[tor-bugs] #21394 [Core Tor/Tor]: connection timeouts are affecting Tor Browser usability

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#21394: connection timeouts are affecting Tor Browser usability
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 Reporter:  arthuredelstein                      |          Owner:  (none)
     Type:  defect                               |         Status:  new
 Priority:  Very High                            |      Milestone:  Tor:
                                                 |  0.3.2.x-final
Component:  Core Tor/Tor                         |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  tbb-performance, tbb-usability,      |  Actual Points:
  performance                                    |
Parent ID:                                       |         Points:
 Reviewer:                                       |        Sponsor:
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Comment (by teor):

 Replying to [comment:18 cypherpunks]:
 > {{{
 > [08-04 17:35:24] Torbutton INFO: controlPort >> 650 STREAM 6240 DETACHED
 798 trac.torproject.org:443 REASON=TIMEOUT
 > [08-04 17:35:31] Torbutton INFO: controlPort >> 650 STREAM 6240 DETACHED
 802 trac.torproject.org:443 REASON=END REMOTE_REASON=RESOLVEFAILED
 > [08-04 17:35:32] Torbutton INFO: controlPort >> 650 STREAM 6241 DETACHED
 798 trac.torproject.org:443 REASON=TIMEOUT
 > [08-04 17:35:34] Torbutton INFO: controlPort >> 650 STREAM 6241 REMAP
 804 [2a01:4f8:172:39ca:0:dad3:3:1]:443 SOURCE=EXIT
 > }}}
 > It looks like trac.tpo is always resolved as IPv6 address, and Tor
 switches through the exit nodes until one with IPv6 support found.

 #21310 and #21311 may fix this, but we might also need a fix on the client
 side.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/21394#comment:19>
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