[KAFKA-619] Regression : System Test 900x (Migration Tool) - java.lang.ClassCastException: kafka.message.Message cannot be cast to [B

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Assignee: Unassigned
• Reporter: John Fung
• Created: 16/Nov/12 16:35
• Updated: 03/Jul/13 21:40
• Resolved: 16/Nov/12 21:57

Description

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$)
. . .