无法将消息发送到kafka主题 [英] Not able to send messages to kafka topic

问题描述

我正在使用Kafka，Play和Scala.这是我的代码，我要将邮件发送到kafka服务器，主题名称为" test-topic ".尽管没有在主题中看到发送的消息，但我没有收到任何错误这里有什么问题吗

I am using Kafka, Play as well as Scala. This is my code , where i want to send messages to kafka server,Topic name is "test-topic" . i am not getting any error though i haven't seen my sent messages in the topics is there anything wrong here

 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()
        }
      }

    }

推荐答案

您的代码没有错.

• 检查您的log4j属性以查看日志
• 您运行的是什么版本的kafka，与您的客户端版本相同.
• 首先创建一个主题链接
• 检查服务器是否正在运行以及是否已创建主题，并且您可以与控制台生产者和使用者示例

应用程序日志

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

这篇关于无法将消息发送到kafka主题的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！