Closed alexkern1997 closed 2 years ago
Hi @alexkern1997 , thank you for trying the code! The returned dictionary from TokenClassification.forward()
method should always have keys named loss
and loss_components
. This line is not guarded by any conditional blocks. The code would raise an error if the keys are missing instead of printing nan
. Are you using the COCO dataset? I would recommend sanity checking the input tensors to the model. Let me know if I missed anything.
Hey @kdexd! Thanks for the response!
Indeed, I am not using the COCO dataset, which seemed to be the issue. My dataset contained a single caption per image, instead of 5 captions per image (which is the case in the COCO dataset). The dataset objects in the repo expect a list of captions instead of just a single caption, resulting in the model selecting a random character instead of a random caption (due to this line). If the random character was not in the set of tokens, the model was only presented the nan
being printed. Changing the line above to caption=captions
fixed this issue.
Glad that it works! I am closing this issue, feel free to reopen if you have further questions!
I am trying to pretrain using the token classification method. I copied this repo and was just trying to reproduce the results from the study. I am experiencing problems when pretraining using token classification. It seems as though the loss values are not in the output_dict variable.
When I use pretrain_virtex.py and log every 20 iterations, I get the following output.
2021-11-16T12:20:04.960052+0000: Iter 20 | Time: 0.764 sec | ETA: 54h 39m [Loss nan] [GPU 8774 MB]
Do you have any idea what could be wrong in the code?