https://aries441.tech/tags/concurrency/Recent content in Concurrency on Aries441's Tech BlogHugozh-cnMon, 29 Jun 2026 00:00:00 +0800https://aries441.tech/posts/tech-notes/python-threadpoolexecutor-interpreter-shutdown/Mon, 29 Jun 2026 00:00:00 +0800https://aries441.tech/posts/tech-notes/python-threadpoolexecutor-interpreter-shutdown/本文复盘一个发生在 CPython 3.9+ 中的隐藏并发陷阱：当主线程先退出、非 daemon 线程继续撑住进程，而 daemon 线程随后调用 ThreadPoolExecutor.submit() 时，会触发 `cannot schedule new futures after interpreter shutdown`。文章结合源码、版本演变与官方 issue，解释其根因、触发条件与可行修复方案。