肯定是楼主配置文件中或则代码中
//group 代表一个消费组
props.put("group.id", "jd-group");
下面是一个示例
消费者代码
package com.fengtang;
import kafka.consumer.ConsumerConfig;
import kafka.consumer.ConsumerIterator;
import kafka.consumer.KafkaStream;
import kafka.javaapi.consumer.ConsumerConnector;
import kafka.serializer.StringDecoder;
import kafka.utils.VerifiableProperties;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Properties;
/**
* Create by fengtang
* KafkaDemo_01
*/
public class KafkaConsumer {
private final ConsumerConnector consumer;
private KafkaConsumer() {
Properties props = new Properties();
/**
* zookeeper 配置
*/
props.put("zookeeper.connect", "192.168.1.116:2182");
/**
* group 代表一个消费组
*/
props.put("group.id", "jd-group");
/**
* zk连接超时
*/
props.put("zookeeper.session.timeout.ms", "400000");
props.put("zookeeper.sync.time.ms", "200");
props.put("auto.commit.interval.ms", "1000");
props.put("auto.offset.reset", "smallest");
/**
* 序列化类
*/
props.put("serializer.class", "kafka.serializer.StringEncoder");
ConsumerConfig config = new ConsumerConfig(props);
consumer = kafka.consumer.Consumer.createJavaConsumerConnector(config);
}
void consume() {
Map<String, Integer> topicCountMap = new HashMap<String, Integer>();
topicCountMap.put(KafkaProducer.TOPIC, new Integer(1));
StringDecoder keyDecoder = new StringDecoder(new VerifiableProperties());
StringDecoder valueDecoder = new StringDecoder(new VerifiableProperties());
Map<String, List<KafkaStream<String, String>>> consumerMap =
consumer.createMessageStreams(topicCountMap, keyDecoder, valueDecoder);
KafkaStream<String, String> stream = consumerMap.get(KafkaProducer.TOPIC).get(0);
ConsumerIterator<String, String> it = stream.iterator();
while (it.hasNext())
System.out.println(it.next().message());
}
public static void main(String[] args) {
new KafkaConsumer().consume();
}
}
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