[
https://issues.apache.org/jira/browse/KAFKA-619?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
John Fung closed KAFKA-619.
---------------------------
> Regression : System Test 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
>
> This error is happening in : testcase_900x (migration tool test group). The
> issue is that no data is received by ConsoleConsumer. All Migration Tool
> log4j messages are showing the following error.
> . . .
> [2012-11-16 08:28:55,361] INFO FetchRunnable-1 start fetching topic: test_1
> part: 3 offset: 0 from 127.0.0.1:9093 (kafka.consumer.FetcherRunnable)
> [2012-11-16 08:28:55,361] INFO FetchRunnable-0 start fetching topic: test_1
> part: 3 offset: 0 from 127.0.0.1:9092 (kafka.consumer.FetcherRunnable)
> [2012-11-16 08:28:55,361] INFO FetchRunnable-2 start fetching topic: test_1
> part: 0 offset: 0 from 127.0.0.1:9091 (kafka.consumer.FetcherRunnable)
> 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)
> [2012-11-16 08:30:04,854] INFO
> test-consumer-group_jfung-ld-1353083318174-2b62271b begin rebalancing
> consumer test-consumer-group_jfung-ld-1353083318174-2b62271b try #0
> (kafka.consumer.ZookeeperConsumerConnector)
> [2012-11-16 08:30:04,858] INFO Constructing topic count for
> test-consumer-group_jfung-ld-1353083318174-2b62271b from *2*.* using
> \*(\p{Digit}+)\*(.*) as pattern. (kafka.consumer.TopicCount$)
> . . .
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