[issue21149] logging._removeHandlerRef is not threadsafe during interpreter shutdown

[Yilei Yang]

Yilei Yang <yileiyang9 at gmail.com> added the comment:

Here is a minimal example:

main.py:
    from pkg_a import lib_a
pkg_a/__init__.py
pkg_a/lib_a.py
    import logging
    import sys
    import pkg_a  # This is important
    handler = logging.StreamHandler(sys.stderr)

It does not happen in Python 3 though (3.5.3 at least).

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nosy: +yileiyang

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<https://bugs.python.org/issue21149>
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