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Configure keepAliveTimeout/timeout on HTTP server (Node 8+) to prevent increased delay after idling #165
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Reference: github/JavaScriptServices#165
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Originally created by @aloker on 2/18/2018
See https://nodejs.org/dist/latest-v8.x/docs/api/http.html#http_server_keepalivetimeout
As described in https://github.com/aspnet/JavaScriptServices/issues/1368, starting from Node v8, the server will disconnect the socket after 5 seconds of idling. Re-establishing the socket seems to take something in the order of tenths of seconds, making SPA prerendering requests with more than 5 seconds in between taking considerably longer than necessary (e.g. >1 second).
I suggest setting the keepAliveTimeout to a higher value, or to 0 or to make it configurable.
Update: also, the
timeoutproperty (https://nodejs.org/api/http.html#http_server_timeout) should be configurable. By default, the server-socket will timeout after 2 minutes, even if the keepAliveTimeout is set to 0.