RFR: JDK-8319662 ForkJoinPool trims worker threads too slowly [v3]

[Viktor Klang]

On Tue, 21 Nov 2023 17:12:39 GMT, Doug Lea <dl at openjdk.org> wrote:

>> This update cascades timeouts to trim subsequent workers after the first  keepAlive inactive period.
>
> Doug Lea has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains three additional commits since the last revision:
> 
>  - Merge branch 'openjdk:master' into JDK-8319662
>  - tweak cascades; reinstate an @Contended; resolve JDK-8319498
>  - Support cascading idle timeouts

src/java.base/share/classes/java/util/concurrent/ForkJoinPool.java line 3116:

> 3114:         } catch (Exception ex) {
> 3115:             throw new RuntimeException(ex);
> 3116:         }

Suggestion:

        try {
            return task.join();
        } catch (RuntimeException | Error unchecked) {
            throw unchecked;
        } catch (Exception checked) {
            throw new RuntimeException(checked);
        }

-------------

PR Review Comment: https://git.openjdk.org/jdk/pull/16725#discussion_r1401218927