[jira] [Resolved] (KAFKA-3401) Message format change on the fly breaks 0.9 consumer

["Ismael Juma (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/KAFKA-3401?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ismael Juma resolved KAFKA-3401.
--------------------------------
    Resolution: Not A Problem

Thanks for clarifying Becket. [~enothereska], please update the test to take Becket's comment into account.

> Message format change on the fly breaks 0.9 consumer
> ----------------------------------------------------
>
>                 Key: KAFKA-3401
>                 URL: https://issues.apache.org/jira/browse/KAFKA-3401
>             Project: Kafka
>          Issue Type: Bug
>    Affects Versions: 0.10.0.0
>            Reporter: Eno Thereska
>            Assignee: Jiangjie Qin
>            Priority: Blocker
>             Fix For: 0.10.0.0
>
>         Attachments: 2016-03-15--009.zip
>
>
> The new system test as part of KAFKA-3202 reveals a problem when the message format is changed on the fly. When the cluster is using 0.10.x brokers and producers and consumers use version 0.9.0.1 an error happens when the message format is changed on the fly to version 0.9:
> {code}
> Exception: {'ConsoleConsumer-worker-1': Exception('Unexpected message format (expected an integer). Message: null',)}
> {code}



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