_pickle.PicklingError: Can't pickle <class 'boto3.resources.factory.s3.ServiceResource'>: attribute lookup s3.ServiceResource on boto3.resources.factory failed
See original GitHub issueI want to try my model. The data is saved in AWS. I use boto3 simply like
self.s3_img = S3Images(boto3.resource('s3'))
self.s3_obj = S3GetObjects()
I met this error when I feed the data and model in to the pytorch training pipeline.
The code looks like
import pytorch_lightning as pl
from pytorch_lightning import Trainer
trainer = Trainer(
checkpoint_callback=checkpoint_callback,
callbacks=get_callbacks(chkpt_path),
fast_dev_run=False,
max_epochs=100,
resume_from_checkpoint=checkpoint_path
)
trainer.fit(model)
The error is
File "main.py", line 191, in <module>
train()
File "/Users/admin/opt/anaconda3/envs/kk/lib/python3.8/site-packages/hydra/main.py", line 20, in decorated_main
run_hydra(
File "/Users/admin/opt/anaconda3/envs/kk/lib/python3.8/site-packages/hydra/_internal/utils.py", line 171, in run_hydra
hydra.run(
File "/Users/admin/opt/anaconda3/envs/kk/lib/python3.8/site-packages/hydra/_internal/hydra.py", line 82, in run
return run_job(
File "/Users/admin/opt/anaconda3/envs/kk/lib/python3.8/site-packages/hydra/plugins/common/utils.py", line 109, in run_job
ret.return_value = task_function(task_cfg)
File "main.py", line 176, in train
trainer.fit(model)
File "/Users/admin/opt/anaconda3/envs/kk/lib/python3.8/site-packages/pytorch_lightning/trainer/states.py", line 48, in wrapped_fn
result = fn(self, *args, **kwargs)
File "/Users/admin/opt/anaconda3/envs/kk/lib/python3.8/site-packages/pytorch_lightning/trainer/trainer.py", line 1084, in fit
results = self.accelerator_backend.train(model)
File "/Users/admin/opt/anaconda3/envs/kk/lib/python3.8/site-packages/pytorch_lightning/accelerators/cpu_backend.py", line 39, in train
results = self.trainer.run_pretrain_routine(model)
File "/Users/admin/opt/anaconda3/envs/kk/lib/python3.8/site-packages/pytorch_lightning/trainer/trainer.py", line 1224, in run_pretrain_routine
self._run_sanity_check(ref_model, model)
File "/Users/admin/opt/anaconda3/envs/kk/lib/python3.8/site-packages/pytorch_lightning/trainer/trainer.py", line 1257, in _run_sanity_check
eval_results = self._evaluate(model, self.val_dataloaders, max_batches, False)
File "/Users/admin/opt/anaconda3/envs/kk/lib/python3.8/site-packages/pytorch_lightning/trainer/evaluation_loop.py", line 305, in _evaluate
for batch_idx, batch in enumerate(dataloader):
File "/Users/admin/opt/anaconda3/envs/kk/lib/python3.8/site-packages/torch/utils/data/dataloader.py", line 352, in __iter__
return self._get_iterator()
File "/Users/admin/opt/anaconda3/envs/kk/lib/python3.8/site-packages/torch/utils/data/dataloader.py", line 294, in _get_iterator
return _MultiProcessingDataLoaderIter(self)
File "/Users/admin/opt/anaconda3/envs/kk/lib/python3.8/site-packages/torch/utils/data/dataloader.py", line 801, in __init__
w.start()
File "/Users/admin/opt/anaconda3/envs/kk/lib/python3.8/multiprocessing/process.py", line 121, in start
self._popen = self._Popen(self)
File "/Users/admin/opt/anaconda3/envs/kk/lib/python3.8/multiprocessing/context.py", line 224, in _Popen
return _default_context.get_context().Process._Popen(process_obj)
File "/Users/admin/opt/anaconda3/envs/kk/lib/python3.8/multiprocessing/context.py", line 284, in _Popen
return Popen(process_obj)
File "/Users/admin/opt/anaconda3/envs/kk/lib/python3.8/multiprocessing/popen_spawn_posix.py", line 32, in __init__
super().__init__(process_obj)
File "/Users/admin/opt/anaconda3/envs/kk/lib/python3.8/multiprocessing/popen_fork.py", line 19, in __init__
self._launch(process_obj)
File "/Users/admin/opt/anaconda3/envs/kk/lib/python3.8/multiprocessing/popen_spawn_posix.py", line 47, in _launch
reduction.dump(process_obj, fp)
File "/Users/admin/opt/anaconda3/envs/kk/lib/python3.8/multiprocessing/reduction.py", line 60, in dump
ForkingPickler(file, protocol).dump(obj)
_pickle.PicklingError: Can't pickle <class 'boto3.resources.factory.s3.ServiceResource'>: attribute lookup s3.ServiceResource on boto3.resources.factory failed
Can anyone tell me what’s the meaning of this error and how to solve it? Thanks for any suggestions and help!
Issue Analytics
- State:
- Created 3 years ago
- Comments:6 (3 by maintainers)
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Hi @isvogor-foi,
No updates to provide. However as previously mentioned, we should track this under #678. Closing this out now!
Hi! I found that I won’t have this error if I use python 3.7 but got this error with 3.8. 3.8 includes a new way to pickle objects.