Error Message "Network is unreachable" Displayed in Logs

Symptom

'OSError: [Errno 101] Network is unreachable'

Possible Causes

For security purposes, ModelArts internal training nodes are not allowed to access the Internet.

Solution

1. Change the pretrained value to False, download the pre-trained model, and load the path to this model.

   import torch
   import torchvision.models as models
   
   model1 = models.resnet34(pretrained=False, progress=True)
   checkpoint = '/xxx/resnet34-333f7ec4.pth'
   state_dict = torch.load(checkpoint)
   model1.load_state_dict(state_dict)

2. Use the local PyCharm to remotely access notebook for debugging.

Summary and Suggestions

Before creating a training job, use the ModelArts development environment to debug the training code to maximally eliminate errors in code migration.