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Sam Gross 4256847190 [3.12] gh-125451: Fix deadlock in ProcessPoolExecutor shutdown (GH-125492) (#125599 ) There was a deadlock when `ProcessPoolExecutor` shuts down at the same time that a queueing thread handles an error processing a task. Don't use `_shutdown_lock` to protect the `_ThreadWakeup` pipes -- use an internal lock instead. This fixes the ordering deadlock where the `ExecutorManagerThread` holds the `_shutdown_lock` and joins the queueing thread, while the queueing thread is attempting to acquire the `_shutdown_lock` while closing the `_ThreadWakeup`. (cherry picked from commit `760872efec`)	2024-10-16 14:03:32 -04:00
..
futures	[3.12] gh-125451: Fix deadlock in ProcessPoolExecutor shutdown (GH-125492) (#125599 )	2024-10-16 14:03:32 -04:00
__init__.py

[3.12] gh-125451: Fix deadlock in ProcessPoolExecutor shutdown (GH-125492) (#125599 )

There was a deadlock when `ProcessPoolExecutor` shuts down at the same
time that a queueing thread handles an error processing a task.

Don't use `_shutdown_lock` to protect the `_ThreadWakeup` pipes -- use
an internal lock instead. This fixes the ordering deadlock where the
`ExecutorManagerThread` holds the `_shutdown_lock` and joins the
queueing thread, while the queueing thread is attempting to acquire the
`_shutdown_lock` while closing the `_ThreadWakeup`.
(cherry picked from commit 760872efec)

2024-10-16 14:03:32 -04:00

futures [3.12] gh-125451: Fix deadlock in ProcessPoolExecutor shutdown (GH-125492) (#125599 ) 2024-10-16 14:03:32 -04:00

__init__.py