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[tor-bugs] #26485 [Core Tor/DirAuth]: June mystery: the microdesc consensus is getting 9 sigs, but the ns consensus is getting only 5



#26485: June mystery: the microdesc consensus is getting 9 sigs, but the ns
consensus is getting only 5
----------------------------------+--------------------
     Reporter:  arma              |      Owner:  (none)
         Type:  defect            |     Status:  new
     Priority:  Medium            |  Milestone:
    Component:  Core Tor/DirAuth  |    Version:
     Severity:  Normal            |   Keywords:
Actual Points:                    |  Parent ID:
       Points:                    |   Reviewer:
      Sponsor:                    |
----------------------------------+--------------------
 Lately (in the past few days) the dir auths are not getting all 9
 signatures on the same document. Frequently we're getting 5 that sign one
 and 4 that sign a different one.

 Some more digging shows that it's the ns consensus that they're
 disagreeing about, and the microdesc consensus is actually doing fine:
 {{{
 Jun 24 18:00:00.337 [info] A consensus needs 5 good signatures from
 recognized authorities for us to accept it. This ns one has 6 (dannenberg
 longclaw bastet moria1 dizum Faravahar). 3 (tor26 maatuska gabelmoo) of
 the authorities we know didn't sign it.
 Jun 24 18:00:00.538 [info] A consensus needs 5 good signatures from
 recognized authorities for us to accept it. This ns one has 6 (dannenberg
 longclaw bastet moria1 dizum Faravahar). 3 (tor26 maatuska gabelmoo) of
 the authorities we know didn't sign it.
 Jun 24 18:00:00.643 [info] A consensus needs 5 good signatures from
 recognized authorities for us to accept it. This microdesc one has 9
 (dannenberg tor26 longclaw bastet maatuska moria1 dizum gabelmoo
 Faravahar).
 Jun 24 18:00:00.871 [info] A consensus needs 5 good signatures from
 recognized authorities for us to accept it. This microdesc one has 9
 (dannenberg tor26 longclaw bastet maatuska moria1 dizum gabelmoo
 Faravahar).
 }}}

 I've hacked up moria1 to write out the consensus document that it
 generates, for each flavor, in #4363. The theory is that we need to figure
 out how the ns consensus that we generated differs from the one that the
 other dir auths generated.

 Next step is for moria1 to be the minority voter and me to notice it in
 time, or for more people to start running the patch in #4363 and try to
 catch the bug in action for themselves.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/26485>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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