You have set log.retention.hours=168 in your Kafka broker config, but logs are not retained for 7 days as expected. What is a likely cause?

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Kafka - with Java/Python

You have set log.retention.hours=168 in your Kafka broker config, but logs are not retained for 7 days as expected. What is a likely cause?

AThe <code>log.retention.hours</code> value must be set in minutes

BThe <code>log.retention.bytes</code> setting is limiting retention by size

CKafka does not support retention configuration

DThe broker needs to be restarted for changes to take effect

Step-by-Step Solution

Solution:

Step 1: Understand retention config interaction
Kafka retention can be limited by time or size; size limit can override time.
Step 2: Analyze options
The log.retention.bytes setting is limiting retention by size correctly identifies size limit as a possible cause.
Final Answer:
The log.retention.bytes setting is limiting retention by size -> Option B
Quick Check:
Retention limited by size overrides time [OK]

Quick Trick: Check size limits when time-based retention seems ignored [OK]

Common Mistakes:

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