[tor-bugs] #21969 [Core Tor/Tor]: We're missing descriptors for some of our primary entry guards

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#21969: We're missing descriptors for some of our primary entry guards
-------------------------------------------------+-------------------------
 Reporter:  asn                                  |          Owner:  asn
     Type:  defect                               |         Status:  new
 Priority:  Medium                               |      Milestone:  Tor:
                                                 |  unspecified
Component:  Core Tor/Tor                         |        Version:  Tor:
                                                 |  0.3.0.6
 Severity:  Normal                               |     Resolution:
 Keywords:  needs-proposal, tor-guard, tor-      |  Actual Points:
  bridge, tor-client, tbb-needs,                 |
  034-triage-20180328, 034-removed-20180328      |
Parent ID:  #30817                               |         Points:  1.5
 Reviewer:                                       |        Sponsor:
-------------------------------------------------+-------------------------

Comment (by s7r):

 Still getting it often in `Tor 0.4.1.2-alpha-dev` on a service that is
 configured with `NumEntryGuards = 3`:

 {{{
 Sep 05 03:22:50.000 [notice] Our directory information is no longer up-to-
 date enough to build circuits: We're missing descriptors for 1/3 of our
 primary entry guards (total microdescriptors: 6515/6541).
 Sep 05 03:22:50.000 [notice] I learned some more directory information,
 but not enough to build a circuit: We're missing descriptors for 1/3 of
 our primary entry guards (total microdescriptors: 6515/6541).
 }}}

 If `NumEntryGuards` is > 1, and we have descriptors for at least 1 primary
 entry guard, shouldn't it be possible to still build circuits?

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/21969#comment:95>
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