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Re: [tor-bugs] #16028 [Tor Browser]: Many users seem to be failing incremental updates to 4.5.1

#16028: Many users seem to be failing incremental updates to 4.5.1
-----------------------------+-------------------------
     Reporter:  mikeperry    |      Owner:  tbb-team
         Type:  defect       |     Status:  new
     Priority:  major        |  Milestone:
    Component:  Tor Browser  |    Version:
   Resolution:               |   Keywords:  tbb-updater
Actual Points:               |  Parent ID:
       Points:               |
-----------------------------+-------------------------

Comment (by mikeperry):

 Wrt the size question, if I ignore 206 requests, I am not seeing any
 evidence of partial downloads of incrementals. This probably rules out 2
 and 3, unless there is an issue in the 206 behavior that I can't see (we
 scrub IP addresses in logs, so even if concurrent exit IP usage wasn't
 common I still couldn't total 206 values across requests). Oddly, there
 are a few 416 requests (partially satisfied range requests), but less than
 a hundred per day.

 There does appear to be at least one crawler involved. It is setting the
 referer header to the containing directory. It is also performing less
 than a hundred requests per day.

 One more datapoint: The total counts of full update downloads exceeded the
 incremental download counts on May 17th, and there have been more full
 update downloads than incremental downloads every since. I am now
 wondering if we may actually be seeing users failing the full update and
 retrying repeatedly, perhaps due to #15857 or some other issue? Here's the
 counts from today on one mirror:
 {{{
 $ grep ".mar " dist.torproject.org-access.log | grep -v "GET
 /torbrowser/4.0.8/" | grep -v 206 | grep incremental -c
 13524
 $ grep ".mar " dist.torproject.org-access.log | grep -v "GET
 /torbrowser/4.0.8/" | grep -v 206 | grep incremental -c -v
 16605
 }}}

 Unless we have other ideas, my next plan is to create some munin scripts
 to monitor this for future releases, so we can get an idea what happens
 when we don't update the torrc or startup scripts, and don't have #15857
 in the mix.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/16028#comment:6>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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