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fix multi worker dataloader deadlock #9126

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Dec 19, 2017
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fix multi worker dataloader deadlock #9126

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3 changes: 2 additions & 1 deletion python/mxnet/gluon/data/dataloader.py
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Original file line number Diff line number Diff line change
Expand Up @@ -216,10 +216,11 @@ def __iter__(self):

for idx, batch in enumerate(self._batch_sampler):
key_queue.put((idx, batch))
num_batches = idx + 1

data_buffer = {}
curr_idx = 0
for _ in range(len(self._batch_sampler)):
for _ in range(num_batches):
idx, batch = data_queue.get()
data_buffer[idx] = batch
while curr_idx in data_buffer:
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