Kafka - Message Delivery Semantics
Identify the error in this Kafka producer configuration for at-most-once delivery:
producer = KafkaProducer(acks=1, retries=0)
producer.send('topic', b'message')Identify the error in this Kafka producer configuration for at-most-once delivery:
medium📝 Debug Q14 of Q15
Step-by-Step Solution
Solution:
Step 1: Check acks setting
acks=1 means the producer waits for leader acknowledgment, allowing retries and possible duplicates, not at-most-once.Step 2: Verify retries and other settings
Retries=0 disables retries, but acks=1 still waits for confirmation, so this is not pure at-most-once.Final Answer:
acks=1 causes waiting for leader ack, not at-most-once -> Option AQuick Check:
acks must be 0 for at-most-once [OK]
Quick Trick: acks must be 0 for at-most-once delivery [OK]
Common Mistakes:
MISTAKES- Thinking retries=0 means no retries but ignoring acks effect
- Assuming idempotence is required for at-most-once
- Believing topic names must be uppercase
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