On Thu, Apr 5, 2018 at 4:45 PM, Tony Printezis <tprinte...@twitter.com> wrote: > Would proposing to introduce thread exit hooks be reasonable? Or is > everyone going to freak out? :-) The hooks can be either per-Thread or even > per-ThreadLocal. And it's OK if the hooks can only be used within java.base.
User-accessible thread exit hooks would be nice, from a user perspective. From a JDK perspective - it adds new opportunities for user code to jam things up, so it's a tradeoff. ThreadLocal clearing on thread exit would have been nice back in the beginning, but now I think it would be a fairly substantial behavior change. Adding a new exit() method on ThreadLocal would be better (but not perfect) compatibility-wise, and see prior note about users jamming things up... I think that at a minimum, explicitly releasing thread-local NIO direct buffers on thread exit (without introducing a user facing API) is probably safe. Some kind of user-accessible hook would be nice, but I can't imagine it would take anything less than a massive discussion to get there. -- - DML
