Help Center/ ModelArts/ Troubleshooting/ Training Jobs/ Internet Access Issues/ Error Message "Network is unreachable" Displayed in Logs
Updated on 2022-12-08 GMT+08:00
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Error Message "Network is unreachable" Displayed in Logs

Symptom

When PyTorch is used, the following error message will be displayed in logs after pretrained in torchvision.models is set to True: 
'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.
Parent topic: Internet Access Issues