[tor-bugs] #16844 [Tor]: Duplicate directory fetches when on high-latency connection

[Tor Bug Tracker & Wiki]

#16844: Duplicate directory fetches when on high-latency connection
------------------------+------------------------------------
 Reporter:  arma        |          Owner:
     Type:  defect      |         Status:  new
 Priority:  High        |      Milestone:  Tor: 0.2.8.x-final
Component:  Tor         |        Version:
 Severity:  Normal      |     Resolution:
 Keywords:  tor-client  |  Actual Points:
Parent ID:              |         Points:
  Sponsor:              |
------------------------+------------------------------------

Comment (by teor):

 We could allow only 2 simultaneous directory connections by setting
 TestingClientBootstrapConsensusMaxInProgressTries. But that would reduce
 bootstrap reliability on connections where some relays are blackholed.

 We can also tune the connection schedules introduced in #4483 to make sure
 we don't try too many connections at once.

 But I think the most effective change would be to increase the 10 second
 timeout in connection_ap_expire_beginning() to 20 or 30 seconds, and see
 how that goes.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/16844#comment:7>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online