Comment by anorwell

This actually intersects with two of my current interests. We have, in production, rarely been seeing ThreadPoolExecutor hangs (JDK17) during shutdown. After a lot of debugging, I've been suspecting more and more that it may be an actual JDK issue. But, this type of issue is extremely hard to reason about in production, and I've never successfully reproduced it locally. (It's not clear to me that it's the same issue as in the post, since it's not a scheduled executor.)

Separately, we're looking at using fray for concurrency property testing, as a way to reliably catch concurrency issues in a distributed system by simulating it within a single JVM.