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From Andrew Milkowski <amgm2...@gmail.com>
Subject Hadoop example running DataGenerator causes kafka.message.Message cannot be cast to [B exception
Date Thu, 30 May 2013 20:47:05 GMT
Hi,

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)

please advice, thank you!

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