net_persistent.rb

#
# Re-opening Net::HTTP::Persistent to add a shutdown_in_all_threads method.
#
class Net::HTTP::Persistent

  #
  # Shuts down all connections in a thread.
  #
  # Uses this thread by default
  #
  def shutdown(thread = Thread.current)
    connections = thread[@connection_key]

    connections.each do |_, connection|
      begin
        connection.finish
      rescue IOError
      end
    end if connections

    thread[@connection_key] = nil
    thread[@request_key]    = nil
  end

  # Shuts down this instance's connection in all the threads.
  #
  # (to avoid too many open files issues).
  #
  def shutdown_in_all_threads
    Thread.list.each { |t| shutdown(t) }
  end
end

+1