[tor-bugs] #4483 [Tor]: If k of n authorities are down, k/n bootstrapping clients are delayed for minutes

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#4483: If k of n authorities are down, k/n bootstrapping clients are delayed for
minutes
-------------------------------------------------+-------------------------
 Reporter:  arma                                 |          Owner:  teor
     Type:  defect                               |         Status:
 Priority:  High                                 |  needs_review
Component:  Tor                                  |      Milestone:  Tor:
 Severity:  Normal                               |  0.2.8.x-final
 Keywords:  performance, bootstrap, dirauth-     |        Version:
  dos-resistance, tor-client, large-feature,     |     Resolution:
  prop210, 028-triage, TorCoreTeam201512         |  Actual Points:
Parent ID:  #2664                                |         Points:
  Sponsor:                                       |  medium/large
-------------------------------------------------+-------------------------
Changes (by teor):

 * status:  needs_revision => needs_review


Comment:

 This change is ready for review as branch feature4483-v10 on
 https://github.com/teor2345/tor.git

 It passes all the chutney "make test-network-all" checks.

 The branch includes commits for:
 * Prevent fallback directory mirror loops (#17574)
 * Adjust clock skew message for fallback directories (#17716)

 I'll be testing it extensively over the next few days in the following
 roles:
 * client
 * hidden service
 * bridge

 (Anything Tor instance that thinks it should fetch from the authorities
 doesn't run this multiple simultaneous connection code.)

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/4483#comment:33>
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