Given a Kafka topic with 3 partitions, if messages with keys "key1", "key2", and "key1" are sent in that order, which partition will the second "key1" message go to?

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Kafka - Topics and Partitions

Given a Kafka topic with 3 partitions, if messages with keys "key1", "key2", and "key1" are sent in that order, which partition will the second "key1" message go to?

APartition 1

BSame partition as the first <code>"key1"</code> message

CPartition 0

DA random partition different from the first <code>"key1"</code> message

Step-by-Step Solution

Solution:

Step 1: Understand key-based partitioning
Kafka uses the message key to decide the partition. Messages with the same key always go to the same partition.
Step 2: Apply to the given keys
Since both messages have key "key1", the second message will go to the same partition as the first "key1" message.
Final Answer:
Same partition as the first "key1" message -> Option B
Quick Check:
Same key = same partition [OK]

Quick Trick: Same keys always go to the same partition [OK]

Common Mistakes:

Assuming keys distribute randomly each time
Thinking second message goes to a different partition
Ignoring key-based partitioning

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More Kafka Quizzes

Given a Kafka topic with 3 partitions, if messages with keys "key1", "key2", and "key1" are sent in that order, which partition will the second "key1" message go to?

Step 1: Understand key-based partitioning

Step 2: Apply to the given keys

Final Answer:

Quick Check:

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