Memory error with Python multiprocessing pool.map The Next CEO of Stack OverflowPython 3.3...
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Memory error with Python multiprocessing pool.map
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I have a function that I'm trying to run in parallel. I suspect that there is a memory leak somewhere, but I'm unsure about how to fix this.
Error message:
Exception in thread Thread-22:
Traceback (most recent call last):
File "/home/ec2-user/anaconda3/envs/python3/lib/python3.6/threading.py", line 916, in _bootstrap_inner
self.run()
File "/home/ec2-user/anaconda3/envs/python3/lib/python3.6/threading.py", line 864, in run
self._target(*self._args, **self._kwargs)
File "/home/ec2-user/anaconda3/envs/python3/lib/python3.6/multiprocessing/pool.py", line 405, in _handle_workers
pool._maintain_pool()
File "/home/ec2-user/anaconda3/envs/python3/lib/python3.6/multiprocessing/pool.py", line 246, in _maintain_pool
self._repopulate_pool()
File "/home/ec2-user/anaconda3/envs/python3/lib/python3.6/multiprocessing/pool.py", line 239, in _repopulate_pool
w.start()
File "/home/ec2-user/anaconda3/envs/python3/lib/python3.6/multiprocessing/process.py", line 105, in start
self._popen = self._Popen(self)
File "/home/ec2-user/anaconda3/envs/python3/lib/python3.6/multiprocessing/context.py", line 277, in _Popen
return Popen(process_obj)
File "/home/ec2-user/anaconda3/envs/python3/lib/python3.6/multiprocessing/popen_fork.py", line 19, in __init__
self._launch(process_obj)
File "/home/ec2-user/anaconda3/envs/python3/lib/python3.6/multiprocessing/popen_fork.py", line 66, in _launch
self.pid = os.fork()
OSError: [Errno 12] Cannot allocate memory
How I use multiprocessing:
def main():
with Pool(processes = 92) as p:
p.map(mapVins, range(0, 33000))
p.close()
p.join()
if __name__ == '__main__':
main()
The error shows up once for just one process, then all processes die until the kernel just hangs. Also before running the function, note that I have about 40GB / 256GB of RAM used.
memory crash python3 parallel-processing
edited 2 hours ago
karel
9,34493339
asked 3 hours ago
staimourstaimour
11
New contributor
staimour is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
I have a function that I'm trying to run in parallel. I suspect that there is a memory leak somewhere, but I'm unsure about how to fix this.
Error message:
Exception in thread Thread-22:
Traceback (most recent call last):
File "/home/ec2-user/anaconda3/envs/python3/lib/python3.6/threading.py", line 916, in _bootstrap_inner
self.run()
File "/home/ec2-user/anaconda3/envs/python3/lib/python3.6/threading.py", line 864, in run
self._target(*self._args, **self._kwargs)
File "/home/ec2-user/anaconda3/envs/python3/lib/python3.6/multiprocessing/pool.py", line 405, in _handle_workers
pool._maintain_pool()
File "/home/ec2-user/anaconda3/envs/python3/lib/python3.6/multiprocessing/pool.py", line 246, in _maintain_pool
self._repopulate_pool()
File "/home/ec2-user/anaconda3/envs/python3/lib/python3.6/multiprocessing/pool.py", line 239, in _repopulate_pool
w.start()
File "/home/ec2-user/anaconda3/envs/python3/lib/python3.6/multiprocessing/process.py", line 105, in start
self._popen = self._Popen(self)
File "/home/ec2-user/anaconda3/envs/python3/lib/python3.6/multiprocessing/context.py", line 277, in _Popen
return Popen(process_obj)
File "/home/ec2-user/anaconda3/envs/python3/lib/python3.6/multiprocessing/popen_fork.py", line 19, in __init__
self._launch(process_obj)
File "/home/ec2-user/anaconda3/envs/python3/lib/python3.6/multiprocessing/popen_fork.py", line 66, in _launch
self.pid = os.fork()
OSError: [Errno 12] Cannot allocate memory
How I use multiprocessing:
def main():
with Pool(processes = 92) as p:
p.map(mapVins, range(0, 33000))
p.close()
p.join()
if __name__ == '__main__':
main()
The error shows up once for just one process, then all processes die until the kernel just hangs. Also before running the function, note that I have about 40GB / 256GB of RAM used.
memory crash python3 parallel-processing
edited 2 hours ago
karel
9,34493339
asked 3 hours ago
staimourstaimour
11
New contributor
staimour is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
I have a function that I'm trying to run in parallel. I suspect that there is a memory leak somewhere, but I'm unsure about how to fix this.
