[issue43939] Deadlock in logging
Raymond Hettinger
report at bugs.python.org
Sun Apr 25 22:09:05 EDT 2021
Raymond Hettinger <raymond.hettinger at gmail.com> added the comment:
A few thoughts:
* We normally say "all bets are off" when it comes to manipulating Python internals with ctypes. This issue is just one of many ways to wreak havoc.
* The programming pattern of killing running threads at arbitrary points in their execution is inherently fragile. I don't think other modules are obliged to try to support it.
* The pattern of "acquire(); try: something(); finally release();" is common. Logging is only of many modules in the ecosystem that use this pattern.
* ISTM we can't assume that the lock is a context manager because createLock() is a public method and users can do anything with it.
* That said, we could add our own __enter__ and __exit__ methods to the Handler class.
* Lastly, I have a vague memory that at one point there was a rejected proposal to switch logging to use the with-statement throughout. We should research that to see if the reasoning is still applicable or not.
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nosy: +pitrou, rhettinger
versions: -Python 3.6, Python 3.7, Python 3.8, Python 3.9
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