[Solved] You configured Kafka with SASL_PLAINTEXT but forgot to set sasl.jaas.config. What will happen? — Ans: Kafka will reject connections due to missing credentials | Kafka

Kafka - Security

You configured Kafka with SASL_PLAINTEXT but forgot to set sasl.jaas.config. What will happen?

AKafka will allow connections without authentication

BKafka will reject connections due to missing credentials

CKafka will encrypt data automatically

DKafka will crash immediately

Step-by-Step Solution

Solution:

Step 1: Understand SASL_PLAINTEXT usage
SASL_PLAINTEXT requires authentication but does not encrypt data.
Step 2: Effect of missing sasl.jaas.config
This config provides credentials. Without it, Kafka cannot authenticate clients and will reject connections.
Final Answer:
Kafka will reject connections due to missing credentials -> Option B
Quick Check:
Missing credentials = connection rejected [OK]

Quick Trick: Missing auth config blocks connections [OK]

Common Mistakes:

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You configured Kafka with SASL_PLAINTEXT but forgot to set sasl.jaas.config. What will happen?