Hello all,

We have faced a problem when sending messages to an external system with:

QPID_MESSAGING_EXTERN void            send (const Message &message, bool 
sync=false)

Using:
qpid-cpp-1.39.0
qpid-proton-0.25.0

The problem is that when external user doesn't dequeue nor TCP ACK messages 
sender is blocked. We have tried to use sync parameter or
QPID_MESSAGING_EXTERN uint32_t    getCapacity ()

But it is no way to detect this issue or to try to make send non block.

Is there any way to make send procedure non-blocking in the same way that a TCP 
send can be set as non-blocking? Or have you any other way to check this 
problem?



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