Kafka - Topics and Partitions
A Kafka consumer reads messages from a topic but sees duplicates. What could be a reason related to topic organization?
A Kafka consumer reads messages from a topic but sees duplicates. What could be a reason related to topic organization?
medium📝 Debug Q7 of 15
Step-by-Step Solution
Solution:
Step 1: Understand partition and offset role
Kafka topics with multiple partitions require consumers to commit offsets to avoid duplicates.Step 2: Identify cause of duplicates
If offsets are not committed, consumers may re-read messages causing duplicates.Final Answer:
The topic has multiple partitions and consumer offsets are not committed -> Option CQuick Check:
Duplicates cause = Uncommitted offsets in multi-partition topic [OK]
Quick Trick: Commit offsets to avoid duplicates in multi-partition topics [OK]
Common Mistakes:
- Blaming misspelled topic name
- Assuming encryption causes duplicates
- Ignoring offset management
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