[Solved] A developer tries to decrease partitions from 3 to 2 on a Kafka topic. What is the expected result? — Ans: Kafka will throw an error because partition count cannot decrease | Kafka

Kafka - Performance Tuning

A developer tries to decrease partitions from 3 to 2 on a Kafka topic. What is the expected result?

AKafka will reduce partitions to 2 successfully

BKafka will ignore the request and keep 3 partitions

CKafka will throw an error because partition count cannot decrease

DKafka will merge partitions 2 and 3 into one

Step-by-Step Solution

Solution:

Step 1: Understand Kafka partition count rules
Kafka allows increasing partitions but not decreasing them.
Step 2: Effect of decreasing partition count
Attempting to reduce partitions causes an error.
Final Answer:
Kafka will throw an error because partition count cannot decrease -> Option C
Quick Check:
Partition count can only increase [OK]

Quick Trick: Partition count can only increase, not decrease [OK]

Common Mistakes:

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A developer tries to decrease partitions from 3 to 2 on a Kafka topic. What is the expected result?