End of Life Ruby 3.1 has reached end of life and gets no more fixes. Switch to Ruby 4.0 →

instance method

Resolv::DNS#close

# File tmp/rubies/ruby-3.1.3/lib/resolv.rb, line 363
def close
  @mutex.synchronize {
    if @initialized
      @initialized = false
    end
  }
end

Closes the DNS resolver.

See also .open #each_address .new #each_name also in 4.1 · 4.0 · 3.4 · 3.3 · 3.2 · 3.0