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Fix for "One or more background workers are no longer alive. Exiting" errors #2910

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Fix for "One or more background workers are no longer alive. Exiting" errors #2910

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11d56f8
Update data_loader.py
MikeUU332 Sep 18, 2025
9298023
Update data_loader.py
MikeUU332 Sep 19, 2025
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7 changes: 6 additions & 1 deletion nnunetv2/training/dataloading/data_loader.py
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Original file line number Diff line number Diff line change
Expand Up @@ -15,6 +15,8 @@
from nnunetv2.utilities.plans_handling.plans_handler import PlansManager
from acvl_utils.cropping_and_padding.bounding_boxes import crop_and_pad_nd

from threading import Lock
global_mutex = Lock()

class nnUNetDataLoader(DataLoader):
def __init__(self,
Expand Down Expand Up @@ -198,7 +200,8 @@ def generate_train_batch(self):

if self.transforms is not None:
with torch.no_grad():
with threadpool_limits(limits=1, user_api=None):
# with threadpool_limits(limits=1, user_api=None):
global_mutex.acquire()
data_all = torch.from_numpy(data_all).float()
seg_all = torch.from_numpy(seg_all).to(torch.int16)
images = []
Expand All @@ -213,6 +216,8 @@ def generate_train_batch(self):
else:
seg_all = torch.stack(segs)
del segs, images
global_mutex.release()

return {'data': data_all, 'target': seg_all, 'keys': selected_keys}

return {'data': data_all, 'target': seg_all, 'keys': selected_keys}
Expand Down