[tor-bugs] #18816 [Core Tor/Tor]: We still wait 120 seconds for cert fetches from missing dir mirrors

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#18816: We still wait 120 seconds for cert fetches from missing dir mirrors
-------------------------------------------------+-------------------------
 Reporter:  arma                                 |          Owner:
     Type:  defect                               |         Status:
 Priority:  Medium                               |  needs_review
Component:  Core Tor/Tor                         |      Milestone:  Tor:
 Severity:  Normal                               |  0.2.8.x-final
 Keywords:  must-fix-before-028-rc,              |        Version:  Tor:
  CoreTorTeam201605                              |  0.2.8.1-alpha
Parent ID:                                       |     Resolution:
 Reviewer:  nickm                                |  Actual Points:
                                                 |         Points:  small
                                                 |        Sponsor:
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Changes (by teor):

 * keywords:  must-fix-before-028-rc => must-fix-before-028-rc,
     CoreTorTeam201605
 * status:  needs_revision => needs_review


Comment:

 My branch bug18816 on https://github.com/teor2345/tor.git has the
 following additional commits:

 973b245 Revert "fixup! Switch between fallback and authority when auth
 cert fetch fails"
 * this makes us try the recent successful dir server, then a fallback,
 then an authority, reducing the number of clients authorities can
 enumerate
 * fix NM1 in comment 6

 b29bc39 Clarify when it is safe to call download_status_cert_init
 * it's only safe to call download_status_cert_init on a dlstatus that
 hasn't been used for downloads
 * fix NM1 in comment 6 (nickm said he'd fix it, but I was making changes
 anyway)
 * comment-only change

 My branch bug18816-squashed:
 * rebases on the latest maint-0.2.8,
 * removes bea0819 and its matching revert 973b245,
 * squashes b29bc39 (which is really a fixup) into f2e9af1

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/18816#comment:11>
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