Credit window not automatically handled for unaquired subscription mode
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Key: QPID-1989
URL: https://issues.apache.org/jira/browse/QPID-1989
Project: Qpid
Issue Type: Bug
Components: C++ Client
Affects Versions: 0.5
Environment: SACQUIRE_MODE_NOT_ACQUIRED
Reporter: Gordon Sim
Assignee: Gordon Sim
Fix For: 0.6
If you have a subscription using ACQUIRE_MODE_NOT_ACQUIRED in conjunction with
a credit window (e.g. FlowControl::messageWindow(1)), then even with autoAck
set there is no automatic completion information sent to the broker which means
that the credit window is not moved forward and messages stop getting
delievered when the window gets used up.
This can be worked around easily enough by calling Session::sendCompleted()
(in the default COMPLETE_ON_DELIVERY mode the completion is marked, just not
sent to the broker).
However it would be more intuitive and convenient to handle this case by
sending completion at a frequency dictated by the autoAck value even if not
sending an accept (due to messages not being acquired).
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