kafka 3.4.0 sasl_PLAINTEXT kafka-metadata-quorum.sh Unexpected Kafka request of type METADATA during SASL handshake

[Yj Jia]

<https://stackoverflow.com/posts/76369835/timeline>

kafka 3.4.0 sasl_PLAINTEXT exec kafka-metadata-quorum.sh Unexpected Kafka
request of type METADATA during SASL handshake.

1、kafka 3.4.0 config broker sasl_PLAINTEXT,

./kafka-metadata-quorum.sh --bootstrap-server 192.168.3.138:9092
--command-config kafka_server_config.conf describe --status

kafkalog stdout :

[2023-05-30 16:21:36,542] INFO [SocketServer listenerType=BROKER,
nodeId=2] Failed authentication with /192.168.3.138
(channelId=192.168.3.139:9092-192.168.3.138:36074-41) (Unexpected
Kafka request of type METADATA during SASL handshake.)
(org.apache.kafka.common.network.Selector)

2、kafka server server.properties config

process.roles=broker,controllernode.id=1
controller.quorum.voters=1@192.168.3.138:9093,2@192.168.3.139:9093,3@192.168.3.140:9093
listeners=BROKER://:9092,CONTROLLER://:9093inter.broker.listener.name=BROKER
controller.listener.names=CONTROLLER
listener.security.protocol.map=BROKER:SASL_PLAINTEXT,CONTROLLER:PLAINTEXT
sasl.mechanism.inter.broker.protocol=PLAIN
sasl.enabled.mechanisms=PLAIN

3、kafka_server_jaas.conf config

broker.KafkaServer {
    org.apache.kafka.common.security.plain.PlainLoginModule required
    username="admin"
    password="admin-secret"
    user_admin="admin-secret"
    user_alice="alice-secret";
};

4、kafka_server_config.conf config

sasl.jaas.config=org.apache.kafka.common.security.plain.PlainLoginModule
required \
    username="admin" \
    password="admin-secret";
security.protocol=SASL_PLAINTEXT
sasl.mechanism=PLAIN

5、 use kafka_server_config.conf create topic or descirbe topic info

[root@opensource01 kafka_2.13-3.4.0]# bin/kafka-topics.sh --describe
--topic enmotech  --bootstrap-server 192.168.3.138:9092
--command-config kafka_server_config.conf
Topic: enmotech    TopicId: ZXVFSBuUT7e_xYWKk4rV9A    PartitionCount:
5    ReplicationFactor: 3    Configs: segment.bytes=1073741824
    Topic: enmotech    Partition: 0    Leader: 3    Replicas: 3,1,2
Isr: 3,1,2
    Topic: enmotech    Partition: 1    Leader: 1    Replicas: 1,2,3
Isr: 3,1,2
    Topic: enmotech    Partition: 2    Leader: 2    Replicas: 2,3,1
Isr: 3,1,2
    Topic: enmotech    Partition: 3    Leader: 3    Replicas: 3,1,2
Isr: 3,1,2
    Topic: enmotech    Partition: 4    Leader: 1    Replicas: 1,2,3
Isr: 3,1,2

PS： don't enable sasl_plaintext ,exec kafka-metadata-quorum.sh,the output
is :

[root@opensource02 bin]# ./kafka-metadata-quorum.sh
--bootstrap-server 192.168.3.139:9092  describe --replication
NodeId    LogEndOffset    Lag    LastFetchTimestamp
LastCaughtUpTimestamp    Status
1         96191           0      1685433493877         1685433493877
         Leader
2         96191           0      1685433493482         1685433493482
         Follower
3         96191           0      1685433493474         1685433493474
         Follower



how can i fix this problem