[tor-bugs] #8387 [Tor]: Unbuilt one-hop circuits sometimes hang around forever

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#8387: Unbuilt one-hop circuits sometimes hang around forever
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 Reporter:  mikeperry   |          Owner:  mikeperry         
     Type:  defect      |         Status:  assigned          
 Priority:  normal      |      Milestone:  Tor: 0.2.4.x-final
Component:  Tor         |        Version:                    
 Keywords:  tor-client  |         Parent:                    
   Points:              |   Actualpoints:                    
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Comment(by mikeperry):

 I think what I am asking is for a way to create a bunch of circuits
 (perhaps with a wget loop plus MaxCircuitDirtiness 10) over a long period
 of time, and spit out an alert if any currently unused circuits are older
 than an hour.

 I'm not sure how far along our stem-based integration testing plan is, but
 this is something that I think we should eventually include in that test
 suite. Nick has previously pointed out that circuit_expire_building (our
 circuit timeout function) is the 11th most cyclomatically complex
 functions in tor-core, and we have a few other bugs like this that smell a
 lot like timeout-related issues...

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/8387#comment:4>
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