Kafka consumer不能从eclipse中工作

Question

Kafka 0.8.2.2.3和zookeper都运行在VM中。我能够分别使用kafka-console-producer.sh和kafka-console-conducer.sh成功地在VM中运行producer和consumer。甚至我也能够使用kafka-console-consumer.sh从主机上使用Kafka消息。但当我试图从eclipse使用java运行消费者时，zookeeper会记录以下错误

2015-06-26 03:06:26,323 - INFO  [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:NIOServerCnxn@1007] - Closed socket connection for client /192.168.1.12:59549 (no session established for client)
2015-06-26 03:07:26,225 - INFO  [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:NIOServerCnxnFactory@197] - Accepted socket connection from /192.168.1.12:59617
2015-06-26 03:07:26,226 - WARN  [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:NIOServerCnxn@357] - caught end of stream exception
EndOfStreamException: Unable to read additional data from client sessionid 0x0, likely client has closed socket
    at org.apache.zookeeper.server.NIOServerCnxn.doIO(NIOServerCnxn.java:228)
    at org.apache.zookeeper.server.NIOServerCnxnFactory.run(NIOServerCnxnFactory.java:208)
    at java.lang.Thread.run(Thread.java:745)

下面是我的Kafka消费代码

package com.truckevent.producer;


import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Properties;

import kafka.consumer.Consumer;
import kafka.consumer.ConsumerConfig;
import kafka.consumer.ConsumerIterator;
import kafka.consumer.KafkaStream;
import kafka.javaapi.consumer.ConsumerConnector;


public class KafkaConsumer {

    public static void main(String[] args) throws Exception {

        String group = "hello" ;


        Properties props = new Properties();
        props.put("zookeeper.connect", "192.168.1.12:2181");
        props.put("group.id", group);
        props.put("zookeeper.session.timeout.ms", "20000");
        props.put("zookeeper.sync.time.ms", "2030");
        props.put("auto.commit.interval.ms", "10000");
        props.put("auto.offset.reset", "smallest");

        ConsumerConfig cf = new ConsumerConfig(props) ;

        ConsumerConnector consumer = Consumer.createJavaConsumerConnector(cf) ;

        String topic = "event" ;

        Map<String, Integer> topicCountMap = new HashMap<String, Integer>();
        topicCountMap.put(topic, new Integer(1));
        Map<String, List<KafkaStream<byte[], byte[]>>> consumerMap = consumer.createMessageStreams(topicCountMap);
        List<KafkaStream<byte[], byte[]>> streams = consumerMap.get(topic);


        KafkaStream<byte[],byte[]> stream = streams.get(0) ;

        ConsumerIterator<byte[], byte[]> it = stream.iterator();
        int i = 1 ;
        while (it.hasNext()) {

            System.out.println(i + ": " + new String(it.next().message()));
            ++i;
        }
        consumer.shutdown(); 
    }
}

我不确定为什么我不能使用来自java代码的消息。Kafka运行在端口6667上，zookeeper运行在端口2181上。

Answer 1

• 请检查zookeeper是否绑定（netstat-lntp）到0.0.0.0或只绑定到localhost（然后它将只接受来自vm本身的连接），这是一个相当新的选项(clientPortBindAddress，检查是否指定了它，默认情况下，如果没有指定它，它绑定到所有地址）
• 它可能连接到您的vm配置。例如，在我使用Vagrant+Virtual box的情况下，我使用config.vm.network:private_network，ip:192.168.1.12
在主机和客户机之间创建专用网络
• 另外-检查您的使用者主服务器是否未抛出某个异常，它可能已连接，并将提供一些附加信息（您正在将异常抛出到当前的最高级别）