Robbie Gemmell updated PROTON-940:
    Attachment: 0001-PROTON-940-calculate-the-incoming-window-before-send.patch

Attaching change which fixes this. This patch is dependant on earlier (but not 
yet committed) outgoing window changes made via the PR on PROTON-936.

> provide the session initial incoming window via Begin rather than sending a 
> separate Flow
> -----------------------------------------------------------------------------------------
>                 Key: PROTON-940
>                 URL: https://issues.apache.org/jira/browse/PROTON-940
>             Project: Qpid Proton
>          Issue Type: Bug
>          Components: proton-j
>    Affects Versions: 0.8, 0.9, 0.9.1
>            Reporter: Robbie Gemmell
>            Assignee: Robbie Gemmell
>             Fix For: 0.10
>         Attachments: 
> 0001-PROTON-940-calculate-the-incoming-window-before-send.patch
> When a session is created, a Begin frame is sent. One of the fields on the 
> frame is the initial incoming window. Instead of populating the field, 
> Proton-J currently sets it to 0 but then immediately discovers the window is 
> 0 and sends a seperate Flow frame (in the same transport output sas the Begin 
> frame) changing the window to the actual calculated value.
> This result is equivalent in the end and allowed by the protocol, but is not 
> particularly obvious behaviour and is different than proton-c. The initial 
> incoming window value should be conveyed in the Begin frame instead, removing 
> need for the immediate Flow.

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