GitHub Actions unable to install Java due to problems with Cloudflare CDN

[Soroosh129]

I have been getting the following error fairly regularly:

Generally, re-running the CI fixes this issue.

Here is an example of a failing task: https://github.com/lf-lang/lingua-franca/runs/6613476780?check_suite_focus=true#step:3:21

[petervdonovan]

I have the same issue in the vscode-lingua-franca repo, only on MacOS. I suspect the problem is unrelated to anything we have done. Surprisingly, I have not seen any relevant bug reports here, though.

[Soroosh129]

It looks like an unexpected CloudFlare HTML file is being downloaded instead of the actual thing:

To get the above, I copied the output of the CI task into a .html file and opened it in a browser.

[lhstrh]

I saw a commit from @petervdonovan that attempted to address this issue by choosing a different Java distribution? Did it work?
ff8996

[petervdonovan]

Did it work?

No, it did not work. It did not work to revert to an older setup-java version, either.

[Soroosh129]

There are other distributions to try.
Is it worth playing around with these? Perhaps one of these is not using CloudFlare.