When i run the multiprocessing example on a OSX. I get the Error OSError: [Errno 28] No space left on device.
The ENOSPC ("No space left on device") error will be triggered in any situation in which the data or the metadata associated with an I/O operation can't be written down anywhere because of lack of space. This doesn't always mean disk space – it could mean physical disk space, logical space (e.g. maximum file length), space in a certain data structure or address space. For example you can get it if there isn't space in the directory table (vfat) or there aren't any inodes left. It roughly means “I can't find where to write this down”. Source: https://stackoverflow.com/a/6999259/330658
What i don't understand, where files are written down in my code below?
Any help highly appreicated.
Example Code:
#! /usr/bin/env python3
import sys
import os
import multiprocessing as mp
import time
def foo_pool(x):
time.sleep(2)
return x*x
result_list = []
def log_result(result):
result_list.append(result)
print(result)
def apply_async_with_callback():
pool = mp.Pool()
for i in range(10):
pool.apply_async(foo_pool, args = (i, ), callback = log_result)
pool.close()
pool.join()
print(result_list)
if __name__ == '__main__':
apply_async_with_callback()
Full Error:
python3 test.py
Traceback (most recent call last):
File "test.py", line 32, in <module>
apply_async_with_callback()
File "test.py", line 23, in apply_async_with_callback
pool = mp.Pool()
File "/usr/local/Cellar/python@3.9/3.9.7_1/Frameworks/Python.framework/Versions/3.9/lib/python3.9/multiprocessing/context.py", line 119, in Pool
return Pool(processes, initializer, initargs, maxtasksperchild,
File "/usr/local/Cellar/python@3.9/3.9.7_1/Frameworks/Python.framework/Versions/3.9/lib/python3.9/multiprocessing/pool.py", line 191, in __init__
self._setup_queues()
File "/usr/local/Cellar/python@3.9/3.9.7_1/Frameworks/Python.framework/Versions/3.9/lib/python3.9/multiprocessing/pool.py", line 343, in _setup_queues
self._inqueue = self._ctx.SimpleQueue()
File "/usr/local/Cellar/python@3.9/3.9.7_1/Frameworks/Python.framework/Versions/3.9/lib/python3.9/multiprocessing/context.py", line 113, in SimpleQueue
return SimpleQueue(ctx=self.get_context())
File "/usr/local/Cellar/python@3.9/3.9.7_1/Frameworks/Python.framework/Versions/3.9/lib/python3.9/multiprocessing/queues.py", line 342, in __init__
self._rlock = ctx.Lock()
File "/usr/local/Cellar/python@3.9/3.9.7_1/Frameworks/Python.framework/Versions/3.9/lib/python3.9/multiprocessing/context.py", line 68, in Lock
return Lock(ctx=self.get_context())
File "/usr/local/Cellar/python@3.9/3.9.7_1/Frameworks/Python.framework/Versions/3.9/lib/python3.9/multiprocessing/synchronize.py", line 162, in __init__
SemLock.__init__(self, SEMAPHORE, 1, 1, ctx=ctx)
File "/usr/local/Cellar/python@3.9/3.9.7_1/Frameworks/Python.framework/Versions/3.9/lib/python3.9/multiprocessing/synchronize.py", line 57, in __init__
sl = self._semlock = _multiprocessing.SemLock(
OSError: [Errno 28] No space left on device
