[Solved] You have configured your Kafka client as follows:props.put("security.protocol", "SASL_SSL"); props.put("sasl.mechanism", "SCRAM-SHA-256"); props.put("sasl.jaas.... What is the most likely cause? | Kafka

Kafka - Security

You have configured your Kafka client as follows:

props.put("security.protocol", "SASL_SSL");
props.put("sasl.mechanism", "SCRAM-SHA-256");
props.put("sasl.jaas.config", "org.apache.kafka.common.security.scram.ScramLoginModule required username=\"user1\" password=\"wrongpass\";");

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

AWrong 'security.protocol' value

BMissing 'ssl.truststore.location' property

CIncorrect password in sasl.jaas.config

DUnsupported SASL mechanism

Step-by-Step Solution

Solution:

Step 1: Analyze the configuration
The client uses SASL_SSL with SCRAM-SHA-256 and provides a username and password.
Step 2: Identify failure reason
Authentication failure usually indicates invalid credentials.
Step 3: Check other options
SSL properties missing would cause SSL handshake failure, not authentication failure. The protocol and mechanism are correct.
Final Answer:
Incorrect password in sasl.jaas.config -> Option C
Quick Check:
Authentication fails due to bad credentials [OK]

Quick Trick: Authentication failure usually means bad username/password [OK]

Common Mistakes:

Assuming SSL truststore missing causes auth failure
Confusing protocol and mechanism settings

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You have configured your Kafka client as follows:

Step 1: Analyze the configuration

Step 2: Identify failure reason

Step 3: Check other options

Final Answer:

Quick Check:

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