AgitatedDove14 - this was an interesting one. I think I have found the issue, but verifying the fix as of now.

One of the devs was using shutil.copy2 to copy parts of dataset to a temporary directory in a with block - something like:

with TemporaryDirectory(dir=temp_dir) as certificates_directory: for file in test_paths: shutil.copy2(f"{dataset_local}/{file}", f"{certificates_directory}/file")
My suspicion is since copy2 copies with full data and symlinks, it’s messing with the way clearml-data sets up datasets with symlinks to parents etc and when the temp directories are cleaned due to the with blocks the local copies are cleared too