Issue Summary

When an artifact upload from the runner or cloud agent fails and is retried (due to exponential backoff), on retry the operation can fail.

Uploading artifacts involves several steps:

• Register an upload with the media backend
• Upload the data
• Convert the upload to a file once all data has been uploaded
• Delete the upload

We've identified that when step 3 above fails due to a comms error and is retried, the pipelines step will error.

Steps to Reproduce

Difficult to reproduce, the easiest way is to use a man in the middle proxy to cause http traffic to be interrupted.

Expected Results

When interruption occurs during artifact uploads, the runner or cloud agent should be able to retry the upload automatically, without any user intervention.

Actual Results

The step will error with the message "Error occurred whilst processing an artifact"

Workaround

No work around, the step must be re-run.