Hi,
since several people on this list are working with zero logs, please be aware that it seems the X-Analytics header was changed behind our back with
https://gerrit.wikimedia.org/r/#/c/119795/
. So while you were loosing hardly anything up to now, if you scripts didn't handle the list-nature of X-Analytics, this changed considerably in the last few hours.
Please make sure your zero-handling scripts properly handle the list-nature of X-Analytics, or you will loose a considerable amount of zero traffic otherwise.
Newly, fields in X-Analytics column seem to be * https=1 (if the request came through https) * proxy=Opera (if the request came through an Opera proxy to us)
I hope the Wikipedia Zero team will soon update
https://wikitech.wikimedia.org/wiki/X-Analytics
with a more authorative description.
Have fun, Christian
P.S.: Note that (maybe related to this change), some zero tags are now doubled: https://bugzilla.wikimedia.org/show_bug.cgi?id=62922