Kafka的java客户端连接出现Connection refused: no further information

在正常配置zookeeper和kafka后，编写测试代码发现报错了：

java.net.ConnectException: Connection refused: no further information
	at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
	at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
	at org.apache.kafka.common.network.PlaintextTransportLayer.finishConnect(PlaintextTransportLayer.java:50)
	at org.apache.kafka.common.network.KafkaChannel.finishConnect(KafkaChannel.java:216)
	at org.apache.kafka.common.network.Selector.pollSelectionKeys(Selector.java:531)
	at org.apache.kafka.common.network.Selector.poll(Selector.java:483)
	at org.apache.kafka.clients.NetworkClient.poll(NetworkClient.java:539)
	at org.apache.kafka.clients.producer.internals.Sender.runOnce(Sender.java:335)
	at org.apache.kafka.clients.producer.internals.Sender.run(Sender.java:244)
	at java.lang.Thread.run(Thread.java:748)
20:12:34.033 [kafka-producer-network-thread | producer-1] DEBUG org.apache.kafka.clients.NetworkClient - [Producer clientId=producer-1] Node -1 disconnected.

在网上搜到相关教程，说是修改 /config/server.properties 文件，添加下面这条语句即可

host.name=192.168.137.199

一番操作，报错依旧，终于定位了问题，同样是修改 /config/server.properties ，但是问题点在于

listeners=PLAINTEXT://localhost:9092

将localhost修改为kafka当前的操作系统的地址即可（如果当前java代码所在的操作系统与kafka一致则不需要）。