#8387: Unbuilt one-hop circuits sometimes hang around forever
-------------------------------------------------+-------------------------
 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 arma):

 {{{
 Jan 27 00:07:39.416 [notice] Tor 0.4.0.1-alpha (git-77712a5fa29f135e)
 running on Linux with Libevent 2.1.8-stable, OpenSSL 1.1.1a, Zlib 1.2.11,
 Liblzma N/A, and Libzstd N/A.
 [...]
 Jan 27 18:07:40.446 [notice] Heartbeat: Tor's uptime is 18:00 hours, with
 0 circuits open. I've sent 315 kB and received 2.75 MB.
 Jan 27 23:02:41.006 [notice] No user activity in a long time: becoming
 dormant.
 Jan 28 00:07:40.544 [notice] Heartbeat: Tor's uptime is 22:55 hours, with
 1 circuits open. I've sent 361 kB and received 4.01 MB.
 Jan 28 00:07:40.544 [notice] Diagnostic for issue 8387: Found 1 one-hop
 circuits more than 1800 seconds old! Logging 1...
 Jan 28 00:07:40.544 [notice]   #0 created at 2019-01-27 22:55:41. open,
 General-purpose client. Not marked for close. Package window: 1000. usable
 for new conns. Dirty since 2019-01-27 22:55:42 (4318 seconds vs 600-second
 cutoff).
 Jan 28 00:07:40.544 [notice] It has been 3906 seconds since I last called
 circuit_expire_old_circuits_clientside().
 Jan 28 06:07:40.640 [notice] Heartbeat: Tor's uptime is 22:55 hours, with
 1 circuits open. I've sent 361 kB and received 4.05 MB.
 Jan 28 06:07:40.640 [notice] Diagnostic for issue 8387: Found 1 one-hop
 circuits more than 1800 seconds old! Logging 1...
 Jan 28 06:07:40.640 [notice]   #0 created at 2019-01-27 22:55:41. open,
 General-purpose client. Not marked for close. Package window: 1000. usable
 for new conns. Dirty since 2019-01-27 22:55:42 (25918 seconds vs
 600-second cutoff).
 Jan 28 06:07:40.640 [notice] It has been 25506 seconds since I last called
 circuit_expire_old_circuits_clientside().
 }}}

 Running as just a standard client.

 For extra fun, I seem to still have an OR connection open, and be sending
 / receiving keepalive cells on it. Even though Tor said it was going
 dormant, is surprised that it still has a circuit open, etc.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/8387#comment:67>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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