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https://issues.apache.org/jira/browse/QPID-2935?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12991431#comment-12991431
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Ken Giusti commented on QPID-2935:
----------------------------------

As of 2/7/2011: Code functionally complete, and passing simple unit tests.  The 
following TODO items still pending:

o) Performance regression testing & tuning.
o) Cleanup synchronous completion case in SessionState ~line 267
o) Sends completion on every execution.sync, else hangs. Can this be fixed?
o) Hang in clustered + async store tests.  Need debug & fix.
o) Creates a request for IOProcessing on each completion - need to aggregate 
these.
o) Reviews pending for management changes.
o) Reviews pending for queue flow limit changes.


> Support "best effort" producer flow control within the AMQP 0.10 
> implementation.
> --------------------------------------------------------------------------------
>
>                 Key: QPID-2935
>                 URL: https://issues.apache.org/jira/browse/QPID-2935
>             Project: Qpid
>          Issue Type: New Feature
>          Components: C++ Broker, C++ Client
>    Affects Versions: 0.9
>         Environment: any
>            Reporter: Ken Giusti
>            Assignee: Ken Giusti
>             Fix For: 0.9
>
>         Attachments: QPID-2935.tgz
>
>
> To what extent, if any, could producer flow control be supported on the 
> existing (pre-1.0) protocol?
> In the current C++ broker/client implementation, when a queue on the broker 
> fills to the point where it cannot accept any more messages 
> (--default-queue-limit hit), the broker will forcibly disconnect any client 
> that attempts to route a message to that queue.   This is an abrupt failure - 
> the producing client is not privy to the queue's remaining capacity.  The 
> broker provides no feedback to the producing client, which could be used to 
> throttle the client's message production rate.
> The purpose of this JIRA is to explore the possible methods for implementing 
> producer throttling on the current 0.10 C++ codebase. 

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