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A Kafka producer fails to send messages even though the topic exists. Which is a likely reason?

medium📝 Debug Q7 of 15
Kafka - Producers
A Kafka producer fails to send messages even though the topic exists. Which is a likely reason?
AThe topic has zero partitions
BProducer lacks proper authentication or authorization
CThe producer is using an unsupported Kafka version
DThe message size is smaller than the minimum allowed
Step-by-Step Solution
Solution:

  1. Step 1: Verify Topic Existence

    Topic exists, so the issue is likely permission related.

  2. Step 2: Check Security Settings

    Producers need proper ACLs to publish messages.

  3. Final Answer:

    Producer lacks proper authentication or authorization -> Option B

  4. Quick Check:

    Permissions prevent sending despite topic presence [OK]
Quick Trick: Check producer permissions if topic exists but send fails [OK]
Common Mistakes:
  • Assuming topic partitions can be zero
  • Blaming Kafka version without evidence
  • Thinking message size too small causes failure

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