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Fix for "One or more background workers are no longer alive. Exiting" errors #136

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Fix for "One or more background workers are no longer alive. Exiting" errors #136

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11 changes: 8 additions & 3 deletions batchgenerators/dataloading/nondet_multi_threaded_augmenter.py
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Original file line number Diff line number Diff line change
Expand Up @@ -34,11 +34,14 @@
except ImportError:
torch = None

from threading import Lock
global_mutex = Lock()

def producer(queue: Queue, data_loader, transform, thread_id: int, seed,
abort_event: Event, wait_time: float = 0.02):
# the producer will set the abort event if something happens
with threadpool_limits(1, None):
# with threadpool_limits(1, None):
global_mutex.acquire() # using instead of threadpool_limits for thread safety
np.random.seed(seed)
data_loader.set_thread_id(thread_id)
item = None
Expand Down Expand Up @@ -72,7 +75,9 @@ def producer(queue: Queue, data_loader, transform, thread_id: int, seed,
traceback.print_exc()
abort_event.set()
return


#End of mutex section
global_mutex.release()

def pin_memory_of_all_eligible_items_in_dict(result_dict):
for k in result_dict.keys():
Expand Down Expand Up @@ -276,4 +281,4 @@ def __del__(self):
end = time()
print(end - st)

mt._finish()
mt._finish()