Hello Siegfried,

Yes, it is possible. I see at least one cause: you made twice the
subscription to this feed with 2 different callback urls
["hub.callback" param when you subscribe] even located on the  same
site.

Then, on each update, the hub will call you back twice: once on each
url.

This may for example happen when you change the structure of your
callback url in a new version of your app and you do an automatic
regular re-subscribe to the feed -> the callback url should be
carefully thought at beginning and never changed or subscription
should be properly cancelled and resubscribed when callbacl changes.

regards
didier

On Apr 22, 11:15 am, Siegfried Hirsch <[email protected]>
wrote:
> Hello,
>
> I have a small app running, which subscribes to feeds on PuSH. I am
> not sure, but it looks, PuSH is delivering the feeds more than once.
> Is it possible, that PuSH has registered more than one subscribe from
> my app? I am using pubsubhubbub.appspot.com as my hub.
> How could I identify this? The feed is the same in both pushes from
> PuSH to my app.
>
> Siegfried
>
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