The rule "same key goes to the same partition" is true unless...

The correct answer is C. the number of partition changes. Increasing the number of partition causes new messages keys to get hashed differently, and breaks the guarantee "same keys goes to the same partition". Kafka logs are immutable and the previous messages are not re-shuffled.

Developing Kafka Producers

Question

Options

Athe number of producer changes
Bthe number of kafka broker changes
Cthe number of partition changes
Dthe replication factor changes

How the community answered

(26 responses)

B
4% (1)
C
88% (23)
D
8% (2)

Explanation

Increasing the number of partition causes new messages keys to get hashed differently, and breaks the guarantee "same keys goes to the same partition". Kafka logs are immutable and the previous messages are not re-shuffled.

Topics

#partitioning#partition key#default partitioner#partition count

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