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[tor-bugs] #28860 [Core Tor/Tor]: Increased DNS failure rate when using ServerDNSResolvConfFile with tor 0.3.4.9 (as opposed to 0.3.3.x)



#28860: Increased DNS failure rate when using ServerDNSResolvConfFile with tor
0.3.4.9 (as opposed to 0.3.3.x)
--------------------+------------------------------
 Reporter:  nusenu  |          Owner:  (none)
     Type:  defect  |         Status:  new
 Priority:  Medium  |      Component:  Core Tor/Tor
  Version:          |       Severity:  Normal
 Keywords:          |  Actual Points:
Parent ID:          |         Points:
 Reviewer:          |        Sponsor:
--------------------+------------------------------
 A major tor exit relay operator reports that
 after upgrading from 0.3.3.x to 0.3.4.9 his DNS failure rate significantly
 increased.

 He also reported that he is observing DNS issues only when using
 ServerDNSResolvConfFile and no problems when not using that config option.
 Using that option worked fine on tor 0.3.3.x



 With ServerDNSResolvConfFile option on 0.3.4.9:
 {{{
 Dec 13 02:39:52.000 [notice] eventdns: Nameserver 8.8.8.8:53 is back up
 Dec 13 02:39:53.000 [warn] eventdns: All nameservers have failed
 }}}

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/28860>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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