Kafka “Login module not specified in JAAS config”

There are 2 ways to provide the JAAS configuration to the Kafka clients.

• Via the client property: sasl.jaas.config. In that case you set it to the actual JAAS configuration entry. For example, your configuration file becomes:

  bootstrap.servers=(address)
  zookeeper.connect=127.0.0.1:2181
  zookeeper.connection.timeout.ms=6000
  sasl.jaas.config=org.apache.kafka.common.security.plain.PlainLoginModule required username="(username)" password="(password)";
  security.protocol=SASL_PLAINTEXT
  sasl.mechanism=PLAIN
  group.id=(group)
  

  As you’ve already figured out, you can use --command-config to pass a properties file to kafka-consumer-groups.sh.

• Via the Java property: java.security.auth.login.config. In this case, you set it to the path of your JAAS file. Also if you set it in KAFKA_OPTS, kafka-consumer-groups.sh will pick it up automatically.

  export KAFKA_OPTS="-Djava.security.auth.login.config=(path)/consumer_jaas.conf"