[tor-bugs] #31425 [Circumvention/Snowflake]: Snowflake broker is sluggish and sometimes fails

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#31425: Snowflake broker is sluggish and sometimes fails
-----------------------------------------+--------------------
     Reporter:  cohosh                   |      Owner:  (none)
         Type:  defect                   |     Status:  new
     Priority:  Very High                |  Milestone:
    Component:  Circumvention/Snowflake  |    Version:
     Severity:  Normal                   |   Keywords:  broker
Actual Points:                           |  Parent ID:
       Points:                           |   Reviewer:
      Sponsor:                           |
-----------------------------------------+--------------------
 This morning while trying to deploy a change I noticed that my SSH
 connection is extremely sluggish.

 I'm also getting a lot of timeouts at the client:
 {{{
 2019/08/16 15:37:54 Negotiating via BrokerChannel...
 Target URL:  snowflake-broker.azureedge.net
 Front URL:   ajax.aspnetcdn.com
 2019/08/16 15:38:05 BrokerChannel Response:
 504 Gateway Timeout

 2019/08/16 15:38:05 BrokerChannel Error: Unexpected error, no answer.
 2019/08/16 15:38:05 Failed to retrieve answer. Retrying in 10 seconds
 }}}

 Some requests go through, but the timeouts seem to be occurring more
 frequently. At first glance, this doesn't seem to be a CPU or memory
 resources consumption problem. Maybe there's a data transfer limit we're
 hitting?

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/31425>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
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