[issue42752] multiprocessing Queue leaks a file descriptor associated with the pipe writer (#33081 still a problem)
mattip
report at bugs.python.org
Fri Jan 1 01:35:59 EST 2021
mattip <matti.picus at gmail.com> added the comment:
Just to be clear, here is the code from the test (how do you format a code block here?) that demonstrates the writer is not closed when nothing is put into the queue
```
$ python3
Python 3.8.6 | packaged by conda-forge | (default, Oct 7 2020, 19:08:05)
[GCC 7.5.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import multiprocessing
>>> q = multiprocessing.Queue()
>>> q.close()
>>> q.join_thread()
>>> q._reader.closed
True
>>> q._writer.closed
False
>>>
```
And the changed behaviour to close the writer if the queue is used
```
>>> q = multiprocessing.Queue()
>>> q.put(1)
>>> q.get()
1
>>> q.close()
>>> q.join_thread()
>>> q._reader.closed
True
>>> q._writer.closed
True
```
----------
nosy: +mattip
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<https://bugs.python.org/issue42752>
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