[KAFKA-897] NullPointerException in ConsoleConsumer

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 0.8.0
• Fix Version/s: 0.8.1
• Component/s: consumer
• Assignee: Neha Narkhede
• Reporter: Colin B.
• Created: 08/May/13 00:28
• Updated: 03/Jun/13 18:01
• Resolved: 30/May/13 04:27

Description

The protocol document [1] mentions that keys and values in message sets can be null. However the ConsoleConsumer throws a NPE when a null is passed for the value.

java.lang.NullPointerException
at kafka.utils.Utils$.readBytes(Utils.scala:141)
at kafka.consumer.ConsumerIterator.makeNext(ConsumerIterator.scala:106)
at kafka.consumer.ConsumerIterator.makeNext(ConsumerIterator.scala:33)
at kafka.utils.IteratorTemplate.maybeComputeNext(IteratorTemplate.scala:61)
at kafka.utils.IteratorTemplate.hasNext(IteratorTemplate.scala:53)
at scala.collection.Iterator$class.foreach(Iterator.scala:631)
at kafka.utils.IteratorTemplate.foreach(IteratorTemplate.scala:32)
at scala.collection.IterableLike$class.foreach(IterableLike.scala:79)
at kafka.consumer.KafkaStream.foreach(KafkaStream.scala:25)
at kafka.consumer.ConsoleConsumer$.main(ConsoleConsumer.scala:195)
at kafka.consumer.ConsoleConsumer.main(ConsoleConsumer.scala)

[1] https://cwiki.apache.org/confluence/display/KAFKA/A+Guide+To+The+Kafka+Protocol#AGuideToTheKafkaProtocol-Messagesets