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https://issues.apache.org/jira/browse/KAFKA-734?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13574273#comment-13574273
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Neha Narkhede commented on KAFKA-734:
-------------------------------------

Few problems that are not solved yet -

1. If consumer threads shutdown on their own, there is no way to shutdown the 
entire tool
2. If producer threads shutdown, there is no way to shutdown the entire tool
                
> Migration tool needs a revamp, it was poorly written and has many performance 
> bugs
> ----------------------------------------------------------------------------------
>
>                 Key: KAFKA-734
>                 URL: https://issues.apache.org/jira/browse/KAFKA-734
>             Project: Kafka
>          Issue Type: Bug
>          Components: tools
>    Affects Versions: 0.8
>            Reporter: Neha Narkhede
>            Assignee: Neha Narkhede
>            Priority: Blocker
>              Labels: p1
>         Attachments: kafka-734-v1.patch, kafka-734-v2.patch, 
> kafka-734-v3.patch, kafka-734-v4.patch
>
>
> Migration tool has a number of problems ranging from poor logging to poor 
> design. This needs to be thought through again

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