Question about torchvision.io.decode_image
Open
Nobody has claimed this yet.
awaiting response
module: io
needs reproduction
- Dominant language
- Python
- Stars
- 17.9k
- Forks
- 7.3k
- Avg merge
- 1d 15h
- Merged PRs (30d)
- 13
Description
when we use torchvision.io.decode_image(img,device = local_rank) to train with ddp，we find num_workers>0 can't work.
RuntimeError: DataLoader worker (pid 58353) exited unexpectedly with exit code 1. Details are lost due to multiprocessing. Rerunning with num_workers=0 may give better error trace.
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reproducing the torchvision.io.decode_image call under DDP with device=local_rank and DataLoader num_workers>0. Rerun with num_workers=0 to obtain the detailed traceback, then compare the worker behavior. Done means identifying and resolving the worker failure while preserving multi-worker DDP loading.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- python, pytorch
- Domain
- computer-vision, distributed-systems
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100