SpringBoot整合kafka报could not be established. Broker may not be available.

报错日志

[AdminClient clientId=adminclient-1] Connection to node 0 (localhost/127.0.0.1:9092) could not be established. Broker may not be available.
[AdminClient clientId=adminclient-1] Connection to node 0 (localhost/127 .0.0.1:9092) could not be established. Broker may not be available.
[AdminClient client Id=adminclient-1] Connection to node 0 (localhost/127 .0.0.1:9092) could not be established. Broker may not be available.
[AdminClient clientId= adminclient-1] Connection to node 0 (localhost/127 .0.0.1:9092) could not be established. Broker may not be available.
[AdminClient clientId=adminclient-1] Connection to node 0 (localhost/127 .0.0.1:9092) could not be established. Broker may not be available.
[AdminClient client Id=adminclient-1] Connection to node 0 (localhost/127 .0.0.1:9092) could not be established. Broker may not be available.
[ AdminClient client Id-adminclient-1] Connection to node 0 (localhost/127 .0.0.1:9092) could not be established. Broker may not be available.
[AdminClient client Id=adminclient-1] Connection to node 0 (localhost/127 .0.0.1:9092) could not be established. Broker may not be available.

解决，修改kafka的server.properties

listeners=PLAINTEXT://kafka-host:9092
advertised.listeners=PLAINTEXT://kafka-host:9092

例如：