kafka.common.FailedToSendMessageException: Failed to send messages after 3 tries.

　　今天在寫kafka生產者生成數據的程序並運行時，報如下錯誤：

log4j:WARN No appenders could be found for logger (kafka.utils.VerifiableProperties). 
log4j:WARN Please initialize the log4j system properly. 
kafka.common.FailedToSendMessageException: Failed to send messages after 3 tries. 
    at kafka.producer.async.DefaultEventHandler.handle(DefaultEventHandler.scala:90) 
    at kafka.producer.Producer.send(Producer.scala:76) 
    at kafka.javaapi.producer.Producer.send(Producer.scala:33) 
    at ProducerTest.main(TestProducer.java:21)

問題解決方案：

1.檢查目錄：C:\Windows\System32\drivers\etc下的hosts文件，看IP地址與主機名是否配置正確。經常，發現沒有正確配置，修改后再運行，正常。

192.168.2.212 hadoop01
192.168.2.224 hadoop02
192.168.2.226 hadoop03

2.把config文件夾下的server.properties文件里#host.name=localhost的注釋去掉,然后運行

3.把config文件夾下的server.properties中的以下兩個屬性

zookeeper.connect=localhost:2181改成zookeeper.connect=192.168.2.212:2181  

以及默認注釋掉的 

#host.name=localhost改成host.name=192.168.2.212

 

樓主用的是第一種方案

---------------------------------生產者代碼如下-----------------------------------------------------

import java.util.*;

import kafka.javaapi.producer.Producer;
import kafka.producer.KeyedMessage;
import kafka.producer.ProducerConfig;
 
public class ProducerDemo3 {
    public static void main(String[] args) {
        long events = 400;
        Random rnd = new Random();
 
        Properties props = new Properties();
        props.put("metadata.broker.list", "192.168.2.212:9092,192.168.224:9092,192.168.226:9092");
        props.put("serializer.class", "kafka.serializer.StringEncoder");
        props.put("partitioner.class", "com.vrv.kafka.SimplePartitioner");
        props.put("request.required.acks", "1");
 
        ProducerConfig config = new ProducerConfig(props);
 
        Producer<String, String> producer = new Producer<String, String>(config);
        long start=System.currentTimeMillis();
        for (long nEvents = 0; nEvents < events; nEvents++) { 
               String ip1 = "192.168.2." + rnd.nextInt(255); 
               String ip2 = "192.168.2." + rnd.nextInt(255); 
               String ip3 = "192.168.2." + rnd.nextInt(255); 
               String msg = ip1 + "    " + ip2 + "    " + ip3 ; 
               KeyedMessage<String, String> data = new KeyedMessage<String, String>("test", ip1, msg);
               producer.send(data);
        }
        producer.close();
        System.out.println("耗時:" + (System.currentTimeMillis() - start)/1000);
    }
}