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[SPARK-41775][PYTHON][FOLLOW-UP] Updating error message for training using PyTorch functions #40322

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[SPARK-41775][PYTHON][FOLLOW-UP] Updating error message for training using PyTorch functions #40322

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9 changes: 7 additions & 2 deletions python/pyspark/ml/torch/distributor.py
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Original file line number Diff line number Diff line change
Expand Up @@ -627,11 +627,16 @@ def _run_training_on_pytorch_function(
with TorchDistributor._setup_files(train_fn, *args) as (train_file_path, output_file_path):
args = [] # type: ignore
TorchDistributor._run_training_on_pytorch_file(input_params, train_file_path, *args)
if not os.path.exists(output_file_path):
raise RuntimeError(
"TorchDistributor failed during training. "
"View stdout logs for detailed error message."
)
try:
output = TorchDistributor._get_pickled_output(output_file_path)
except FileNotFoundError as e:
except Exception as e:
raise RuntimeError(
"TorchDistributor failed during training. "
"TorchDistributor failed due to a pickling error. "
"View stdout logs for detailed error message."
) from e
return output
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