = KafkaConsumer('my-topic', group_id='group1')
consumer2 = KafkaConsumer('my-topic', group_id='group1')

AEach consumer will receive all messages from all partitions.

BOnly one consumer will receive messages; the other will be idle.

CThe consumers will share the partitions so each gets a subset of messages.

DThe consumers will cause a conflict and fail to consume.

Step-by-Step Solution

Solution:

Step 1: Understand consumer group behavior
Consumers in the same group share partitions so that each partition is consumed by only one consumer.
Step 2: Apply to given scenario
With 4 partitions and 2 consumers in the same group, partitions will be divided between them, each getting a subset.
Final Answer:
The consumers will share the partitions so each gets a subset of messages. -> Option C
Quick Check:
Same group.id means partition sharing [OK]

Quick Trick: Same group.id consumers share partitions, not duplicate messages [OK]

Common Mistakes:

Thinking each consumer gets all messages
Assuming conflict causes failure
Believing only one consumer works

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More Kafka Quizzes

Given the following Kafka consumer code snippet, what will happen when two consumers with the same group.id subscribe to the same topic with 4 partitions?

Step 1: Understand consumer group behavior

Step 2: Apply to given scenario

Final Answer:

Quick Check:

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