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https://issues.apache.org/jira/browse/KAFKA-197?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13162587#comment-13162587
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Jay Kreps commented on KAFKA-197:
---------------------------------

I don't think we want to call halt(), that is like kill -9 the process. I think 
we want the logs to flush and shutdown gracefully. Can't we just do a graceful 
shutdown on both the server and the embedded consumer?
                
> Embedded consumer doesn't shut down if the server can't start
> -------------------------------------------------------------
>
>                 Key: KAFKA-197
>                 URL: https://issues.apache.org/jira/browse/KAFKA-197
>             Project: Kafka
>          Issue Type: Bug
>    Affects Versions: 0.7
>            Reporter: Jun Rao
>             Fix For: 0.7.1
>
>         Attachments: KAFKA-197.patch
>
>
> If a broker embeds a consumer and the broker itself doesn't start (e.g., 
> conflicting broker id in ZK), the embedded consumer is still running. In this 
> case, we should probably shut down the embedded consumer too.
> To do this, we need to either throw an exception or return an error in 
> KafkaServer.startup and act accordingly in KafkaServerStartable.startup.

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