[Solved] You have this Kafka client config:props.put("security.protocol", "SASL_PLAINTEXT"); props.put("sasl.mechanism", "PLAIN"); props.put("sasl.jaas.config", "org.apache.... What is the most likely cause? | Kafka

Kafka - Security

You have this Kafka client config:

props.put("security.protocol", "SASL_PLAINTEXT");
props.put("sasl.mechanism", "PLAIN");
props.put("sasl.jaas.config", "org.apache.kafka.common.security.plain.PlainLoginModule required username=\"admin\" password=\"admin123\";");

The client fails to authenticate. What is the most likely cause?

ABroker does not support SASL_PLAINTEXT

BIncorrect sasl.mechanism value

CWrong format in sasl.jaas.config string

DMissing SSL configuration causes failure

Step-by-Step Solution

Solution:

Step 1: Check security.protocol compatibility
SASL_PLAINTEXT means SASL without encryption. Many brokers disable this for security reasons.
Step 2: Consider broker support
If the broker is configured to reject SASL_PLAINTEXT connections, authentication will fail even if credentials and mechanism are correct.
Final Answer:
Broker does not support SASL_PLAINTEXT -> Option A
Quick Check:
Broker must allow SASL_PLAINTEXT [OK]

Quick Trick: Check if broker allows SASL_PLAINTEXT connections [OK]

Common Mistakes:

MISTAKES

Assuming SSL is required for SASL_PLAINTEXT
Misformatting sasl.jaas.config string
Using wrong sasl.mechanism value

Master "Security" in Kafka

9 interactive learning modes - each teaches the same concept differently

Learn Why Deep Visual Try Challenge Project Recall Time

More Kafka Quizzes

You have this Kafka client config:

Step 1: Check security.protocol compatibility

Step 2: Consider broker support

Final Answer:

Quick Check:

Want More Practice?