Rails - Oct 2008 - "Temporary failure in name resolution" for requests but not from console

Hello,

I''ve been banging my head against this problem for a while now.
I''m
using Net::HTTP.get(URI.parse(url)) to fetch a response from another
server. It looks like this:

module Hxml
  def self.fetch
    // Not really using bbc.co.uk but it behaves the same when I do
    return Net::HTTP.get(URI.parse(''http://news.bbc.co.uk''))
  end
end

I call that from my controller on my staging box (using an HTTP
request, like normal) and it says "getaddrinfo: Temporary failure in
name resolution". Fair enough, but it does work from the console on
the staging box. In other words, from Mongrel I get an error, but from
the console it works fine. The error''s backtrace points directly to
the line above, "Net::HTTP.get".

Now, the staging server is behind a firewall that I don''t know much
about - and I can''t rule out that being the cause of the problem.
Only, how would it work from the console if that was the case? As a
double check, curl also works from a terminal too.

It all works fine on my development box (Mongrel or console) - which
just adds to the puzzle.

I would have thought that the console environment was identical to the
mongrel environment. When I start up the console it reports that is
"Loading stage environment". And I can see mongrel running using ps
and it includes "-e stage" so I''m pretty sure the
environments are the
same.

Running Ruby 1.8.6 on Rails 2.1.0, Mac OS X Server 10.5.4

Thanks.

-
Bill

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Follow up from OP:

On a suggestion by Rick Tessner, I switched from using Net:HTTP to a
simple system call to curl. Same result :( It works fine from the
console but curl returns false when called from Mongrel. It definitely
looks like Mongrel is messing things up for me. It seems a little over
the top to switch from Mongrel to something else (like Passenger?)
just because of this.

Note, using an IP address works fine in tests - but the URL I need to
use needs the domain so that it can resolve its virtual hosts.

-
Bill

On Oct 20, 4:36 pm, Bill Horsman
<bill.hors...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> Hello,
>
> I''ve been banging my head against this problem for a while now.
I''m
> using Net::HTTP.get(URI.parse(url)) to fetch a response from another
> server. It looks like this:
>
> module Hxml
>   def self.fetch
>     // Not really using bbc.co.uk but it behaves the same when I do
>     return
Net::HTTP.get(URI.parse(''http://news.bbc.co.uk''))
>   end
> end
>
> I call that from my controller on my staging box (using an HTTP
> request, like normal) and it says "getaddrinfo: Temporary failure in
> name resolution". Fair enough, but it does work from the console on
> the staging box. In other words, from Mongrel I get an error, but from
> the console it works fine. The error''s backtrace points directly
to
> the line above, "Net::HTTP.get".
>
> Now, the staging server is behind a firewall that I don''t know
much
> about - and I can''t rule out that being the cause of the problem.
> Only, how would it work from the console if that was the case? As a
> double check, curl also works from a terminal too.
>
> It all works fine on my development box (Mongrel or console) - which
> just adds to the puzzle.
>
> I would have thought that the console environment was identical to the
> mongrel environment. When I start up the console it reports that is
> "Loading stage environment". And I can see mongrel running using
ps
> and it includes "-e stage" so I''m pretty sure the
environments are the
> same.
>
> Running Ruby 1.8.6 on Rails 2.1.0, Mac OS X Server 10.5.4
>
> Thanks.
>
> -
> Bill
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Another follow up from OP:

For the record, switching to Passenger fixed the problem. I''m happy to
stick with Passenger so that''s fine. It looks like it''s
definitely a
Mongrel problem so I''ll stop by the Mongrel people to investigate
further.

Thanks for listening ;-)

-
Bill

On Oct 22, 9:10 am, Bill Horsman
<bill.hors...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> Follow up from OP:
>
> On a suggestion by Rick Tessner, I switched from using Net:HTTP to a
> simple system call to curl. Same result :( It works fine from the
> console but curl returns false when called from Mongrel. It definitely
> looks like Mongrel is messing things up for me. It seems a little over
> the top to switch from Mongrel to something else (like Passenger?)
> just because of this.
>
> Note, using an IP address works fine in tests - but the URL I need to
> use needs the domain so that it can resolve its virtual hosts.
>
> -
> Bill
>
> On Oct 20, 4:36 pm, Bill Horsman
<bill.hors...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
> > Hello,
>
> > I''ve been banging my head against this problem for a while
now. I''m
> > using Net::HTTP.get(URI.parse(url)) to fetch a response from another
> > server. It looks like this:
>
> > module Hxml
> >   def self.fetch
> >     // Not really using bbc.co.uk but it behaves the same when I do
> >     return
Net::HTTP.get(URI.parse(''http://news.bbc.co.uk''))
> >   end
> > end
>
> > I call that from my controller on my staging box (using an HTTP
> > request, like normal) and it says "getaddrinfo: Temporary failure
in
> > name resolution". Fair enough, but it does work from the console
on
> > the staging box. In other words, from Mongrel I get an error, but from
> > the console it works fine. The error''s backtrace points
directly to
> > the line above, "Net::HTTP.get".
>
> > Now, the staging server is behind a firewall that I don''t
know much
> > about - and I can''t rule out that being the cause of the
problem.
> > Only, how would it work from the console if that was the case? As a
> > double check, curl also works from a terminal too.
>
> > It all works fine on my development box (Mongrel or console) - which
> > just adds to the puzzle.
>
> > I would have thought that the console environment was identical to the
> > mongrel environment. When I start up the console it reports that is
> > "Loading stage environment". And I can see mongrel running
using ps
> > and it includes "-e stage" so I''m pretty sure the
environments are the
> > same.
>
> > Running Ruby 1.8.6 on Rails 2.1.0, Mac OS X Server 10.5.4
>
> > Thanks.
>
> > -
> > Bill
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