Details
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Bug
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Resolution: Unresolved
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Major
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None
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2.0.1.Final
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None
Description
If an HTTP2 client sets the SETTINGS_MAX_FRAME_SIZE it essentially has no effect because the frame size used to sent to the client is based on the Undertow setBufferSize() option as well.
This is not ideal - even if the server is using a smaller buffer size it should still send frames up to the max frame size set by the client - it should use more chained buffers in this case.
As I said, you can get around this by setting a larger setBufferSize() but this has overhead implications - especially if the client wants to use really large frames - up to 16MB.