ProcessPoolExecutor

Stop Stuck Process Pools with Python 3.14

ProcessPoolExecutor is a convenient way to spread CPU-bound Python work across multiple processes. Most of the time, its normal shutdown behavior is exactly what an application wants: stop accepting work, let running tasks finish, and clean up worker processes. Some failures do not fit that model. A worker can become stuck in native code, wait indefinitely on an external resource, or execute a task whose runtime has exceeded the application’s operational deadline. At that point, cancelling a Future may not stop work that is already running, and waiting for an orderly pool shutdown may take too long.