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https://issues.apache.org/jira/browse/FLINK-7406?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16121106#comment-16121106
 ] 

ASF GitHub Bot commented on FLINK-7406:
---------------------------------------

GitHub user zhijiangW opened a pull request:

    https://github.com/apache/flink/pull/4509

    [FLINK-7406][network] Implement Netty receiver incoming pipeline for 
credit-based

    ## What is the purpose of the change
    
    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 of channel 
is set false.
    
    For credit-based mode, `PartitionRequestClientHandler` can always get 
buffer from `RemoteInputChannel` for reading messages from producer, and update 
backlog of producer to trigger requests of floating buffers.
    
    This pull request depends on previous two 
[PRs](https://github.com/apache/flink/pull/4499) whose commits are also 
included for passing travis, so review the third commit for this pull request 
change.
    
    In order not to affect the current process and existing cases, we implement 
a temporary netty handler called `CreditBasedClientHanlder` which will replace 
the current `PartitionRequestClientHandler` after whole feature codes are 
submitted.
    
    ## Brief change log
    
      - *Add the backlog of producer in `BufferResponse` message structure*
      - *Netty handler requests buffer from `RemoteInputChannel` directly*
      - *Netty handler updates backlog for `RemoteInputChannel`, and it may 
trigger requests of floating buffers from `BufferPool`*
    
    ## Verifying this change
    
    This change added tests and can be verified as follows:
    
      - *Modified netty message serialization tests for new added backlog in 
`BufferResponse`*
      - *Some additional tests and cases would be supplied after the sender 
logic submitted*
    
    ## Does this pull request potentially affect one of the following parts:
    
      - Dependencies (does it add or upgrade a dependency): (no)
      - The public API, i.e., is any changed class annotated with 
`@Public(Evolving)`: (no)
      - The serializers: (no)
      - The runtime per-record code paths (performance sensitive): (no)
      - Anything that affects deployment or recovery: JobManager (and its 
components), Checkpointing, Yarn/Mesos, ZooKeeper: (no)
    
    ## Documentation
    
      - Does this pull request introduce a new feature? (no)
      - If yes, how is the feature documented? (not applicable)


You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/zhijiangW/flink FLINK-7406

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/flink/pull/4509.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #4509
    
----
commit 5c7a27f6fdd215150174c7827cc87b5ea08e01bc
Author: Zhijiang <wangzhijiang...@aliyun.com>
Date:   2017-08-07T09:31:17Z

    [FLINK-7378][core]Implement the FixedBufferPool for floating buffers of 
SingleInputGate

commit f5fb7baeeac3be3719555e37c39d07839d094799
Author: Zhijiang <wangzhijiang...@aliyun.com>
Date:   2017-08-09T05:43:56Z

    [FLINK-7394][core]Implement basic InputChannel for credit-based logic

commit d6e35a06e43cf6e7e8d548ebff34dd9877f749bb
Author: Zhijiang <wangzhijiang...@aliyun.com>
Date:   2017-08-10T05:29:13Z

    [FLINK-7406][network]Implement Netty receiver incoming pipeline for 
credit-based

----


> 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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