Error message:
Exception in thread Thread-22:
Traceback (most recent call last):
File "/home/ec2-user/anaconda3/envs/python3/lib/python3.6/threading.py", line 916, in _bootstrap_inner
self.run()
File "/home/ec2-user/anaconda3/envs/python3/lib/python3.6/threading.py", line 864, in run
self._target(*self._args, **self._kwargs)
File "/home/ec2-user/anaconda3/envs/python3/lib/python3.6/multiprocessing/pool.py", line 405, in _handle_workers
pool._maintain_pool()
File "/home/ec2-user/anaconda3/envs/python3/lib/python3.6/multiprocessing/pool.py", line 246, in _maintain_pool
self._repopulate_pool()
File "/home/ec2-user/anaconda3/envs/python3/lib/python3.6/multiprocessing/pool.py", line 239, in _repopulate_pool
w.start()
File "/home/ec2-user/anaconda3/envs/python3/lib/python3.6/multiprocessing/process.py", line 105, in start
self._popen = self._Popen(self)
File "/home/ec2-user/anaconda3/envs/python3/lib/python3.6/multiprocessing/context.py", line 277, in _Popen
return Popen(process_obj)
File "/home/ec2-user/anaconda3/envs/python3/lib/python3.6/multiprocessing/popen_fork.py", line 19, in __init__
self._launch(process_obj)
File "/home/ec2-user/anaconda3/envs/python3/lib/python3.6/multiprocessing/popen_fork.py", line 66, in _launch
self.pid = os.fork()
OSError: [Errno 12] Cannot allocate memory
How I use multiprocessing:
def main():
with Pool(processes = 92) as p:
p.map(mapVins, range(0, 33000))
p.close()
p.join()
if __name__ == '__main__':
main()
The error shows up once for just one process, then all processes die until the kernel just hangs. Also before running the function, note that I have about 40GB / 256GB of RAM used.
memory crash python3 parallel-processing
edited 2 hours ago
karel
9,34493339
asked 3 hours ago
staimourstaimour
11
New contributor
staimour is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
I have a function that I'm trying to run in parallel. I suspect that there is a memory leak somewhere, but I'm unsure about how to fix this.
Error message:
Exception in thread Thread-22:
Traceback (most recent call last):
File "/home/ec2-user/anaconda3/envs/python3/lib/python3.6/threading.py", line 916, in _bootstrap_inner
self.run()
File "/home/ec2-user/anaconda3/envs/python3/lib/python3.6/threading.py", line 864, in run
self._target(*self._args, **self._kwargs)
File "/home/ec2-user/anaconda3/envs/python3/lib/python3.6/multiprocessing/pool.py", line 405, in _handle_workers
pool._maintain_pool()
File "/home/ec2-user/anaconda3/envs/python3/lib/python3.6/multiprocessing/pool.py", line 246, in _maintain_pool
self._repopulate_pool()
File "/home/ec2-user/anaconda3/envs/python3/lib/python3.6/multiprocessing/pool.py", line 239, in _repopulate_pool
w.start()
File "/home/ec2-user/anaconda3/envs/python3/lib/python3.6/multiprocessing/process.py", line 105, in start
self._popen = self._Popen(self)
File "/home/ec2-user/anaconda3/envs/python3/lib/python3.6/multiprocessing/context.py", line 277, in _Popen
return Popen(process_obj)
File "/home/ec2-user/anaconda3/envs/python3/lib/python3.6/multiprocessing/popen_fork.py", line 19, in __init__
self._launch(process_obj)
File "/home/ec2-user/anaconda3/envs/python3/lib/python3.6/multiprocessing/popen_fork.py", line 66, in _launch
self.pid = os.fork()
OSError: [Errno 12] Cannot allocate memory
How I use multiprocessing:
def main():
with Pool(processes = 92) as p:
p.map(mapVins, range(0, 33000))
p.close()
p.join()
if __name__ == '__main__':
main()
The error shows up once for just one process, then all processes die until the kernel just hangs. Also before running the function, note that I have about 40GB / 256GB of RAM used.
memory crash python3 parallel-processing
memory crash python3 parallel-processing
edited 2 hours ago
karel
9,34493339
asked 3 hours ago
staimourstaimour
11
New contributor
staimour is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 2 hours ago
karel
9,34493339
asked 3 hours ago
staimourstaimour
11
New contributor
staimour is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 2 hours ago
karel
9,34493339
edited 2 hours ago
karel
9,34493339
edited 2 hours ago
karel
9,34493339
9,34493339
asked 3 hours ago
staimourstaimour
11
New contributor
staimour is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 3 hours ago
staimourstaimour
11
asked 3 hours ago
staimourstaimour
11
11
New contributor
staimour is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
staimour is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
staimour is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
add a comment |
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