[tor-bugs] #18580 [Tor]: exit relay fails with 'unbound' DNS resolver when lots of requests time-out

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#18580: exit relay fails with 'unbound' DNS resolver when lots of requests time-out
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 Reporter:  Dhalgren  |          Owner:
     Type:  defect    |         Status:  new
 Priority:  Medium    |      Milestone:
Component:  Tor       |        Version:  Tor: 0.2.7.6
 Severity:  Major     |     Resolution:
 Keywords:            |  Actual Points:
Parent ID:            |         Points:
 Reviewer:            |        Sponsor:  None
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Comment (by arma):

 So to summarize, it sounds like unbound's behavior when doing a dns
 resolve is more aggressive than named's behavior? And Godaddy has some
 sort of abuse detection mechanism that makes it refuse to answer dns
 questions from loud IP addresses? And whatever unbound is doing is more
 often triggering godaddy's mechanism?

 And while some people on tor-relays thought that this was maybe a Tor bug,
 it *can't* be a Tor bug if the issue is "the dns server you're asking
 questions to won't answer"? Or is there still a Tor bug here too, where
 Tor should handle it better when it doesn't get any dns answer?

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/18580#comment:5>
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