This code sometimes gives me all the messages from the beginning and waiting for another message and sometimes it's just waiting for another message
import java.util.HashMap;import java.util.List;import java.util.Map;import java.util.Properties;import kafka.consumer.ConsumerConfig;import kafka.consumer.ConsumerIterator;import kafka.consumer.KafkaStream;import kafka.javaapi.consumer.ConsumerConnector;import kafka.message.MessageAndMetadata;public class TestConsumer{public static void main(String[] args) { ConsumerConfig config; Properties props = new Properties(); props.put("zookeeper.connect","sandbox.hortonworks.com:2181"); props.put("group.id", "group-4"); props.put("zookeeper.session.timeout.ms", "400"); props.put("zookeeper.sync.time.ms", "200"); props.put("auto.commit.interval.ms", "200"); config = new ConsumerConfig(props); ConsumerConnector consumer = kafka.consumer.Consumer.createJavaConsumerConnector (config); String topic = "News"; System.out.println("Running"); Run(consumer,topic); }public static void Run(ConsumerConnector consumer,String topic){ HashMap<String,Integer> topicCountMap = new HashMap<String,Integer>(); topicCountMap.put(topic, 1); Map<String,List<KafkaStream<byte[],byte[]>>> consumerMap = consumer.createMessageStreams(topicCountMap); KafkaStream<byte[],byte[]> stream = consumerMap.get(topic).get(0); ConsumerIterator<byte[],byte[]> it = stream.iterator(); List<String> msgTopicList = new ArrayList<String>(); int count = 0; System.out.println("Waiting"); while(it.hasNext()){ MessageAndMetadata<byte[],byte[]> msgAndData = it.next(); String msg = new String(msgAndData.message()); msgTopicList.add(msg); String key = "NoKey"; System.out.println(msg); count++; }}}What I have to do is get all the messages from the topic sent them to the user and count them
What is the best way to do this?
version kafka_2.10-0.8.1.2.2.4.2-2