[issue38884] __import__ is not thread-safe on Python 3

Valentyn Tymofieiev added the comment: Given that the behavior changes between Python 3.2 (no deadlock) and Python 3.3 (deadlock), this should be easily bisectable if someone has the right setup to build and run Python versions from sources in that range. --

[issue38884] __import__ is not thread-safe on Python 3

Change by Gregory P. Smith : -- nosy: +gregory.p.smith ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe:

[issue38884] __import__ is not thread-safe on Python 3

Kyle Mulka added the comment: Was able to reproduce with Python 3.9.0rc1 using issue38884.zip. macOS 10.15.5 -- ___ Python tracker ___

[issue38884] __import__ is not thread-safe on Python 3

Change by Kyle Mulka : -- nosy: +repalviglator versions: +Python 3.9 ___ Python tracker ___ ___ Python-bugs-list mailing list

[issue38884] __import__ is not thread-safe on Python 3

Change by Martin Laus : -- nosy: +Martin Laus ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe:

[issue38884] __import__ is not thread-safe on Python 3

Change by Geoffrey Bache : -- nosy: +gjb1002 ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe:

[issue38884] __import__ is not thread-safe on Python 3

Ryan Petrello added the comment: I believe I'm also encountering some version of this bug while importing code from the kombu library within a multi-threaded context. For what it's worth, I'm able to reproduce the reported deadlock (https://bugs.python.org/file48737/issue38884.zip) using

[issue38884] __import__ is not thread-safe on Python 3

Brett Cannon added the comment: @valentyn just assume it's good enough unless some asks otherwise. People are probably too busy right now to be looking at this and so you might be waiting a while for a more definitive answer. -- ___ Python

[issue38884] __import__ is not thread-safe on Python 3

Valentyn Tymofieiev added the comment: Just checking - is issue38884.zip an acceptable repro for this issue? Thanks. -- ___ Python tracker ___

[issue38884] __import__ is not thread-safe on Python 3

Valentyn Tymofieiev added the comment: @brett.cannon, looks like I inadvertently dropped you from nosy list, so in case you missed the updates - please take a look at issue38884.zip. Thank you. -- ___ Python tracker

[issue38884] __import__ is not thread-safe on Python 3

Change by Valentyn Tymofieiev : -- nosy: +brett.cannon, eric.snow, ncoghlan ___ Python tracker ___ ___ Python-bugs-list mailing

[issue38884] __import__ is not thread-safe on Python 3

Change by Valentyn Tymofieiev : -- nosy: +Valentyn Tymofieiev -brett.cannon ___ Python tracker ___ ___ Python-bugs-list mailing

[issue38884] __import__ is not thread-safe on Python 3

Change by Valentyn Tymofieiev : -- nosy: +brett.cannon -Valentyn Tymofieiev ___ Python tracker ___ ___ Python-bugs-list mailing

[issue38884] __import__ is not thread-safe on Python 3

Change by Valentyn Tymofieiev : -- versions: +Python 3.8 ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe:

[issue38884] __import__ is not thread-safe on Python 3

Valentyn Tymofieiev added the comment: The behavior changes between Python 3.2 (no deadlock) and Python 3.3 (deadlock). Deadlock also reproducible on Python 3.8. -- ___ Python tracker

[issue38884] __import__ is not thread-safe on Python 3

Valentyn Tymofieiev added the comment: input_deadlock.py in issue38884.zip has a left-over comment: # Requires pip install tensorflow==2.0.0 tensorflow-transform==0.15.0 Please ignore that. -- ___ Python tracker

[issue38884] __import__ is not thread-safe on Python 3

Valentyn Tymofieiev added the comment: Repro: unpack issue38884.zip python input_deadlock.py (fails on Python 3.7, but not on 2.7). -- ___ Python tracker ___

[issue38884] __import__ is not thread-safe on Python 3

Valentyn Tymofieiev added the comment: Attaching a minimal repro with simple project hierarchy. -- nosy: -brett.cannon, eric.snow, ncoghlan Added file: https://bugs.python.org/file48737/issue38884.zip ___ Python tracker

[issue38884] __import__ is not thread-safe on Python 3

Brett Cannon added the comment: Can you test this with a package that isn't tensorflow (e.g. something else in the stdlib or something created manually; basically a smaller reproducer)? It's hard to diagnose if this is really Python or not without a smaller reproducer as tensorflow might be

[issue38884] __import__ is not thread-safe on Python 3

Change by Brett Cannon : -- nosy: +brett.cannon, eric.snow, ncoghlan ___ Python tracker ___ ___ Python-bugs-list mailing list

[issue38884] __import__ is not thread-safe on Python 3

Valentyn Tymofieiev added the comment: Possibly related: https://bugs.python.org/issue35943 -- ___ Python tracker ___ ___

[issue38884] __import__ is not thread-safe on Python 3

Valentyn Tymofieiev added the comment: Attached import_deadlock.py fails with ... File "", line 980, in _find_and_load File "", line 149, in __enter__ File "", line 94, in acquire _frozen_importlib._DeadlockError: deadlock detected by

[issue38884] __import__ is not thread-safe on Python 3

New submission from Valentyn Tymofieiev : Attached import_module_not_found.py consistently fails for me on Python 3.7.5 and earlier Python 3 versions that I have tried with File "/usr/lib/python3.7/threading.py", line 926, in _bootstrap_inner self.run() File