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java.lang.String cannot be cast to [B
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)