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CCAAK · Question #28
CCAAK Question #28: Real Exam Question with Answer & Explanation
The correct answer is C. The offsets for the messages on the source AND destination cluster may not match.. MirrorMaker preserves message order but not offsets. Each cluster maintains its own offset sequence, so the same logical message will not have the same offset on both the source and DR
Question
You have a mission-critical Kafka cluster that must be highly available. A Disaster Recovery (DR) cluster is using MirrorMaker and data is continuously replicated from the source cluster to the DR cluster. You notice that the message on offset 1002 on the source cluster does not match with the message on offset 1002 on the destination DR cluster. Which statement is correct?
Options
- AThe DR cluster is lagging behind updates; once the DR cluster catches up, the messages will
- BThe message on the DR cluster was accidently over-written by another application.
- CThe offsets for the messages on the source AND destination cluster may not match.
- DThe message was updated on the source cluster, but the update did not flow into the destination
Explanation
MirrorMaker preserves message order but not offsets. Each cluster maintains its own offset sequence, so the same logical message will not have the same offset on both the source and DR
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