Ruby selenium ブラウザ起動後、スクレイピングの最中に切断される

■分からないこと
Rubyのseleniumを使ってスクレイピングをしたいのですがブラウザが起動して20件ほどスクレイピングをすると切断されてしまいます。
chromedriverとchromeのバージョンも合っていると思うのですが原因が分かりません。
ご教授いただけると助かります。

■エラー内容

 Connection refused - connect(2) for "127.0.0.1" port 9515 (Errno::ECONNREFUSED)

 Failed to open TCP connection to 127.0.0.1:9515 (Connection refused - connect(2) for "127.0.0.1" port 9515) (Errno::ECONNREFUSED)

■chromedriver

$ which chromedriver
/usr/local/bin/chromedriver
$ chromedriver -v
ChromeDriver 79.0.3945.36 (3582db32b33893869b8c1339e8f4d9ed1816f143-refs/branch-heads/3945@{#614})

■chromeバージョン
バージョン: 79.0.3945.79（Official Build）（64 ビット）

■コード

require 'csv'
require 'kconv'
require 'open-uri'
require 'nokogiri'
require 'selenium-webdriver'
require 'byebug'

def get_params(driver,wait)
  begin
    document = Nokogiri::HTML(driver.page_source)
    params = {}

    params['name'] = driver.find_element(xpath: '//*[@id="jsi-content-wrapper"]/div[3]/div[1]/div[2]/div[10]/div/dl[1]/dd/p').text
    if params['name'].include?('(株)')
      params['name'] = document.xpath("//h1").text.gsub('(株)','株式会社').gsub(/[[:space:]]/, '')
    elsif params['name'].include?('(有)')
      params['name'] = document.xpath("//h1").text.gsub('(有)','有限会社').gsub(/[[:space:]]/, '')
    end

    params['url'] = driver.find_element(xpath: '//*[@id="jsi-content-wrapper"]/div[3]/div[1]/div[2]/div[10]/div/dl[4]/dd/a').text
    if params['url'] == nil
      params['url'] = "-"
    end
    params['address'] = driver.find_element(xpath: '//*[@id="jsi-content-wrapper"]/div[3]/div[1]/div[2]/div[10]/div/dl[3]/dd/p').text
    if params['address'] == nil
      params['address'] = "-"
    end

    return params
  rescue => e
    @stdout.fatal(e)
    driver.close
  end
end

def main()
  headers = ['name','url','address']
  @title = 'townwork'
  @time = Time.new.strftime("%Y_%m_%d")
  @filename = "#{@title}_new_#{@time}.csv"
  CSV.open(@filename, "w", write_headers: true) {|csv| csv << headers }
  @stdout.info("#{@title}_new_#{@time}.csv is created")

  options = Selenium::WebDriver::Chrome::Options.new
  options.add_argument('--headless')
  options.add_argument('--window-size=1440,990')
  driver = Selenium::WebDriver.for :chrome, options: options
  wait = Selenium::WebDriver::Wait.new(timeout: 10)

  driver.navigate.to "https://townwork.net/tokyo"
  search = driver.find_element(:xpath, '//*[@id="jsi-search-tab-wrapper"]/ul[1]/li[3]/a')
  search.location_once_scrolled_into_view
  search.click;sleep 2
  occupation = driver.find_element(:xpath, '//*[@id="checkboxfield011"]') #レジャー
  occupation.click;sleep 2
  occu_details_1 = driver.find_element(:xpath, '//*[@id="checkboxfield01110"]') #フロント・受付
  occu_details_2 = driver.find_element(:xpath, '//*[@id="checkboxfield01107"]') #ホテルスタッフ
  occu_details_3 = driver.find_element(:xpath, '//*[@id="checkboxfield01119"]') #ベッドメイキング
  occu_details_4 = driver.find_element(:xpath, '//*[@id="checkboxfield01109"]') #その他宿泊施設業務
  occu_details_1.click;sleep 1
  occu_details_2.click;sleep 1
  occu_details_3.click;sleep 1
  occu_details_4.click;sleep 1
  driver.find_element(:xpath, '//*[@id="jbTypeLmtForm"]/div[2]/div/div/ul[1]/li[1]/div/input').click; sleep 2

  cnt = 0

  100.times do |idx|
    links = driver.find_elements(xpath: '//*[@id="jsi-content-wrapper"]/div[1]/div[2]/div/div/a/div/div/div[2]/p')

    links.each do |link|
      begin
        # link.location_once_scrolled_into_view
        # wait.until { link.displayed? }

        driver.action.key_down(:command).click(link).perform

        window = driver.window_handles.last
        driver.switch_to.window(window)

        wait.until {driver.find_element(xpath: '//*[@id="jsi-content-wrapper"]/div[3]/div[1]/div[2]/div[10]/div/dl[3]/dd/p').displayed?}
        wait.until {driver.find_element(xpath: '//*[@id="jsi-content-wrapper"]/div[3]/div[1]/div[2]/div[10]/div/dl[4]/dd/a').displayed?}

        params = get_params(driver,wait)
        if params.nil?
          @stdout.fatal("params is nil")
          next
        end
      rescue => e
        @stdout.fatal(e)
        #元のページに戻る
        driver.close
        driver.switch_to.window(driver.window_handles.first)
        next
      end

      driver.close
      driver.switch_to.window(driver.window_handles.first)

      @stdout.info("working on #{params['name']} count #{cnt}")
      cnt = cnt + 1

      CSV.open(@filename, "a", write_headers: true) do |csv|
        csv << [params['name'],params['url'],params['address']]
      end
    end

    if driver.find_elements(xpath: '//*[@id="jsi-content-wrapper"]/div[1]/div[2]/div[39]/div/div[3]/div/a').size > 0
      driver.find_element(xpath: '//*[@id="jsi-content-wrapper"]/div[1]/div[2]/div[39]/div/div[3]/div/a').location_once_scrolled_into_view
      driver.find_element(xpath: '//*[@id="jsi-content-wrapper"]/div[1]/div[2]/div[39]/div/div[3]/div/a').click
    else
      driver.quit
    end
  end

end



if __FILE__ == $0
  @stdout = Logger.new(STDOUT)

  @stdout.info('process started')
  main()
  @stdout.info('process finished')
end