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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-7406) Implement Netty receiver incoming pipeline for credit-based
Date Fri, 29 Sep 2017 19:14:00 GMT

    [ https://issues.apache.org/jira/browse/FLINK-7406?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16186260#comment-16186260
] 

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

Github user bowenli86 commented on a diff in the pull request:

    https://github.com/apache/flink/pull/4509#discussion_r141945843
  
    --- Diff: flink-runtime/src/main/java/org/apache/flink/runtime/io/network/netty/NettyMessage.java
---
    @@ -235,14 +240,15 @@ void releaseBuffer() {
     		ByteBuf write(ByteBufAllocator allocator) throws IOException {
     			checkNotNull(buffer, "No buffer instance to serialize.");
     
    -			int length = 16 + 4 + 1 + 4 + buffer.getSize();
    +			int length = 16 + 4 + 4 + 1 + 4 + buffer.getSize();
    --- End diff --
    
    can you please add a comment here explaining reasons of the math?


> 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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