Creating a Dataset in OCI Data Labeling fails with “Content-Type Validation failed” error

I ran into an issue recently with OCI Data Labelling, Generate records was failing with the following error: Content-Type Validation Failed ❌.

I was using data labeling to label some images that I was going to use to train a custom AI vision classification model.

In my specific case, the dataset comprised images stored in an OCI Object Storage bucket. I had uploaded the images to the bucket using the OCI CLI, specifically the following command which uploaded all files within a specific directory on my local machine to a named bucket:

oci os object bulk-upload --bucket-name Pneumonia-Images --src-dir "/Users/bkgriffi/OneDrive/Development/train/PNEUMONIA"

A helpful colleague advised me to manually set the content type at upload to image/jpeg, below is the updated command that I run that uploads the images and sets the correct content type.

oci os object bulk-upload --bucket-name Pneumonia-Images --src-dir "/Users/bkgriffi/OneDrive/Development/train/PNEUMONIA" --overwrite --content-type image/jpeg

Once I’d done this, records generated successfully ✅.