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What is the main role of the group coordinator in Kafka consumer groups?

easy📝 Conceptual Q11 of 15
Kafka - Consumer Groups
What is the main role of the group coordinator in Kafka consumer groups?
AIt manages the membership and partition assignments of consumers in a group.
BIt stores all messages produced to Kafka topics.
CIt handles the replication of Kafka brokers.
DIt monitors the health of Kafka brokers.
Step-by-Step Solution
Solution:

  1. Step 1: Understand the group coordinator's function

    The group coordinator is responsible for managing consumer group membership and partition assignments.

  2. Step 2: Differentiate from other Kafka components

    Storing messages, replication, and broker health are handled by other Kafka components, not the group coordinator.

  3. Final Answer:

    It manages the membership and partition assignments of consumers in a group. -> Option A

  4. Quick Check:

    Group coordinator = manages consumer group membership [OK]
Quick Trick: Group coordinator manages consumers, not brokers or data storage [OK]
Common Mistakes:
  • Confusing group coordinator with Kafka broker
  • Thinking it stores messages
  • Mixing it with replication controller

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