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https://issues.apache.org/jira/browse/QPID-2410?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12835463#action_12835463
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Steve Huston commented on QPID-2410:
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This is happening because the max frame size negotiated on the AMQP session is
64K but the max segment size reported from SSL is 16K; when the framing layer
asks for send buffers, the SSL layer keeps handing back 16K buffers, and the
framing layer keeps throwing them away and asking for another, ad infinitum.
Either the SSL layer needs to break buffers up, or the SSL size needs to be
taken into account when negotiating the AMQP max frame size. I suspect the
latter, but am open to opinions while I research how the frame size is
negotiated.
> perftest hang in SSL on Windows with large buffers
> --------------------------------------------------
>
> Key: QPID-2410
> URL: https://issues.apache.org/jira/browse/QPID-2410
> Project: Qpid
> Issue Type: Bug
> Components: C++ Client
> Affects Versions: 0.7
> Environment: Windows client, Linux broker
> Reporter: Cliff Jansen
> Assignee: Steve Huston
>
> The following command:
> perftest --count 1 --size 102400 -P ssl --port 5671 --broker linuxhost
> --username testuser --password secret --mechanism PLAIN
> hangs on a Windows client. Reducing the message body size to 1024 bytes
> makes the hang go away, as does turning off SSL.
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