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https://issues.apache.org/jira/browse/KAFKA-1316?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14005066#comment-14005066
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Neha Narkhede commented on KAFKA-1316:
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[~jkreps] Thanks for writing this up. Thought more about this. Overall, I think 
this is workable for the consumer. I was hoping to write some code to ensure 
that I didn't miss anything. Two things would help before I do that -
1. Draft patch that has the above class, the new ClientRequest and new 
ClientResponse classes
2. KAFKA-1462

If you have some version of #1, do you remind throwing it up here? I think 
[~guozhang] is looking into KAFKA-1462 already.

> Refactor Sender
> ---------------
>
>                 Key: KAFKA-1316
>                 URL: https://issues.apache.org/jira/browse/KAFKA-1316
>             Project: Kafka
>          Issue Type: Sub-task
>          Components: producer 
>            Reporter: Jay Kreps
>            Assignee: Jay Kreps
>
> Currently most of the logic of the producer I/O thread is in Sender.java.
> However we will need to do a fair number of similar things in the new 
> consumer. Specifically:
>  - Track in-flight requests
>  - Fetch metadata
>  - Manage connection lifecycle
> It may be possible to refactor some of this into a helper class that can be 
> shared with the consumer. This will require some detailed thought.



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