Lightning-AI / Lightning-AI/pytorch-lightning
Questions about loading a pre-trained model using lightnining CLI for continue training
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- Python
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Description
### Bug description
Hi, I tried to load a pre-trained model using lightnining cli for continue training, which works well for single gpu case. However, for multiple gpu case, I meet a bug in the optimization process:
RuntimeError: !tensors.empty() INTERNAL ASSERT FAILED at "/opt/conda/conda-bld/pytorch_1712608853085/work/torch/csrc/distributed/c10d/reducer.cpp":2090, please report a bug to PyTorch.
In both rank 0 and rank 1 gpu cores. How to properly load models for multi gpu training with the help of cli? Thanks.
### What version are you seeing the problem on?
master
### How to reproduce the bug
```python
Please see the questions above.
```
### Error messages and logs
```
# Error messages and logs here please
```
### Environment
Current environment
```
#- PyTorch Lightning Version (e.g., 2.4.0):
#- PyTorch Version (e.g., 2.4):
#- Python version (e.g., 3.12):
#- OS (e.g., Linux):
#- CUDA/cuDNN version:
#- GPU models and configuration:
#- How you installed Lightning(`conda`, `pip`, source):
```
### More info
Nope
cc @mauvilsa
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 Lightning CLI pretrained-model loading flow with multiple GPUs, using the complete PyTorch, Lightning, CUDA, OS, and GPU environment details that are missing from the report. Compare it with the working single-GPU case and determine what is needed for continued training to complete without the PyTorch distributed reducer assertion.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- python, pytorch
- Domain
- cli, distributed-systems, machine-learning
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 18/100