[tor-bugs] #7341 [Tor]: circuit_expire_building applies CBT in twisted ways on hidden service circuits

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#7341: circuit_expire_building applies CBT in twisted ways on hidden service
circuits
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 Reporter:  mikeperry  |          Owner:     
     Type:  defect     |         Status:  new
 Priority:  normal     |      Milestone:     
Component:  Tor        |        Version:     
 Keywords:             |         Parent:     
   Points:             |   Actualpoints:     
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Comment(by mikeperry):

 Some notes of interest from the event logs rransom suggested:

 1. The cannibalization situation is even worse than the inappropriate
 short-timeout application I noted above. If a circuit is cannibalized, we
 never update the creation timer. This means that if a circuit lies idle
 for any amount of time, it will instantly time out when it is
 cannibalized.

 2. There is a full second local delay between the point where a HS intro
 circuit completes and the point where we attempt to send INTRODUCE1.
 Possibly due to a 1/sec libevent loop that drives HS creation? That would
 be sad.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/7341#comment:6>
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