I've seen problems with the Channel API where both sides of the connection 
were "half open", i.e. each side believed there was a connection but 
messages would not be sent.

I eventually replaced the Channel API with a node.js service running 
WebSockets.  The GAE app posts messages to this service using URLFetch.  It 
has worked really well so far, with only one outage incident (which was my 
own fault) and none of the issues with intermittent connectivity that I was 
seeing with Channel.

- Kris

On Sunday, December 30, 2012 12:00:42 PM UTC-8, [email protected] wrote:
>
> I've recently faced the problem. I've implemented some collaborative work 
> on my app. I've used the Channel API and it works really fine on localhost. 
> After deploy, the "update" in the other client is never received. why?
>

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