rschmitt opened a new pull request #167: Don't apply INITIAL_WINDOW_SIZE to connection window URL: https://github.com/apache/httpcomponents-core/pull/167 According to RFC7540 §6.9.2 ("Initial Flow-Control Window Size"), "the connection flow-control window can only be changed using WINDOW_UPDATE frames." Furthermore, according to §6.9 ("WINDOW_UPDATE"), the window size increment must be an unsigned integer, with a legal range being "1 to 2^31-1 (2,147,483,647) octets." In other words, when the client uses a SETTINGS frame to shrink the initial window size to a value smaller than the default (65,535 bytes), the resulting delta must only be applied to the existing child streams, and not the connection window itself. (While a *positive* delta can be applied to the connection window, this must be done explicitly by sending a WINDOW_UPDATE frame.)
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