[tor-bugs] #17147 [Tor]: long-running client path-selection not seeing some (fast) exit nodes

["Tor Bug Tracker & Wiki" <blackhole@xxxxxxxxxxxxxx>]

#17147: long-running client path-selection not seeing some (fast) exit nodes
-----------------------+-------------------------------
 Reporter:  starlight  |          Owner:
     Type:  defect     |         Status:  new
 Priority:  normal     |      Milestone:
Component:  Tor        |        Version:  Tor: 0.2.6.10
 Keywords:             |  Actual Points:
Parent ID:             |         Points:
-----------------------+-------------------------------
 I noticed that a couple of fast new exit relays
 were never being chosen, which is strange
 because with an exit probability of over 1%
 that should happen once in awhile.

 Then used `setconf ExitNodes=` to force one
 of them and the client balked, saying

 {{{
 All routers are down or won't exit -- choosing a doomed exit at random.
 No specified exit routers seem to be running: can't choose an exit.
 Failed to choose an exit server
 }}}

 Then restarted the client and it worked.

 Client was running uninterrupted for 10 days when this occurred.

 `torrc` specifies `UseMicrodescriptors 0` (due to various
 other misbehaviors related to running with micro-descriptors
 enabled.

 This appears to be an area in need of QA work.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/17147>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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