[tor-bugs] #8387 [Core Tor/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:  nickm
     Type:  defect                               |         Status:  new
 Priority:  High                                 |      Milestone:  Tor:
                                                 |  unspecified
Component:  Core Tor/Tor                         |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  tor-client, 2016-bug-retrospective,  |  Actual Points:
  needs-insight needs-analysis maybe-logs-       |
  would-help                                     |
Parent ID:                                       |         Points:
 Reviewer:                                       |        Sponsor:
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Comment (by cypherpunks):

 I use tor just as client (not a relay, not a HS service). Recently during
 my work with some HS I got it (linux, 64 bit, 0.3.1.9):

 {{{
 Dec 06 02:03:03.000 [notice] Heartbeat: Tor's uptime is XX:XX hours, with
 XX circuits open. I've sent XX.XX MB and received XX.XX GB.
 Dec 06 02:03:03.000 [notice] Average packaged cell fullness: 65.XXX%. TLS
 write overhead: 4%
 Dec 06 02:03:03.000 [notice] Diagnostic for issue 8387: Found 1 one-hop
 circuits more than 1800 seconds old! Logging 1...
 Dec 06 02:03:03.000 [notice]   #0 created at 2017-12-06 01:10:06. open,
 General-purpose client. Not marked for close. Package window: 1000. usable
 for new conns. Dirty since 2017-12-06 01:56:04 (4XX seconds vs 600-second
 cutoff).
 Dec 06 02:03:03.000 [notice] It has been 2 seconds since I last called
 circuit_expire_old_circuits_clientside().
 }}}

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/8387#comment:63>
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