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https://issues.apache.org/jira/browse/KAFKA-324?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13437003#comment-13437003
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Swapnil Ghike commented on KAFKA-324:
-------------------------------------

If there is no such function in scala, we can write our own requireDummy(bool, 
errmsg, errcode-for-exception). The default way is to go back to if else and 
throw statements.
                
> enforce broker.id to be a non-negative integer
> ----------------------------------------------
>
>                 Key: KAFKA-324
>                 URL: https://issues.apache.org/jira/browse/KAFKA-324
>             Project: Kafka
>          Issue Type: Improvement
>    Affects Versions: 0.8
>            Reporter: Jun Rao
>            Assignee: Swapnil Ghike
>              Labels: newbie, noob
>         Attachments: kafka-324.patch, kafka-324-v2.patch, kafka-324-v3.patch
>
>
> In DefaultEventHandler, it seems that we rely on the fact that broker.id is a 
> non-negative integer. However, we don't enforce that in broker startup. 

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