Empty list of splits on config-split-names

[AndreaFrancis]

We have some entries with empty splits:

Atlas atlas-x5jgb3-shard-0 [primary] datasets_server_cache> db.cachedResponsesBlue.countDocuments({kind:"config-split-names", http_status:200, "content.splits":{ $exists: true, $size: 0}})
97

Note that the viewer for these datasets always shows: Error code: ConfigNotFound
Like https://huggingface.co/datasets/Vinay573/aarkoocustomdataset

But, when using the datasets library, it is possible to get the dataset split:

This issue is due because we first load splits from config-info and then from streaming, but if config-info is empty, it will store no splits.
Should we throw an error if the splits list is empty?

[severo]

Yes, sure, it does not make sense for the dataset viewer to process a dataset without splits. Better to raise an error