Given a Kafka topic with retention.ms=60000 and segment.bytes=1048576, what happens when messages exceed 1 MB before 60 seconds?

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Kafka - Topics and Partitions

Given a Kafka topic with retention.ms=60000 and segment.bytes=1048576, what happens when messages exceed 1 MB before 60 seconds?

ARetention time overrides segment size, so no rollover occurs

BMessages are deleted immediately after 1 MB is reached

CKafka rolls over to a new segment file before retention time expires

DKafka increases segment size automatically to hold more messages

Step-by-Step Solution

Solution:

Step 1: Understand segment.bytes behavior
When segment size reaches the configured limit, Kafka rolls over to a new segment file regardless of retention time.
Step 2: Clarify retention.ms role
Retention time controls how long segments are kept, but does not prevent segment rollover due to size.
Final Answer:
Kafka rolls over to a new segment file before retention time expires -> Option C
Quick Check:
segment.bytes triggers rollover before retention.ms expires [OK]

Quick Trick: Segment size triggers rollover, retention.ms controls deletion [OK]

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