[tor-bugs] #24712 [Core Tor/Tor]: Client builds and timeouts tons of circs to connect to HS

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#24712: Client builds and timeouts tons of circs to connect to HS
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 Reporter:  asn                  |          Owner:  (none)
     Type:  defect               |         Status:  new
 Priority:  Medium               |      Milestone:  Tor: 0.3.3.x-final
Component:  Core Tor/Tor         |        Version:
 Severity:  Normal               |     Resolution:
 Keywords:  tor-hs, performance  |  Actual Points:
Parent ID:                       |         Points:  2
 Reviewer:                       |        Sponsor:
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Comment (by arma):

 Replying to [comment:1 asn]:
 > In general, it seems like we are way too aggressive in timing out HS
 circuits and popping up new ones. For example see `3209247593` which is
 the first rend circ we ever cannibalized at `14:18:55` getting timed out
 after 4 seconds:

 Sounds like your circuitbuildtimeout was 4 seconds.

 I wonder if your Tor should be recognizing that its cbt is wrong after
 this many failures. Do failures of this kind of circuit contribute towards
 Tor deciding that its cbt is too low? We should look for edge cases where
 the cbt can be too low yet some kinds of circuit failures don't contribute
 toward resetting it.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/24712#comment:2>
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