[jira] [Created] (FLINK-7406) Implement Netty receiver incoming pipeline for credit-based

["zhijiang (JIRA)" <ji...@apache.org>]

zhijiang created FLINK-7406:
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             Summary: 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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