kafka报错Broker may not be available.

现象

[root@kafka-3 bin]# ./kafka-console-producer.sh --broker-list localhost:9092 --topic test
>sdssd
[2018-03-20 17:58:01,409] WARN [Producer clientId=console-producer] Connection to node -1 could not be established. Broker may not be available. (org.apache.kafka.clients.NetworkClient)
[2018-03-20 17:58:01,461] WARN [Producer clientId=console-producer] Connection to node -1 could not be established. Broker may not be available. (org.apache.kafka.clients.NetworkClient)
[2018-03-20 17:58:01,571] WARN [Producer clientId=console-producer] Connection to node -1 could not be established. Broker may not be available. (org.apache.kafka.clients.NetworkClient)

解决方法：

将localhost改成PLAINTEXT配置的地址即可，估计localhost没配置，kafka不认。