John Fung created KAFKA-619:
-------------------------------

             Summary: System Test Regression 900x (Migration Tool) - 
java.lang.ClassCastException: kafka.message.Message cannot be cast to [B
                 Key: KAFKA-619
                 URL: https://issues.apache.org/jira/browse/KAFKA-619
             Project: Kafka
          Issue Type: Bug
            Reporter: John Fung


Migration thread failure due to java.lang.ClassCastException: 
kafka.message.Message cannot be cast to [B
java.lang.ClassCastException: kafka.message.Message cannot be cast to [B
        at kafka.serializer.DefaultEncoder.toBytes(Encoder.scala:36)
        at 
kafka.producer.async.DefaultEventHandler$$anonfun$serialize$1.apply(DefaultEventHandler.scala:111)
        at 
kafka.producer.async.DefaultEventHandler$$anonfun$serialize$1.apply(DefaultEventHandler.scala:106)
        at 
scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:206)
        at 
scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:206)
        at 
scala.collection.IndexedSeqOptimized$class.foreach(IndexedSeqOptimized.scala:34)
        at scala.collection.mutable.WrappedArray.foreach(WrappedArray.scala:32)
        at scala.collection.TraversableLike$class.map(TraversableLike.scala:206)
        at scala.collection.mutable.WrappedArray.map(WrappedArray.scala:32)
        at 
kafka.producer.async.DefaultEventHandler.serialize(DefaultEventHandler.scala:106)
        at 
kafka.producer.async.DefaultEventHandler.handle(DefaultEventHandler.scala:47)
        at kafka.producer.Producer.send(Producer.scala:75)
        at kafka.javaapi.producer.Producer.send(Producer.scala:32)
        at 
kafka.tools.KafkaMigrationTool$MigrationThread.run(KafkaMigrationTool.java:287)


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