# File lib/dnsruby/recursor.rb, line 381
    def Recursor.clear_caches(resolver = Resolver.new)
      resolver.dnssec = @dnssec
      Recursor.set_hints(Hash.new, resolver)
      @@zones_cache = Hash.new # key zone_name, values Hash of servers and AddressCaches
      @@zones_cache["."] = @@hints

      @@authority_cache = Hash.new
    end