Question

我正在使用Kafka，Play和Scala。这是我的代码，我想将消息发送到kafka服务器，主题名称是＆＃34; 测试主题＆＃34; 。虽然我没有看到我在主题中发送的消息，但我没有收到任何错误这里有什么不对吗

 import kafka.producer.ProducerConfig
    import java.util.Properties
    import kafka.producer.Producer
    import scala.util.Random
    import kafka.producer.Producer
    import kafka.producer.Producer
    import kafka.producer.Producer
    import kafka.producer.KeyedMessage
    import java.util.Date

    object KafkaProducerLocal extends App {

      sendMessage

      def sendMessage {

        val topicName = "test-topic"
        try {
          val rnd = new Random()
          val props = new Properties()
          props.put("metadata.broker.list", "localhost:9092") //kafka 
          props.put("zk.connect", "localhost:2181");  //zookeeper
          props.put("serializer.class", "kafka.serializer.StringEncoder")
          props.put("producer.type", "async")


          val config = new ProducerConfig(props)
          val producer = new Producer[String, String](config)
          val t = System.currentTimeMillis()
          for (nEvents <- Range(0, 10)) {
            val ip = "192.168.2." + rnd.nextInt(255);
            val data = new KeyedMessage[String, String](topicName, ip, "Swapnil Test Data" + nEvents);
            producer.send(data);
          }

          producer.close();
        } catch {
          case t: Throwable => t.printStackTrace()
        }
      }

    }

Answer 1

您的代码没有任何问题。

检查log4j属性以查看日志
您运行的是什么版本的kafka，它与您的客户端版本相同。
首先制作主题link
检查服务器是否正常工作以及主题是否已创建，您可以使用控制台生产者和消费者example发送和接收消息

申请日志

2016-04-19 01:12:34 INFO  kafka.utils.Logging$class:68 - Verifying properties
2016-04-19 01:12:34 INFO  kafka.utils.Logging$class:68 - Property metadata.broker.list is overridden to localhost:9092
2016-04-19 01:12:34 INFO  kafka.utils.Logging$class:68 - Property producer.type is overridden to async
2016-04-19 01:12:34 INFO  kafka.utils.Logging$class:68 - Property serializer.class is overridden to kafka.serializer.StringEncoder
2016-04-19 01:12:34 WARN  kafka.utils.Logging$class:83 - Property zk.connect is not valid
SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in [jar:file:/home/vishnu/.m2/repository/org/slf4j/slf4j-log4j12/1.7.12/slf4j-log4j12-1.7.12.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/home/vishnu/.m2/repository/ch/qos/logback/logback-classic/1.1.2/logback-classic-1.1.2.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
SLF4J: Actual binding is of type [org.slf4j.impl.Log4jLoggerFactory]
2016-04-19 01:12:34 INFO  kafka.utils.Logging$class:68 - Shutting down producer
2016-04-19 01:12:34 INFO  kafka.utils.Logging$class:68 - Begin shutting down ProducerSendThread
2016-04-19 01:12:34 INFO  kafka.utils.Logging$class:68 - Fetching metadata from broker id:0,host:localhost,port:9092 with correlation id 0 for 1 topic(s) Set(topic-test)
2016-04-19 01:12:34 INFO  kafka.utils.Logging$class:68 - Connected to localhost:9092 for producing
2016-04-19 01:12:34 INFO  kafka.utils.Logging$class:68 - Disconnecting from localhost:9092
2016-04-19 01:12:34 INFO  kafka.utils.Logging$class:68 - Connected to HMECL001076:9092 for producing
2016-04-19 01:12:34 INFO  kafka.utils.Logging$class:68 - Shutdown ProducerSendThread complete
2016-04-19 01:12:34 INFO  kafka.utils.Logging$class:68 - Closing all sync producers
2016-04-19 01:12:34 INFO  kafka.utils.Logging$class:68 - Disconnecting from HMECL001076:9092
2016-04-19 01:12:34 INFO  kafka.utils.Logging$class:68 - Producer shutdown completed in 298 ms

控制台消费者输出

 /opt/kafka/kafka_2.10-0.8.2.1/bin/kafka-console-consumer.sh --zookeeper localhost:2181 --topic topic-test --property group.id cs1 --from-beginning
Swapnil Test Data3
Swapnil Test Data9
Swapnil Test Data2
Swapnil Test Data5
Swapnil Test Data6
Swapnil Test Data8
Swapnil Test Data0
Swapnil Test Data1
Swapnil Test Data4
Swapnil Test Data7

无法向kafka主题发送消息

1 个答案: