Kalv wrote: > Hey all, > > First off love the protocol! > > I'm working with twitterfeed in London, to implement pubsubhubbub as > one of the ways to get updates happening in realtime (well almost). > > In development we have implemented subscribing the topic with the > relevant hub and for some we are getting notifications coming through. > But i'm having some issues and would like to voice them and see if > anyone has any advice: > > - We keep on getting multiple notifications from the > pubsubhubbub.appspot.com hub, comparing the md5 of the notification > they do seem to be the same, for now we do a duplicate check before > processing any further. Is this normal behaviour? We do get normal > duplicates, that are different, which are probably updates to the > article. > > - I thought that blogspot had implemented Pubsubhubbub (http:// > buzz.blogger.com/2009/08/blogger-joins-hubbub.html), but by creating a > test blog I didn't see any hub declaration in an atom/rss feed, anyone > know why this is so? Are they doing something different or just not > implemented fully? > > - I'm finding it hard to debug subscriptions with TypePad, we set up a > blog there and subscribed, is there a way to confirm that the > subscription was successful? The hub sends the challenge as a http get > to the callback and we send that back, but we don't get new post > notifications - maybe this of topic here and could be a problem on > their end. > > Cheers! > Kalv. > I'm also seeing a lot of duplicate updates on my personal aggregator. I've been watching this for a few days now, and there's no pattern that I can discern in the entries that are getting pushed - it's usually 1-4 recent (but not necessarily the most recent) entries in the feed. My aggregator basically drops the update in a queue for further processing and then returns, so unless there's something seriously wrong with my internet connection, latency is well under a second. It does seem like only certain feeds get duplicated updates, so it could be a bug that only shows up under certain conditions.
I can provide more details about my aggregator, and which entries specifically are being duplicated, if necessary. --Ravi
