Streaming hangs at 0% since June 3, 2026
#3
by LH-Tech-AI - opened
Hi,
Since today (June 3, 2026), streaming from dclm-edu hangs indefinitely at 0% with no error and no timeout. The same code worked fine last week.
Minimal reproduction:
from datasets import load_dataset
ds = load_dataset("HuggingFaceTB/dclm-edu", split="train", streaming=True)
print(next(iter(ds))) # hangs here forever
What happens:
Feeding DCLM (10%): 0%| | 0/5000 [00:00<?, ?it/s]
No exception is raised, the process just stalls silently.
What does NOT hang:
HuggingFaceTB/smollm-corpus(cosmopedia-v2) ✅HuggingFaceFW/fineweb-edu(sample-10BT) ✅
Both work fine in the same script, in the same session — only dclm-edu hangs.
Also tried:
- Loading via
parquet+hf://path directly → same hang - Clearing the HF cache → no change
Environment:
datasetsversion: 4.8.5- OS: Linux
- Confirmed reproducible across multiple runs today AND yesterday!
Could you check if something changed on the dataset/CDN side? Thanks!