Gordon Sim created QPID-4786:
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             Summary: Delayed response for concurrent fetches
                 Key: QPID-4786
                 URL: https://issues.apache.org/jira/browse/QPID-4786
             Project: Qpid
          Issue Type: Bug
          Components: C++ Client
    Affects Versions: 0.22
            Reporter: Gordon Sim
            Assignee: Gordon Sim
             Fix For: 0.23


Where a session has two concurrent fetch() (or indeed get()) operations in 
progress, one of them may be delayed up to the timeout even if there is in fact 
a message much earlier than that.

This is due to the design whereby the threads pop off the next message from a 
session queue, and put it into a received buffer if its not one they are 
interested in. The wrong thread can get the message, and the other thread 
remains waiting for another one before re-checking the received buffer (which 
now has a message that matches its interest).

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