Kafka - Consumer Groups
Given a consumer group with 2 consumers and 4 partitions, if one consumer leaves, how many partitions will the remaining consumer consume after rebalance?
Given a consumer group with 2 consumers and 4 partitions, if one consumer leaves, how many partitions will the remaining consumer consume after rebalance?
medium📝 Predict Output Q4 of 15
Step-by-Step Solution
Solution:
Step 1: Understand partition assignment before rebalance
With 2 consumers and 4 partitions, each consumer likely has 2 partitions.Step 2: Analyze effect of one consumer leaving
After one consumer leaves, the remaining consumer must consume all 4 partitions.Final Answer:
4 partitions -> Option AQuick Check:
Partitions after consumer leaves = all assigned to remaining consumer [OK]
Quick Trick: Remaining consumer takes all partitions after rebalance [OK]
Common Mistakes:
- Assuming partitions are evenly split without rebalance
- Thinking partitions are lost when consumer leaves
- Believing partitions remain unassigned
Master "Consumer Groups" in Kafka
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