bug描述 Describe the Bug
DataLoader
没有正常关闭thread,如果大量call DataLoader
,会导致最后没有资源了。
实例化后的 DataLoader
,会去申请资源(应该是开了thread),但是没有正常关闭,导致最后申请不到资源,报错 RuntimeError: Resource temporarily unavailable
。
不确定是否是bug,因为这不是常规操作。但是否有方法避免?
from paddle.io import Dataset, DataLoader
train_loader = DataLoader(train_set, batch_size=2, shuffle=True)
for _ in range(10000):
for i, e in enumerate(train_loader):
print(_, i)
break
---------------------------------------------------------------------------
RuntimeError Traceback (most recent call last)
/tmp/ipykernel_19543/3388343434.py in <module>
1 for _ in range(1200):
2 train_loader = DataLoader(train_set, batch_size=2, shuffle=True)
----> 3 for i, e in enumerate(train_loader):
4 print(_, i)
5 break
~/miniconda3/envs/pp2/lib/python3.7/site-packages/paddle/fluid/reader.py in __iter__(self)
424 def __iter__(self):
425 if self.num_workers == 0:
--> 426 return _DataLoaderIterSingleProcess(self)
427 elif self._persistent_workers:
428 if self._iterator is None:
~/miniconda3/envs/pp2/lib/python3.7/site-packages/paddle/fluid/dataloader/dataloader_iter.py in __init__(self, loader)
168 self._blocking_queue_capacity = 1 * len(self._places)
169
--> 170 self._init_thread()
171 self._shutdown = False
172
~/miniconda3/envs/pp2/lib/python3.7/site-packages/paddle/fluid/dataloader/dataloader_iter.py in _init_thread(self)
188 self._blocking_queue, self._var_names, self._shapes, self._dtypes,
189 self._need_check_feed, self._places, self._use_buffer_reader, True,
--> 190 self._pin_memory)
191
192 self._thread = threading.Thread(
RuntimeError: Resource temporarily unavailable
其他补充信息 Additional Supplementary Information
和 #38371 类似。
5条答案
按热度按时间jhdbpxl91#
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rjjhvcjd2#
ps aux
能看到相关的进程嘛,直接kill掉试下d5vmydt93#
em... it's not a solution at all.
如果出现这个
Resource temporarily unavailable
问题的话,terminal里面也无法操作。terminal会有弹出bash: fork: retry: 资源暂时不可用
。我现在在jupyter notebook里面运行,只要把jupyter关了或者重启,就可以解决这个问题。但是程序无法继续运行下去。
cfh9epnr4#
dataloader是在一个epoch启动的时候启动线程和子进程,结束的时候释放线程和子进程,如果你代码里中途break出来,挥刀自没法走到结束时释放进程线程的逻辑,你是什么场景需要反复从dataloader for循环里break出来么
bd1hkmkf5#
场景:pytorch算法influence function 转paddle,https://github.com/nimarb/pytorch_influence_functions/blob/master/pytorch_influence_functions/influence_function.py#L35-L52。
暂时是按照这样解决的: