Though I have so many users, each user has an internal limit of 100
unfollows per day which is well within any sort of limits. That is one
of the reasons why I never implemented any queuing mechanism, such
short number of unfollows can be done instantly.

Besides, there were no sudden spikes in traffic so this sudden rate
limiting baffles me. And automated unfollows are not allowed so I
thought queuing wouldn't be a good idea. I'll try to implement
something like that but what's the short term solution? Can you do
something on your end to remove the rate limit if any that might have
been put on my app?

I have always adhered to twitter limits and rules never going out of
my way. Please help me with this.

-Nischal

On Apr 6, 9:00 pm, Taylor Singletary <taylorsinglet...@twitter.com>
wrote:
> By running on Google App Engine, or any host where you share IP addresses
> with another service, you're going to be at a disadvantage when it comes to
> abuse detection -- my advice would be to ensure you have a queue system in
> place for API actions you take (really any application servicing anywhere
> near as many users as you do should have this in place), especially actions
> applied in bulk -- you will have times that you need to queue up your
> actions until you can resume making requests -- the best way to detect if
> you can resume making requests is by intermittently trying a single item at
> the top of the queue once every few seconds, increasing the duration you
> wait with every failed request.
>
> You never want to continue bursting when faced with an error like this, it
> would only make your application appear more abusive to the metrics-oriented
> unfeeling eye of an abuse detection algorithm.
>
> @episod <http://twitter.com/episod> - Taylor Singletary
>
> On Wed, Apr 6, 2011 at 8:47 AM, nischalshetty 
> <nischalshett...@gmail.com>wrote:
>
>
>
>
>
>
>
> > Hi,
>
> > It's my apphttp://justunfollow.comIt's been running from more than a
> > year now. I did not see any sudden increase in traffic or any of that
> > sort. It's hosted on the Google Appengine and there were 2 cases in
> > the entire year when appengine ips were blocked by twitter.
>
> > I have more than 200,000 users. Your advice would be greatly
> > appreciated. I do not make use of any search or trends api.
>
> > -N
>
> > On Apr 6, 8:41 pm, Taylor Singletary <taylorsinglet...@twitter.com>
> > wrote:
> > > Unfollowing is not "rate limited" by the API, but we have organic limits
> > on
> > > most write actions service-wide to prevent certain kinds of bursty
> > behavior.
> > > Best to back off from retrying requests when you get an error like this
> > for
> > > an exponentially increasing amount of time -- first 30 seconds, then a
> > > minute, then a few minutes, then 10 minutes, etc.
>
> > > @episod <http://twitter.com/episod> - Taylor Singletary
>
> > > On Wed, Apr 6, 2011 at 8:31 AM, nischalshetty <nischalshett...@gmail.com
> > >wrote:
>
> > > > I am getting this for the Unfollow method. This shouldn't happen for
> > > > the unfollow API. Can someone at twitter look into it?
>
> > > > -N
>
> > > > On Apr 6, 8:24 pm, nischalshetty <nischalshett...@gmail.com> wrote:
> > > > > 420:Returned by the Search and Trends API when you are being rate
> > > > > limited (http://dev.twitter.com/pages/rate-limiting).
> > > > > Returned by the Streaming API:
> > > > >  Too many login attempts in a short period of time.
> > > > >  Running too many copies of the same application authenticating with
> > > > > the same account name.
>
> > > > > I'm getting the above error. It's in large numbers. Can someone help?
>
> > > > --
> > > > Twitter developer documentation and resources:
> >http://dev.twitter.com/doc
> > > > API updates via Twitter:http://twitter.com/twitterapi
> > > > Issues/Enhancements Tracker:
> > > >http://code.google.com/p/twitter-api/issues/list
> > > > Change your membership to this group:
> > > >http://groups.google.com/group/twitter-development-talk
>
> > --
> > Twitter developer documentation and resources:http://dev.twitter.com/doc
> > API updates via Twitter:http://twitter.com/twitterapi
> > Issues/Enhancements Tracker:
> >http://code.google.com/p/twitter-api/issues/list
> > Change your membership to this group:
> >http://groups.google.com/group/twitter-development-talk

-- 
Twitter developer documentation and resources: http://dev.twitter.com/doc
API updates via Twitter: http://twitter.com/twitterapi
Issues/Enhancements Tracker: http://code.google.com/p/twitter-api/issues/list
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