Let's review:

Google has cached a blank version of your / page.

The blank page is only about 12 hours old. The max-age is set to 1 year. So 
this problem will go away on its own in a year.

It really sucks to be you right now. :(

You should try really, really hard to figure out how this happened. I've never 
heard of anything like this on these lists, so it's likely that it's a bug in 
your code someplace that can yield blank page with a 1 year timeout.

If you repeat that telnet session, you can probably figure out more exactly 
when the page was cached, then you can look at your logs to figure out what 
caused it. Maybe.

Getting the problem cleared would require some manual intervention from google. 
They'd have to manually invalidate that cache entry. I'd bet money that the 
Google App Engine team has no ability whatever to cause that to happen. Upgrade 
to a $500/month enterprise account perhaps?

I've been trying to think of a way to fix this using DNS, but I'm coming up 
empty, short of changing your domain name.

-Joshua

On Apr 27, 2012, at 3:53 PM, Gregory Nicholas wrote:

> yep.. bingo.. what are my options from here?
> 
> 
> 
> On Fri, Apr 27, 2012 at 12:29 PM, Joshua Smith <joshuaesm...@charter.net> 
> wrote:
> You could test this theory by hitting /?foo
> 
> On Apr 27, 2012, at 3:17 PM, Matthew Blain wrote:
> 
> > Typically a 204 with nothing run is simply a signal that your content
> > has been cached elsewhere in Google's network. If you responded with
> > cache-control: public with a max-age of something, it may be cached
> > until that expires.
> > Without futher info (such as an appid or the domain), it's hard to
> > tell what's going on.
> >
> > On Apr 27, 11:34 am, Gregory Nicholas <faction.greg...@gmail.com>
> > wrote:
> >> really need help.. i'm at a place where i can't really fix this on my own..
> >> it's 11:00am.. been trouble shooting this since 9pm last night (thank god
> >> for adderall)
> >>
> >> *Preface (kinda):*
> >>
> >>    - we've been working with appengine for a couple years now (haven't seen
> >>    everything, but been through a lot of troubleshooting)
> >>    - python 2.7, webapp 2.3, django 1.2, HRD
> >>    - absolutely NO issues with local dev environ, production issue only
> >>
> >> *Issue / Symptoms:*
> >>
> >>    - only the main url path: "/" for my app domain is not serving the
> >>    request to my app
> >>    - essentially breaks down to only the home page not working on
> >>    http://www.<domainname>.com
> >>    - the main url path for the appspot
> >>    domain: http://<domainname>.appspot.com serves
> >>       - request is routed properly from the app.yaml to my request handler
> >>    - on http://<domainname>.com, any request to a subpath STILL WORKS!
> >>       - ex: http://< domainname >.com/user/login serves, works
> >>    - the request IS hitting my application:
> >>       - attached is a screen shot of my app logs, where the main path 
> >> serves
> >>          - not hitting my app.yaml file, and not routed to any request
> >>          handlers
> >>          - appears as though my code is never being executed for the 
> >> request
> >>
> >> *What I've tried:*
> >>
> >>    - i telnet'ed and tracerouted the domain name to rule out it being a DNS
> >>    issue
> >>       - see attached terminal screenshot
> >>    - i've redeployed my app several times
> >>    - i reverted the default version to a previous version
> >>    - i've shutdown any instances several times
> >>    - i switched from automatic instance allocation to manual, switching
> >>    from F1 to F2 classes
> >>
> >> PLEASE HELP!!!
> >>
> >>  Screen Shot 2012-04-27 at 11.14.15 AM.png
> >> 193KViewDownload
> >>
> >>  Screen Shot 2012-04-27 at 11.31.23 AM.png
> >> 156KViewDownload
> >
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