[tor-bugs] #7157 [Tor]: "Low circuit success rate %u/%u for guard %s=%s."

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#7157: "Low circuit success rate %u/%u for guard %s=%s."
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 Reporter:  arma                         |          Owner:                    
     Type:  enhancement                  |         Status:  needs_review      
 Priority:  normal                       |      Milestone:  Tor: 0.2.4.x-final
Component:  Tor                          |        Version:                    
 Keywords:  tor-client, MikePerry201210  |         Parent:                    
   Points:                               |   Actualpoints:  8                 
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Comment(by mikeperry):

 Replying to [comment:6 mikeperry]:
 > I appear to have found at least one bug in testing so far: There appears
 to be a discrepancy between the PathBias timeout counting and the CBT
 right-censored CircuitBuildAbandonedCount values..
 >
 > I think the error is in circuit_expire_building() and the difference
 between the calls to circuit_build_times_count_close() and
 pathbias_count_timeout().. I still haven't fully conceptualized all of the
 various cases of circuit_expire_building() though. Man is it a hairy mess.
 :/

 This discrepancy turns out to be due to the hidden service cases in that
 function. There is no discrepancy for normal exit circuits.. It also is
 likely the source of potentially deeper issues with proper timeout usage
 for hidden service circuits...

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/7157#comment:8>
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