Comment #45 on issue 16367 by [email protected]: some http requests take
many seconds or minutes
http://code.google.com/p/chromium/issues/detail?id=16367
Here is one possible explanation which fits the data, but isn't fully
satisfying as it depends on weird server configuration:
In the HTTP response I noticed the server specifies a timeout in the
keep-alive header:
Keep-Alive: timeout=15, max=???
(I forget the exact value of max, but it doesn't really matter for the sake
of my argument, since neither Chrome nor Firefox respect it).
Fact:
Chromium DOES NOT respect timeout= argument in Keep-Alive headers.
Fact:
Firefox DOES respect the timeout= argument in Keep-Alive.
So what does this mean?
Well, if we had been running in Firefox it would have never hit this
problem.
After 15 seconds it would have closed the connection (respecting the
timeout= parameter), and so at t=146 we would have opened a fresh
connection to the server and things are peachy.
Whereas on Chromium, after 146 seconds we still have the same socket open,
and we now try using it, and for whatever reason the server doesn't
respond.
Supposition:
Maybe developer.apple.com has some optimization / DDOS protection or
whatever, which gives it a tendency to hose TCP connections after the
timeout has expired. [This is the unsatisfying part of my argument, but is
at least testable].
We could further postulate that this only "reproduces" on Mac because it is
mostly Mac users that are browsing developer.apple.com.
Regardless of what the problem actually is, respecting the timeout would
have fixed it in this case (possibly papering over some other bug).
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