[bug] v4.3.1: Unexpected token '<', "<!DOCTYPE "... is not valid JSON

[knkarlsson]

What happened?

Intermittent failures when uploading artifacts using
uses: actions/upload-artifact@5d5d22a31266ced268874388b861e4b58bb5c2f3 #version 4.3.1

The errors we have seen (in different builds):

Error: Failed to FinalizeArtifact: Unexpected token '<', "<!DOCTYPE "... is not valid JSON
Error: Failed to CreateArtifact: Unexpected token '<', "<!DOCTYPE "... is not valid JSON

What did you expect to happen?

Successful upload of artifacts

How can we reproduce it?

Not sure, these are intermittent errors for us, seen only a couple of times since we started using v4 about 2 weeks ago. The workflows in our project do a few hundreds of similar uploads per day, most of the time without problem.

Anything else we need to know?

The artifacts that were failed to be uploaded were just a couple of small files.

What version of the action are you using?

version 4.3.1

What are your runner environments?

linux

Are you on GitHub Enterprise Server? If so, what version?

No response

[codespearhead]

For reference: keycloak/keycloak#27692

[sa1g0n1337]

same issue here

[trym-b]

I also just encountered this issue with this workflow run: https://github.com/nlnwa/warchaeology/actions/runs/8449566338/job/23143911184#step:11:14
Re-triggering the workflow run made the workflow green again.

The relevant part of the log is:

##[group]Run actions/upload-artifact@v4
with:
  name: deb-amd64
  path: dist/warchaeology_*amd64.deb
  if-no-files-found: warn
  compression-level: 6
  overwrite: false
env:
  flags: --snapshot
##[endgroup]
With the provided path, there will be 1 file uploaded
Artifact name is valid!
Root directory input is valid!
##[error]Failed to CreateArtifact: Unexpected token '<', "<!DOCTYPE "... is not valid JSON
Post job cleanup.

[markmssd]

Also encountering the issue, here's a screenshot of it if that helps:

[kisPocok]

Same issue here. We have recently migrated to v4.3.1