RuntimeError on PDf Generation

[mcieaaka]

Can anybody help me to figure out, Why am I facing this issue, and what might be the fix for the same?

Issue description

While trying to generate PDF in my Rails App, I randomly get this error, but unable to recreate or figure out why this is happening

Here is the error:

Failed to execute:
["/usr/local/bundle/bin/wkhtmltopdf", "--encoding", "UTF-8", "--enable-local-file-access", "--margin-bottom", "4", "--margin-left", "0", "--margin-right", "0", "--header-html", "file:////tmp/wicked_header_pdf20240423-3535-73r70r.html", "--footer-html", "file:////tmp/wicked_footer_pdf20240423-3535-vhx6uw.html", "file:////tmp/wicked_pdf20240423-3535-4x7ecq.html", "/tmp/wicked_pdf_generated_file20240423-3535-6n8vuc.pdf"]
Error: PDF could not be generated!
 Command Error: Loading pages (1/6)
[>                                                           ] 0%
[======>                                                     ] 10%
Error: Failed to load file:////tmp/wicked_header_pdf20240423-3535-73r70r.html, with network status code 203 and http status code 0 - Error opening //tmp/wicked_header_pdf20240423-3535-73r70r.html: No such file or directory
Error: Failed loading page file:////tmp/wicked_header_pdf20240423-3535-73r70r.html (sometimes it will work just to ignore this error with --load-error-handling ignore)
Exit with code 1 due to network error: ContentNotFoundError

Before this, I was getting same error, but the message included: "Blocked Access", I tried adding --enable-local-file-access after which I am getting this new error.

System specifications

wicked_pdf gem version:
2.6.3

whtmltopdf provider gem and version if one is used:
https://rubygems.org/gems/wkhtmltopdf-binary
0.12.6

platform/distribution and version:
Ubuntu 20.04

[unixmonkey]

Error opening //tmp/wicked_header_pdf20240423-3535-73r70r.html: No such file or directory

Either your TMP directory is becoming non-writable at times, or something is clearing out tmp files before the process that needs them is done.

Do you have a recurring job or deploy process that empties the tmp dir?

Are you holding a separate reference to the header from one PDF generation, and trying to use it for a second one?

Sorry I don't have an answer on this. I'm just hoping maybe I can help you figure out what's happening on your end.

[jaredholdcroft]

@mcieaaka Hey. Apologies to bump this so late but did ever figure this out?

[ps-ruby-aoka]

RuntimeError Failed to execute: ["/opt/render/project/.gems/bin/wkhtmltopdf", "--zoom", "1", "--margin-top", "20mm", "--margin-bottom", "20mm", "--footer-right", "City Of Boyd", "--footer-font-size", "7", "file:////tmp/wicked_pdf20250311-101-wjgt9.html", "/tmp/wicked_pdf_generated_file20250311-101-1vmggsp.pdf"] Error: PDF could not be generated! Command Error: Loading pages (1/6) [> ] 0% [======> ] 10%

I am also facing same issue randomly

[unixmonkey]

@ps-ruby-aoka Looks like wkhtmltopdf couldn't load all the pages of your HTML document. Is it randomly for the same document?

I suspect the problem could be remote loading resources in that HTML; if it takes too long this can time out.
Alternately, it could be consuming more memory than is available to the process.

Just a guess, but maybe it could help.

[ps-ruby-aoka]

@ps-ruby-aoka Looks like wkhtmltopdf couldn't load all the pages of your HTML document. Is it randomly for the same document?

I suspect the problem could be remote loading resources in that HTML; if it takes too long this can time out. Alternately, it could be consuming more memory than is available to the process.

Just a guess, but maybe it could help.

Thanks for respond @unixmonkey

It is occurring for some documents usually with many images.

What could be the possible solution?

[unixmonkey]

Thanks for respond @unixmonkey

It is occurring for some documents usually with many images.

What could be the possible solution?

If the image is in the tempfile like <img src="https://example.com/img1.jpg">, try instead to download it to the local filesystem as a Tempfile, and reference it like <img src="file:///path/to/tmpfile.jpg">, this is what the wicked_pdf_image_tag helper tries to do if the image is in the asset pipeline, but if it is not, you may have to solve it on your own.

If the images are very large, you can try resampling them to something smaller before trying to PDF them, but this will also make it take much longer to generate a PDF, but if it's in a background job, that's not so bad.

Or you can try adding more memory to your server that runs the wkhtmltopdf process, or use a 3rd-party service like DocRaptor to offload the PDF generation to someone else with a beefier server for this purpose (which also uses PrinceXML instead of wkhtmltopdf, which has it's own benefits).

Good luck!

[ps-ruby-aoka]

Thanks for respond @unixmonkey
It is occurring for some documents usually with many images.
What could be the possible solution?

If the image is in the tempfile like <img src="https://example.com/img1.jpg">, try instead to download it to the local filesystem as a Tempfile, and reference it like <img src="file:///path/to/tmpfile.jpg">, this is what the wicked_pdf_image_tag helper tries to do if the image is in the asset pipeline, but if it is not, you may have to solve it on your own.

If the images are very large, you can try resampling them to something smaller before trying to PDF them, but this will also make it take much longer to generate a PDF, but if it's in a background job, that's not so bad.

Or you can try adding more memory to your server that runs the wkhtmltopdf process, or use a 3rd-party service like DocRaptor to offload the PDF generation to someone else with a beefier server for this purpose (which also uses PrinceXML instead of wkhtmltopdf, which has it's own benefits).

Good luck!

I am able to solve the issue by adding more memory to the server.

Thank You 👍