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  1. Kafka
  2. KAFKA-933

Hadoop example running DataGenerator causes kafka.message.Message cannot be cast to [B exception

    Details

    • Type: Bug
    • Status: Resolved
    • Priority: Minor
    • Resolution: Fixed
    • Affects Version/s: 0.8.0
    • Fix Version/s: 0.8.1
    • Component/s: contrib
    • Labels:
    • Environment:

      Description

      Working of git master codebase

      and following instructions at

      https://github.com/apache/kafka/blob/trunk/contrib/hadoop-consumer/README

      https://github.com/apache/kafka

      when running

      ./run-class.sh kafka.etl.impl.DataGenerator test/test.properties

      an exception is thrown

      Exception in thread "main" java.lang.ClassCastException: kafka.message.Message cannot be cast to [B
      at kafka.serializer.DefaultEncoder.toBytes(Encoder.scala:34)
      at kafka.producer.async.DefaultEventHandler$$anonfun$serialize$1.apply(DefaultEventHandler.scala:129)
      at kafka.producer.async.DefaultEventHandler$$anonfun$serialize$1.apply(DefaultEventHandler.scala:124)
      at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:233)
      at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:233)
      at scala.collection.Iterator$class.foreach(Iterator.scala:772)
      at scala.collection.JavaConversions$JIteratorWrapper.foreach(JavaConversions.scala:573)
      at scala.collection.IterableLike$class.foreach(IterableLike.scala:73)
      at scala.collection.JavaConversions$JListWrapper.foreach(JavaConversions.scala:615)
      at scala.collection.TraversableLike$class.map(TraversableLike.scala:233)
      at scala.collection.JavaConversions$JListWrapper.map(JavaConversions.scala:615)
      at kafka.producer.async.DefaultEventHandler.serialize(DefaultEventHandler.scala:124)
      at kafka.producer.async.DefaultEventHandler.handle(DefaultEventHandler.scala:54)
      at kafka.producer.Producer.send(Producer.scala:74)
      at kafka.javaapi.producer.Producer.send(Producer.scala:41)

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            • Assignee:
              Unassigned
              Reporter:
              andrewmilkowski Andrew Milkowski
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              • Created:
                Updated:
                Resolved: