Default process group has not been initialized, please make sure to call init_process_group

torch.package / torch::deploy
1

line 140, in initialize_model
model = nn.parallel.DistributedDataParallel(model)
File “/opt/miniconda/lib/python3.8/site-packages/torch/nn/parallel/distributed.py”, line 530, in init
self.process_group = _get_default_group()
File “/opt/miniconda/lib/python3.8/site-packages/torch/distributed/distributed_c10d.py”, line 410, in _get_default_group
raise RuntimeError(
RuntimeError: Default process group has not been initialized, please make sure to call init_process_group.