The one time I had this problem in chrome and looked at the source,
the file was completely blank. Unfortunately it's hard to reproduce.

-Andrin

On Thu, Nov 10, 2011 at 12:52 AM, Pascal Patry <[email protected]>wrote:

> On Wednesday, November 09, 2011 16:28:29 Andrin von Rechenberg wrote:
> > Hey there
> >
> > /_ah/channel/jsapi returns an empty file for 0.3% of clients
> >
> > We heavily use the Channel API javascript library (we do more than
> > 1'000'000 calls a day).
> >
> > About every 300th session the file returned by "/_ah/channel/jsapi" is
> > completely blank and
> > therefore "new goog.appengine.Channel(id);" fails, because "goog" is not
> > defined. We see
> > this more often happening on Android Devices than desktop computers.
> >
> > The most annoying thing however is, that this blank js file is then
> cached
> > on the client side for
> > a very long time and reloading the page doesnt help to fix the js error.
> > You need to clear your cache to fix it.
> >
> > We have seen this issue consistently for a couple of weeks now and were
> > able to measure it continuously.
> >
> > I have filed a production bug here:
> > http://code.google.com/p/googleappengine/issues/detail?id=6294
> > Please star it if you use the Channel API.
>
> I have been hunting down this issue as well. We often get it on iOS as
> well as Android.
>
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