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https://issues.apache.org/jira/browse/DISPATCH-1751?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17219143#comment-17219143
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ASF GitHub Bot commented on DISPATCH-1751:
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ChugR opened a new pull request #890:
URL: https://github.com/apache/qpid-dispatch/pull/890
Proton allows specification of a session 'capacity'. Initially the
incoming-window will be (capacity / max-frame-size), defining at most
how many max-size transfers will definitely be accepted on the session.
Dispatch listener config defines a maxFrameSize and a maxSessionFrames
the product of which is equal to the capacity to be configured in Proton.
Dispatch vhostUserGroup policy defines a maxFrameSize and a
maxSessionWindow. The maxSessionWindow is passed directly to Proton
as the capacity.
The interface to Proton defines capacity with type 'size_t'. It is possible
to have a (maxFrameSize * maxSessionFrames) product be larger than
that allowed by a size_t on a 32-bit system. Perform the capacity
calculations using 64-bit integers before applying the results and
sending them to Proton.
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> unexpected incoming-window in begin frame when running Dispatch on 32 bit
> system
> --------------------------------------------------------------------------------
>
> Key: DISPATCH-1751
> URL: https://issues.apache.org/jira/browse/DISPATCH-1751
> Project: Qpid Dispatch
> Issue Type: Bug
> Affects Versions: 1.13.0
> Reporter: Ganesh Murthy
> Priority: Major
> Fix For: 1.15.0
>
>
> On 32bit systems, an unexpected incoming-window value is set. This for
> example causes system_tests_protocol_settings failures on 32bit systems, with
> test expecting to see the incoming-window be 2147483647 but instead finding
> it much less, e.g 131071.
> This is due to the way the session capacity is configured, particularly on
> 32bit systems. See more details (output, code, etc) from prior discussions on
> PROTON-2255 (raised when this was incorrectly thought to be a proton issue).
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