【发布时间】:2019-02-17 02:39:27
【问题描述】:
我将 Kafka 客户端生产者写为:
public class BasicProducerExample {
public static void main(String[] args){
Properties props = new Properties();
props.put(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG, "127.0.0.1:9092");
props.put(ProducerConfig.ACKS_CONFIG, "all");
props.put(ProducerConfig.RETRIES_CONFIG, 0);
props.put(ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG, "org.apache.kafka.common.serialization.StringSerializer");
props.put(ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG, "org.apache.kafka.common.serialization.StringSerializer");
//props.put(ProducerConfig.
props.put("batch.size","16384");// maximum size of message
Producer<String, String> producer = new KafkaProducer<String, String>(props);
TestCallback callback = new TestCallback();
Random rnd = new Random();
for (long i = 0; i < 2 ; i++) {
//ProducerRecord<String, String> data = new ProducerRecord<String, String>("dke", "key-" + i, "message-"+i );
//Topci and Message
ProducerRecord<String, String> data = new ProducerRecord<String, String>("dke", ""+i);
producer.send(data, callback);
}
producer.close();
}
private static class TestCallback implements Callback {
@Override
public void onCompletion(RecordMetadata recordMetadata, Exception e) {
if (e != null) {
System.out.println("Error while producing message to topic :" + recordMetadata);
e.printStackTrace();
} else {
String message = String.format("sent message to topic:%s partition:%s offset:%s", recordMetadata.topic(), recordMetadata.partition(), recordMetadata.offset());
System.out.println(message);
}
}
}
}
输出: 向主题生成消息时出错:null org.apache.kafka.common.errors.TimeoutException: 60000 毫秒后更新元数据失败。
注意: 代理端口:localhost:6667 正在工作。
【问题讨论】:
-
你是怎么解决这个问题的?
标签: apache-kafka hortonworks-sandbox