Kafka - Basics and Event Streaming
In Kafka, a consumer group has 4 consumers but the topic has only 2 partitions. What is the problem?
In Kafka, a consumer group has 4 consumers but the topic has only 2 partitions. What is the problem?
medium📝 Debug Q7 of 15
Step-by-Step Solution
Solution:
Step 1: Understand partition to consumer assignment
Each partition can be assigned to only one consumer in a group.Step 2: Analyze consumer count vs partitions
With 4 consumers and 2 partitions, only 2 consumers get partitions; 2 remain idle.Final Answer:
Two consumers will be idle without assigned partitions -> Option CQuick Check:
More consumers than partitions = idle consumers B [OK]
Quick Trick: Consumers > partitions means some consumers idle [OK]
Common Mistakes:
- Assuming Kafka auto-creates partitions
- Thinking consumers share partitions
- Expecting duplicate messages
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