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http2: release memory credit for canceled writes - #66784
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Canceled uploads left unsent bytes charged to the session, causing later requests to fail with NGHTTP2_ENHANCE_YOUR_CALM. Release the remaining credit during deferred cleanup, before running write callbacks. Signed-off-by: Fatih Güzel <fatihguzeldev@gmail.com>
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when an upload was canceled, its queued data was discarded but still counted toward the session's memory limit. that could make later requests on the same session fail with
NGHTTP2_ENHANCE_YOUR_CALM.cleanup now subtracts those bytes before running the write callbacks. the test checks both cancellation by the server and
destroy()from a write callback.Fixes: #66742