Requests matching
http://$WIKI.wikipedia.org/wiki/[uU]ndefined
have risen over the last few days, currently 40M-50M/day.
Since >99% of them come with a referrer from a corresponding wikipedia
page [1], they look wrong ... like some JavaScript requesting page
from a variable, where the variable is undefined.
Browsers identify basically as Chrome (~80%) and Firefox (~19%).
Mostly in recent versions (Chrome 35: ~75%, Firefox 29: ~17%).
Browsers identify the operating system mostly as Windows (~97%).
Requests are mostly (sorted by decreasing number of 'undefined'
requests) for enwiki, ruwiki, frwiki, plwiki, itwiki, eswiki, and to a
lesser extent also other wikis. But some of the wikis with overall many
requests do not seem affected, like jawiki, zhwiki, or dewiki.
It seems noteworthy that the client starts to request the 'undefined'
page only once the originating page and all it's assets have been served
to the client. And the client is not only requesting the 'undefined' page
once, but continuously again and again [2] for somewhere between some
seconds up to some 15 minutes. Then it stops at once, either because a
new page is requested by the client or we stop seeing requests from the
client altogether.
By the affected browsers/OS it looks a bit like it could be related to
bug 66112. But the symptoms are sufficiently different.
[1] Like a request for
http://en.wikipedia.org/wiki/undefined
coming with a referrer of
http://en.wikipedia.org/wiki/Cook_County,_Illinois
, and
http://pl.wikipedia.org/wiki/undefined
coming with a referrer of
http://pl.wikipedia.org/wiki/Eva_Green
.
[2] At a rate between 4-20 times per second. This rate seems to be
constant per client.
Version: unspecified
Severity: normal
See Also:
https://bugzilla.wikimedia.org/show_bug.cgi?id=72102
