[jira] [Commented] (KAFKA-2793) ConsoleConsumer crashes with new consumer when using keys because of incorrect deserializer

[ASF GitHub Bot (JIRA)]

[ 
https://issues.apache.org/jira/browse/KAFKA-2793?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=14999498#comment-14999498
 ] 

ASF GitHub Bot commented on KAFKA-2793:
---

Github user asfgit closed the pull request at:

https://github.com/apache/kafka/pull/482


> ConsoleConsumer crashes with new consumer when using keys because of 
> incorrect deserializer
> ---
>
> Key: KAFKA-2793
> URL: https://issues.apache.org/jira/browse/KAFKA-2793
> Project: Kafka
>  Issue Type: Bug
>  Components: tools
>Reporter: Ewen Cheslack-Postava
>Assignee: Ewen Cheslack-Postava
>
> The ConsoleConsumer class uses Array[Byte] everywhere, but the new consumer 
> is configured with a string key deserializer, resulting in a class cast 
> exception:
> {quote}
> java.lang.ClassCastException: java.lang.String cannot be cast to [B
>   at kafka.consumer.NewShinyConsumer.receive(BaseConsumer.scala:62)
>   at kafka.tools.ConsoleConsumer$.process(ConsoleConsumer.scala:101)
>   at kafka.tools.ConsoleConsumer$.run(ConsoleConsumer.scala:64)
>   at kafka.tools.ConsoleConsumer$.main(ConsoleConsumer.scala:42)
>   at kafka.tools.ConsoleConsumer.main(ConsoleConsumer.scala)
> {quote}
> Note that this is an issue whether you are printing the keys or not, it will 
> be triggered by any non-null key (and I'd imagine some should also trigger 
> serialization exceptions if they are not UTF8-decodeable).



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[jira] [Commented] (KAFKA-2793) ConsoleConsumer crashes with new consumer when using keys because of incorrect deserializer

[ASF GitHub Bot (JIRA)]

[ 
https://issues.apache.org/jira/browse/KAFKA-2793?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=14997993#comment-14997993
 ] 

ASF GitHub Bot commented on KAFKA-2793:
---

GitHub user ewencp opened a pull request:

https://github.com/apache/kafka/pull/482

KAFKA-2793: Use ByteArrayDeserializer instead of StringDeserializer for 
keys in ConsoleConsumer with new consumer.



You can merge this pull request into a Git repository by running:

$ git pull https://github.com/ewencp/kafka 
kafka-2793-console-consumer-new-consumer-deserializer

Alternatively you can review and apply these changes as the patch at:

https://github.com/apache/kafka/pull/482.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

This closes #482


commit b437ffa341ff9e1c8e39b74d64ba9a51785172bc
Author: Ewen Cheslack-Postava 
Date:   2015-11-10T05:44:00Z

KAFKA-2793: Use ByteArrayDeserializer instead of StringDeserializer for 
keys in ConsoleConsumer with new consumer.




> ConsoleConsumer crashes with new consumer when using keys because of 
> incorrect deserializer
> ---
>
> Key: KAFKA-2793
> URL: https://issues.apache.org/jira/browse/KAFKA-2793
> Project: Kafka
>  Issue Type: Bug
>  Components: tools
>Reporter: Ewen Cheslack-Postava
>Assignee: Ewen Cheslack-Postava
>
> The ConsoleConsumer class uses Array[Byte] everywhere, but the new consumer 
> is configured with a string key deserializer, resulting in a class cast 
> exception:
> {quote}
> java.lang.ClassCastException: java.lang.String cannot be cast to [B
>   at kafka.consumer.NewShinyConsumer.receive(BaseConsumer.scala:62)
>   at kafka.tools.ConsoleConsumer$.process(ConsoleConsumer.scala:101)
>   at kafka.tools.ConsoleConsumer$.run(ConsoleConsumer.scala:64)
>   at kafka.tools.ConsoleConsumer$.main(ConsoleConsumer.scala:42)
>   at kafka.tools.ConsoleConsumer.main(ConsoleConsumer.scala)
> {quote}
> Note that this is an issue whether you are printing the keys or not, it will 
> be triggered by any non-null key (and I'd imagine some should also trigger 
> serialization exceptions if they are not UTF8-decodeable).



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