Re: Problem with origin server connections

On Tue, 2003-03-11 at 10:40, Andres Kroonmaa wrote:
> On 11 Mar 2003, at 15:55, Henrik Nordstrom <hno@marasystems.com> wrote:
>
> > > The worse problem, however, is once this probelm occurs (origing servers
> > > "partially" down) squid refuses to serve some objects from cache. The
> > > objects are in the cache and fresh, but squid does an IMS to the origin
> > > for each request for these objects.
> >
> > Then you need to dig into the refresh logics of Squid and figure out why
> > the IMS replies received does not make Squid consider the object fresh
> > for future requests if it has failed to revalidate the object
> > previously..
>
> Not sure if this could be valid reason, but can it be that when squid
> goes for origin check, url is put into "private" state, invalidating
> local copy until origin reply allows it to become cached again. And if
> origin reply never comes, all new requests for same url have to go to
> origin?

This sounds plausible, though it seems as though the origin connection
'should' eventually time out, or does the half closed connections
setting somehow interfere with that?

>
> > Sounds odd that a reconfigure makes Squid snap out of the condition. I
> > can understand if restart helps, but not a reconfigure..
>
> All connections forcibly closed?

I will have to examine this, but I don't think that is it.

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David Nicklay
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