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https://issues.apache.org/jira/browse/FLINK-7406?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16188181#comment-16188181
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ASF GitHub Bot commented on FLINK-7406:
---------------------------------------

Github user zhijiangW commented on the issue:

    https://github.com/apache/flink/pull/4509
  
    @NicoK , I have fixed the other code issues. 
    
    For UT, I only added one test for verifying  there is no race condition 
between requesting and recycling floating buffers. I am not sure whether to 
control the process by `CountDownLatch` is enough. Or I should submit two 
different threads to execute the process repeated. If this way is ok, I will 
add more tests for race condition along with 
`NetworkBufferPool#createBufferPool()` modifications you suggested. 
    
    For fair distribution of buffers test, I will add one test, maybe in this 
PR or in #4735 later.


> Implement Netty receiver incoming pipeline for credit-based
> -----------------------------------------------------------
>
>                 Key: FLINK-7406
>                 URL: https://issues.apache.org/jira/browse/FLINK-7406
>             Project: Flink
>          Issue Type: Sub-task
>          Components: Network
>            Reporter: zhijiang
>            Assignee: zhijiang
>             Fix For: 1.4.0
>
>
> This is a part of work for credit-based network flow control.
> Currently {{PartitionRequestClientHandler}} receives and reads 
> {{BufferResponse}} from producer. It will request buffer from {{BufferPool}} 
> for holding the message. If not got, the message is staged temporarily and 
> {{autoread}} for channel is set false.
> For credit-based mode, {{PartitionRequestClientHandler}} can always get 
> buffer from {{RemoteInputChannel}} for reading messages from producer.
> The related works are:
> * Add the backlog of producer in {{BufferResponse}} message structure
> * {{PartitionRequestClientHandler}} requests buffer from 
> {{RemoteInputChannel}} directly
> * {{PartitionRequestClientHandler}} updates backlog for 
> {{RemoteInputChannel}}, and it may trigger requests of floating buffers from 
> {{BufferPool}}



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