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https://issues.apache.org/jira/browse/QPID-3629?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Gordon Sim reassigned QPID-3629:
--------------------------------
Assignee: Gordon Sim
> CPP Broker allows credit window to exceed the request size.
> -----------------------------------------------------------
>
> Key: QPID-3629
> URL: https://issues.apache.org/jira/browse/QPID-3629
> Project: Qpid
> Issue Type: Bug
> Components: C++ Broker
> Affects Versions: 0.14
> Reporter: Keith Wall
> Assignee: Gordon Sim
> Attachments:
> 0001-QPID-3629-demonstrate-credit-window-issue-using-pyth.patch
>
>
> Investigation of QPID-2703 revealed that the CPP Broker can be made to extend
> the window size beyond that requested by the client's message.flow command.
> To reproduce the problem, the client must perform the following steps:
> 1) Receive messages
> 2) Perform message stop
> 3) Perform message flow
> 4) Complete messages received by step 1)
> 5) Observe the window is the sum of that requested by step 3 + the recredit
> of messages from 1)
> The window handling behaviour of the CPP Broker was the reason that QPID-2703
> was not apparent against the CPP Broker but was against the Java Broker which
> does not expand the window in this way.
> The attached Python test demonstrates the issue by receiving more uncompleted
> message commands than the window should allow. Obviously it can be argued
> that the python test does not have the expected order of commands, but there
> is nothing stopping a client from performing such a sequence (e.g. the Qpid
> Java Client) so the broker should enforce the requested window size
> regardless.
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