Grover::JavaScript::ProtocolError: Network.enable timed out. Increase the 'protocolTimeout' setting in launch/connect calls for a higher timeout if needed.

[JosephTico]

This is a very weird thing, never had any issue related to timeouts until a couple days ago and this has started happening randomly, not every request to Grover does this. Using Alpine 3.20.

My initializer:

# config/initializers/grover.rb
Grover.configure do |config|
  config.options = {
    format: 'letter',
    emulate_media: 'screen',
    margin: {
      top: '1cm',
      bottom: '1cm',
    },
    print_background: true,
    cache: false,
    scale: 0.75
  }
end

I'm using Rails 7.1, Ruby 3.3.3. For Rendering PDFs I use this helper function that renders the action to a string and passes it to Grover.

  def render_pdf(template, disposition: 'inline', filename: 'file')
      send_data(
        Grover.new(
          render_to_string(
            {
              action: action_name.to_s,
              formats: [:pdf],
              template:,
              layout: 'pdf'
            }
          )
        ).to_pdf, disposition:, filename: "#{filename}.pdf", type: 'application/pdf'
      )
  end

Any ideas? Thank you.

[CeeBeeUK]

About to ask the same question... except 100% of our pdf generations are failing

We have spent a few days trying different debugging issues, the only obvious thing to change was chromium incrementing from 126 to 127

On a broken environment, opening node and running

(async () => {
  const puppeteer = require("puppeteer");
  // Launch the browser and open a new blank page
  const browser = await puppeteer.launch({args:['--disable-gpu', '--no-sandbox','--disable-setuid-sandbox']});
  const page = await browser.newPage();
  const version = await page.browser().version();
  console.log("page browser version: " + version);
  await page.goto('https://bbc.co.uk/news');

  console.log("Page title: " + await page.title());

  const element = await page.waitForSelector('h1')
  let value = await element.evaluate(el => el.textContent)
  console.log('h1 = ' + value);

  await browser.close();
})();

returns

page browser version: Chrome/127.0.6533.88
Page title: Home - BBC News
h1 = BBC News

But when I start a rails console and run

Grover.new('test').to_pdf

it will hang and return the error above, but running the same sequence on a working build returns PDF output

The working infrastructure is:
Alpine 3:20
Grover 1.1.9
Puppeteer 22.13.1
Chromium 126.0.6478.182 Alpine Linux

Broken infrastructure:
Alpine 3:20
Grover 1.1.9
Puppeteer 22.13.1
Chromium 127.0.6533.72 Alpine Linux

We have updated a build this morning to use the latest Chromium 127.0.6533.88 Alpine Linux but it is still failing

[JosephTico]

Yeah, it looks like this is a Puppeteer issue with Alpine 3.20's Chromium version.

For now a quick fix is downgrading to Alpine 3.19 as it looks like it's using a different Chromium that is still compatible.

[CeeBeeUK]

I'm not sure it is puppeteer... if you launch puppeteer via node it successfully renders pages

But yes, rolling back to Alpine 3:19 and puppeteer 22.7.1 seems to be our only recourse to get this working

[JosephTico]

I think it could be related to this:

puppeteer/puppeteer#11640 (comment)

The thing making it fail appears to be the --single-process flag which I assume Grover could be setting.

More issues related to this on Puppeteer's repo:

puppeteer/puppeteer#12637
puppeteer/puppeteer#12189

[CeeBeeUK]

I'm having some success with changing my Grover configuration launch_args
from

launch_args: %w[--no-sandbox]

to

launch_args: %w[--disable-gpu --no-sandbox]

My testing is continuing but, so far, it is looking hopeful

[abrom]

Not sure I can add much to this issue, but I'd welcome an update to the README if/when there is a resolution.

As far as I can tell from the discussion above this isn't a Grover issue, but rather a Chrome/Chromium + your environment issue. Grover does not add/inject any launch arguments that you haven't told it to.

Of course, forewarning others about potential configuration mismatches like this would be great.