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Posted to dev@kafka.apache.org by "Andrew Milkowski (JIRA)" <ji...@apache.org> on 2013/06/05 18:33:21 UTC
[jira] [Created] (KAFKA-933) Hadoop example running DataGenerator
causes kafka.message.Message cannot be cast to [B exception
Andrew Milkowski created KAFKA-933:
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Summary: Hadoop example running DataGenerator causes kafka.message.Message cannot be cast to [B exception
Key: KAFKA-933
URL: https://issues.apache.org/jira/browse/KAFKA-933
Project: Kafka
Issue Type: Bug
Components: contrib
Affects Versions: 0.8
Environment: [amilkowski@localhost ~]$ uname -a
Linux localhost.localdomain 3.9.4-200.fc18.x86_64 #1 SMP Fri May 24 20:10:49 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux
[amilkowski@localhost ~]$
Reporter: Andrew Milkowski
Priority: Minor
Fix For: 0.8
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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