WARN [Producer clientId=console-producer] Connection to node -1 could not be established.
WARN [Producer clientId=console-producer] Connection to node -1 could not be established. Broker may not be available. (org.apache.kafka.clients.NetworkClient)
kafka-console-producer.sh --broker-list localhost:9092 --topic shop
原因：命令行中的localhost应该是配置kafka时的地址，我配置的地址是192.168.161.136
解决：
kafka-console-producer.sh --broker-list 192.168.161.136:9092 --topic shop
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