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Description
Describe the bug
When using multiprocessing Pool, the application hangs on get()
It will hang on close() also.
Code to reproduce the behaviour:
# example codeimport multiprocessingas mpdefdo_print(value):print(value)return f'Done {value}'defmain(): pool= mp.Pool(mp.cpu_count()) results= [] results.append(pool.apply_async(do_print, ['uno']))for rin results:print(r.get())if__name__=='__main__': main()
Expected behaviour
Output:
unoDone unoOS
Linux Ubuntu 24.0.4 6.8.0-79-generic 79-Ubuntu SMP PREEMPT_DYNAMIC Tue Aug 12 14:42:46 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux
Python version
3.12.3
Cython version
3.1.3, 3.0.8
Additional context
compilation:
cython -3 --embed test.pyx gcc -otest test.c -I /usr/include/python3.12 -Wl,-rpath,/usr/lib/x86_64-linux-gnu/libpython3.12.so /usr/lib/x86_64-linux-gnu/libpython3.12.soMetadata
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