1.1 was a devil for this.
I can't provide a good explanation, except that:
The parent is always used unless:
* The URL matches a string in hierarchy_stoplist
* The request is a POST
* Parent is down
* ssl_proxy/wais_relay say otherwise and it's one of those kind of
* Some particular network configuration..it has to do with busy links, I
know that. If there is packet-loss between you and your parent and/or
high-latency squid seems to fetch directly from the origin server, even
if it has not marked the parent as down. Obviously, this will be a
common feature of squid 1.1 with the ICMP code compiled in, but I've
seen it happen fairly frequently without it. No idea why.
> On Wed, 3 Jun 1998, Duane Wessels wrote:
> > > My "hierarchy_stoplist" is empty, but in netstat -t dump I still can
> > >see connections made directly to WWW servers instead of to parent proxy.
> > >What can be wrong?
> > Squid doesn't use the parents if it thinks they are down.
> The parents are apparently up! When I use cachemgr.cgi to see info on
> the parent server it says they are up. And also my squid does parent
> fetches, but also lots of direct ones.
> Borek Lupomesky
> BOREK LUPOMESKY, network administrator University of J. E. Purkyne
> WWW: http://www.ujep.cz/~lupomesk/ Ceske mladeze 8
> IRCnet: Borek @ #usti Usti nad Labem, 40012
> talk: firstname.lastname@example.org The Czech Republic
> PGP keyid: 9DD1C54D tel: +420-602-376368
> ==========[ MIME/ISO-8859-2 & PGP encrypted mail welcome ]===========
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