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AW: Random serf checkout failures

From: Markus Schaber <m.schaber_at_codesys.com>
Date: Thu, 8 Nov 2012 13:49:24 +0000

Hi, Lieven,

Von: lieven.govaerts_at_gmail.com [mailto:lieven.govaerts_at_gmail.com] Im
> On Thu, Nov 8, 2012 at 12:02 PM, Markus Schaber <m.schaber_at_codesys.com>
> wrote:
> > Von: lieven.govaerts_at_gmail.com
> > [....]
> >> 5. In one of Philip error-reporting mails, there was mention of a
> >> "408 Request Time-out" response.
> >> (http://svn.haxx.se/dev/archive-2012-11/0076.shtml).
> >> No idea if the server sends this response because one of the above
> >> issues, or if this has a different root caus. What I do know is that
> >> serf does not expect this response as it's not related to an
> >> outstanding request. In that case, serf will return and APR_GENERAL error.
> >>
> >> I think 3+4+5 are relatively easy to solve, but probably difficult to
> >> reproduce to validate the implemented solutions.
> >> 1a and 2 require more analysis, I'll try to focus on these two.
> >
> > I think 5 might be testable with a special version of mod_dontdothat
> which injects that error code, maybe conditionally or randomly.
>
> I've found a way to trigger the issue with some modifications to serf, see
> the new email thread:
> http://svn.haxx.se/dev/archive-2012-11/0238.shtml

I'm happy to hear that.

Another possibility we could keep in mind for future incidents might be a special http proxy for fault injection.
http://spareclockcycles.org/2010/06/10/sergio-proxy-released/
http://extradata.com/products/FaultFactory/
https://www.owasp.org/index.php/Category%3aOWASP_WebScarab_Project

Best regards

Markus Schaber

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Received on 2012-11-08 14:50:03 CET

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