[tor-bugs] #25344 [Obfuscation/Snowflake]: proxy-go needs to relax between polls

Tor Bug Tracker & Wiki blackhole at torproject.org
Thu Mar 22 02:23:05 UTC 2018


#25344: proxy-go needs to relax between polls
-----------------------------------+------------------------
 Reporter:  dcf                    |          Owner:  (none)
     Type:  defect                 |         Status:  new
 Priority:  Medium                 |      Milestone:
Component:  Obfuscation/Snowflake  |        Version:
 Severity:  Normal                 |     Resolution:
 Keywords:                         |  Actual Points:
Parent ID:                         |         Points:
 Reviewer:                         |        Sponsor:
-----------------------------------+------------------------

Comment (by dcf):

 #23356 shows the consequence if proxy-go gets into a tight loop of
 connection failures.
 > A power outage disconnected the network of a laptop on which I was
 running proxy-go. The laptop battery kept the computer running until the
 power came back on, but the network was still down. When I checked on it,
 the log was filled with 2.4 GB of
 > {{{
 > 2017/08/29 10:02:33 error polling broker: Post https://snowflake-
 reg.appspot.com/proxy: dial tcp: lookup snowflake-reg.appspot.com on <dns
 server>:53: dial udp <dns server>:53: connect: network is unreachable
 > 2017/08/29 10:02:33 error polling broker: Post https://snowflake-
 reg.appspot.com/proxy: dial tcp: lookup snowflake-reg.appspot.com on <dns
 server>:53: dial udp <dns server>:53: connect: network is unreachable
 > 2017/08/29 10:02:33 error polling broker: Post https://snowflake-
 reg.appspot.com/proxy: dial tcp: lookup snowflake-reg.appspot.com on <dns
 server>:53: dial udp <dns server>:53: connect: network is unreachable
 > }}}
 >
 > There were 11,879,088 of these messages over the course of about an hour
 (according to the log timestamps), so about 3,330 messages per second.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/25344#comment:1>
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