Did you start the consumer before the producer? Be default, the consumer
gets only the new data?
Thanks,
Jun
On Mon, Jul 8, 2013 at 2:53 PM, Scott Wang <
scott.w...@rumbleentertainment.com> wrote:
> I am testing with Kafka 0.8 beta and having problem of receiving message in
> consumer. There is no error so does anyone have any insights. When I
> commented out the "compression.code" everything works fine.
>
> My producer:
> public class TestKafka08Prod {
>
> public static void main(String [] args) {
>
> Producer<Integer, String> producer = null;
> try {
> Properties props = new Properties();
> props.put("metadata.broker.list", "localhost:9092");
> props.put("serializer.class",
> "kafka.serializer.StringEncoder");
> props.put("producer.type", "sync");
> props.put("request.required.acks","1");
> props.put("compression.codec", "gzip");
> ProducerConfig config = new ProducerConfig(props);
> producer = new Producer<Integer, String>(config);
> int j=0;
> for(int i=0; i<10; i++) {
> KeyedMessage<Integer, String> data = new
> KeyedMessage<Integer, String>("test-topic", "test-message: "+i+"
> "+System.currentTimeMillis());
> producer.send(data);
>
> }
>
> } catch (Exception e) {
> System.out.println("Error happened: ");
> e.printStackTrace();
> } finally {
> if(null != null) {
> producer.close();
> }
>
> System.out.println("Ened of Sending");
> }
>
> System.exit(0);
> }
> }
>
>
> My consumer:
>
> public class TestKafka08Consumer {
> public static void main(String [] args) throws UnknownHostException,
> SocketException {
>
> Properties props = new Properties();
> props.put("zookeeper.connect", "localhost:2181/kafka_0_8");
> props.put("group.id", "test08ConsumerId");
> props.put("zk.sessiontimeout.ms", "4000");
> props.put("zk.synctime.ms", "2000");
> props.put("autocommit.interval.ms", "1000");
>
> ConsumerConfig consumerConfig = new ConsumerConfig(props);
>
> ConsumerConnector consumerConnector =
> kafka.consumer.Consumer.createJavaConsumerConnector(consumerConfig);
>
> String topic = "test-topic";
> Map<String, Integer> topicCountMap = new HashMap<String,
> Integer>();
> topicCountMap.put(topic, new Integer(1));
> Map<String, List<KafkaStream<byte[], byte[]>>> consumerMap =
> consumerConnector.createMessageStreams(topicCountMap);
> KafkaStream<byte[], byte[]> stream =
> consumerMap.get(topic).get(0);
>
> ConsumerIterator<byte[], byte[]> it = stream.iterator();
>
> int counter=0;
> while(it.hasNext()) {
> try {
> String fromPlatform = new String(it.next().message());
> System.out.println("The messages: "+fromPlatform);
> } catch(Exception e) {
> e.printStackTrace();
> }
> }
> System.out.println("SystemOut");
> }
> }
>
>
> Thanks
>
