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Re: Strange "couldn't connect to host" error

From: Dan Fandrich <>
Date: Thu, 31 May 2007 13:24:05 -0700

On Thu, May 31, 2007 at 03:42:30PM -0400, Jonathan Arnold wrote:
> We have a routine that gets called every second, goes out to the web,
> and downloads a tiny (about 50 characters) file. It runs okay for
> some random time, say 30 minutes, but then returns back a "Couldn't
> connect to host" error. If I stop it in the debug, and move back the
> current statement and just retry the Curl_PerformHttp call, it
> works just fine. This is on Windows (XP in my case). The timer code
> is pretty straightforward:

Could it be that your web server is legitimately refusing connections? It's
possible (though a bit unlikely) that it sees so many connections as a
potential DOS and is denying access occasionally. Or perhaps it's hitting
a limit on the number of new connections in a short period. Try tweaking
the server settings and see if the problem is fixed. Are you using
persistent connections?

>>> Dan

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Received on 2007-05-31