ImportError: cannot import name 'is_fx_tracing' from 'torch.fx._symbolic_trace'

[Hamad-SS]

Error while running the Official Detectron2 Demo:
yesterday I ran it and it was working fine. Today, it is giving me error. Run code cell # 3 from the top. Where importing libraries. It gives error after the comment
# import some common detectron2 utilities
Link to the Cell:
https://colab.research.google.com/drive/16jcaJoc6bCFAQ96jDe2HwtXj7BMD_-m5#scrollTo=ZyAvNCJMmvFF
It gives error on running the following line
from detectron2 import model_zoo
but if you comment above line, it gives same error on next line i.e.,
from detectron2.engine import DefaultPredictor

Error is
ImportError: cannot import name 'is_fx_tracing' from 'torch.fx._symbolic_trace' (/usr/local/lib/python3.7/dist-packages/torch/fx/_symbolic_trace.py)

it is easily reproduceable as it is given by default notebook. Opened a fresh one from the link given on following page
https://github.com/facebookresearch/detectron2
Still the same error.
Someone maybe pushed something in last 24 hours that made it give this error.

[jongwook-Han]

I'm having the same issue :(

[Deam0on]

Same issue. Any solution?

[truong-xuan-linh]

Same issue :((

[pietro-nardelli]

Same issue, yesterday it worked with no errors.

[frozen-mind]

same error on colab...
hope someone can solve this problem ASAP...

[truong-xuan-linh]

!!!
You can temporary fix this issue on colab by:

1. Open poolers.py source code
   

2. Comment line 10, 223->237
   
   

3. Restart runtime
   

4. Then run code ( but not run "!python -m pip install 'git+https://github.com/facebookresearch/detectron2.git'
   " again ).

Its work for me, but i think it just temporary solution.

[Deam0on]

Thank you

[leoliu37]

This is the problem of detecron2 version, I solve it by installing suitable version in https://github.com/facebookresearch/detectron2/releases

[juanluisrosaramos]

Same problem here, I tried very different combinations of torch, none of them works

[frozen-mind]

@leoliu37 could you please tell me which version did you installed exactly?

[Hamad-SS]

@truong-xuan-linh hmm... dirty solution.
But I'll take it! It works!

[mahachaaben99]

heey guys unfortunately im not having exactly the same error as you

[mahachaaben99]

anyone can help with it ? i tried commenting the code lines in poolers.py but the issue was not fixed

[juanluisrosaramos]

@maziqueen79 I had the same error problem with this installation

!pip uninstall torch -y
!pip uninstall torchvision -y
!pip install torch==1.10.1+cu111 torchvision==0.11.2+cu111 -f https://download.pytorch.org/whl/torch_stable.html
!python -m pip install 'git+https://github.com/facebookresearch/detectron2.git'

And commenting the lines of poolers.py works for me and I'm training a maskrcnn model without problems
Thanks

[BastianBopp]

It seems like this issue was introduced with the latest commit (36a65a0).

Specifying the previous commit hash from august 4th to install detectron2 fixed this issue for me.
pip install git+https://github.com/facebookresearch/detectron2.git@5aeb252b194b93dc2879b4ac34bc51a31b5aee13

[mahachaaben99]

Thank you all !

[patrickvonplaten]

This is also affected other libraries such as Transformers - see: huggingface/transformers@1f3c228

Could we fix this on master?