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Re: [tor-bugs] #19966 [Core Tor/Tor]: torproxy goes south with more than 1 connection attempt per second to a hidden service

#19966: torproxy goes south with more than 1 connection attempt per second to a
hidden service
-------------------------------------------------+-------------------------
 Reporter:  Alan                                 |          Owner:  (none)
     Type:  defect                               |         Status:  closed
 Priority:  High                                 |      Milestone:  Tor:
                                                 |  0.3.1.x-final
Component:  Core Tor/Tor                         |        Version:  Tor:
                                                 |  0.2.8.6
 Severity:  Major                                |     Resolution:  user
 Keywords:  tor-hs, regression, triage-          |  disappeared
  out-030-201612                                 |  Actual Points:
Parent ID:                                       |         Points:
 Reviewer:                                       |        Sponsor:
-------------------------------------------------+-------------------------

Comment (by damiengray):

 If I initiate onion service connections too rapidly, I see the same error
 progression:

 {{{
 Dec {redacted} [notice] We'd like to launch a circuit to handle a
 connection, but we already have {redacted} general-purpose client circuits
 pending. Waiting until some finish.
 Dec {redacted} [warn] Fetching v2 rendezvous descriptor failed. Retrying
 at another directory.
 Dec {redacted} [warn] Fetching v2 rendezvous descriptor failed. Retrying
 at another directory.
 Dec {redacted} [warn] Fetching v2 rendezvous descriptor failed. Retrying
 at another directory.
 Dec {redacted} [notice] Closing stream for '[scrubbed].onion': hidden
 service is unavailable (try again later).
 Dec {redacted} [notice] Closing stream for '[scrubbed].onion': hidden
 service is unavailable (try again later).
 Dec {redacted} [notice] Tried for 120 seconds to get a connection to
 [scrubbed]:{redacted}. Giving up. (waiting for rendezvous desc)
 Dec {redacted} [notice] Tried for 120 seconds to get a connection to
 [scrubbed]:{redacted}. Giving up. (waiting for rendezvous desc)
 }}}

 I am using Tor version 0.3.4.9 (git-074ca2e0054fded1).

 Is there any fix for this, other than limiting the connection rate?

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/19966#comment:9>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online

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