往kafka集群发送消息时，报错如下：

page_visits-1: 30005 ms has passed since batch creation plus linger time

加入log4j.properties，设置为DEBUG级别，错误如下：

2017-06-03 17:33:31,417 DEBUG [org.apache.kafka.clients.NetworkClient] - Error connecting to node 2 at kafka-cluster-64bit:9094:
java.io.IOException: Can‘t resolve address: kafka-cluster-64bit:9094
    at org.apache.kafka.common.network.Selector.connect(Selector.java:182)
    at org.apache.kafka.clients.NetworkClient.initiateConnect(NetworkClient.java:629)
    at org.apache.kafka.clients.NetworkClient.ready(NetworkClient.java:186)
    at org.apache.kafka.clients.producer.internals.Sender.run(Sender.java:184)
    at org.apache.kafka.clients.producer.internals.Sender.run(Sender.java:126)
    at java.lang.Thread.run(Thread.java:745)
Caused by: java.nio.channels.UnresolvedAddressException
    at sun.nio.ch.Net.checkAddress(Net.java:101)
    at sun.nio.ch.SocketChannelImpl.connect(SocketChannelImpl.java:622)
    at org.apache.kafka.common.network.Selector.connect(Selector.java:179)
    ... 5 more

解决办法：

config/server.properties修改

修改前：listeners=PLAINTEXT://:9092

修改后：listeners=PLAINTEXT://192.168.137.176:9092

具体代码参照：Kafka JAVA客户端代码示例

Java客户端连接kafka集群报错