kafka调试中遇到Connection to node -1 could not be established. Broker may not be available.
kafka报错内容：
WARN [Consumer clientId=consumer-1, groupId=console-consumer-950] Connection to node -1 could not be established. Broker may not be available.
这是因为你的配置文件中的PLAINTEXT跟你请求的内容不同。举例来说，我在配置文件里配置的listeners=PLAINTEXT://10.127.96.151:9092，但是我想测试的时候请求的是./kafka-console-consumer.sh --bootstrap-server localhost:9092 --topic topic1 --from-beginning
正确的应该是./kafka-console-consumer.sh --bootstrap-server 10.127.96.151:9092 --topic topic1 --from-beginning
