Hello,

Indeed, several weeks back subscription rate limiting was implemented to 
counter a flood of false list subscriptions.

Yesterday a new flood began, this time with requests for listinfo pages.  This 
caused load to spike on the lists server leading to request timeouts from the 
web interface.  Rate limiting of the listinfo interface was implemented as a 
stopgap measure to address this.  More details are available in the task 
https://phabricator.wikimedia.org/T196989 
<https://phabricator.wikimedia.org/T196989>

There is still work ongoing for a longer term solution.  The current thinking 
is to explore caching of listinfo pages, making these requests much less 
expensive in terms of server resources, and reducing the dependency on rate 
limiting for protection.

Best,
—Keith

> On Jun 13, 2018, at 2:56 AM, James Alexander <[email protected] 
> <mailto:[email protected]>> wrote:
> 
> That ticket (and that patch) appear to be about the flood of email 
> subscriptions and rate limiting those subscriptions and nothing specifically 
> targeting the admin interface. I'm not sure how it's causing the message 
> (whether that's intentional, a side effect of the subscription limit or 
> something entirely different).
> 
> James Alexander
> Manager, Trust & Safety
> Wikimedia Foundation
> 
> 
> On Tue, Jun 12, 2018 at 11:47 PM Patrick Rother <[email protected] 
> <mailto:[email protected]>> wrote:
> On Wed, Jun 13, 2018 at 08:34:30AM +0200, Raimond Spekking wrote:
> > Am 13.06.2018 um 08:28 schrieb Patrick Rother:
> > > Hello.
> > >
> > > On Wed, Jun 13, 2018 at 08:24:15AM +0200, Raimond Spekking wrote:
> > >> Seems so since 5 weeks:
> > >> https://gerrit.wikimedia.org/r/#/c/operations/puppet/+/432168/ 
> > >> <https://gerrit.wikimedia.org/r/#/c/operations/puppet/+/432168/>
> > >>
> > >> And a secret task; https://phabricator.wikimedia.org/T194032 
> > >> <https://phabricator.wikimedia.org/T194032>
> > >>
> > >> Found on https://wikitech.wikimedia.org/wiki/Server_Admin_Log#2018-05-11 
> > >> <https://wikitech.wikimedia.org/wiki/Server_Admin_Log#2018-05-11>
> > > Good.
> > >
> > > I cannot access the task. Can you please give me any hint whom to
> > > contact for a change?
> > >
> > Me neither :-(
> > 
> > The patch was submitted byKeith Herron <[email protected] 
> > <mailto:[email protected]>>
> > <https://gerrit.wikimedia.org/r/#/q/owner:kherron%2540wikimedia.org+status:merged
> >  
> > <https://gerrit.wikimedia.org/r/#/q/owner:kherron%2540wikimedia.org+status:merged>>
> 
> Will contact him. Thank you.
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