Kafka - Topics and Partitions
You have a Kafka topic with 2 partitions but your consumer only reads from partition 0. What is the likely problem?
You have a Kafka topic with 2 partitions but your consumer only reads from partition 0. What is the likely problem?
medium📝 Debug Q14 of 15
Step-by-Step Solution
Solution:
Step 1: Analyze consumer subscription behavior
If a consumer reads only from partition 0, it likely subscribed only to that partition explicitly.Step 2: Check topic partition count and producer behavior
The topic has 2 partitions, so consumer should subscribe to both to read all messages.Final Answer:
The consumer is not configured to subscribe to all partitions -> Option DQuick Check:
Consumer subscription controls partitions read = C [OK]
Quick Trick: Consumer must subscribe to all partitions to read all messages [OK]
Common Mistakes:
- Assuming topic has only one partition
- Believing Kafka does not support multiple partitions
- Thinking producer controls consumer reading partitions
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