RFR: 8371748: Remove the (empty) ThreadPoolExecutor.finalize() method

[Jaikiran Pai]

On Thu, 13 Nov 2025 23:10:59 GMT, Brent Christian <bchristi at openjdk.org> wrote:

> From the bug report:
> Prior to JDK 11, ThreadPoolExecutor.finalize() was specified to
> "[invoke] shutdown() when this executor is no longer referenced and it has no threads."
> 
> In JDK 11, ThreadPoolExecutor.finalize() was re-specified to do nothing, leaving the finalize() method empty. ([JDK-8190324](https://bugs.openjdk.org/browse/JDK-8190324)).
> 
> In JDK 18, finalize() was deprecated for removal ([JDK-8276447](https://bugs.openjdk.org/browse/JDK-8276447)), after first being "standard" deprecated in JDK 9 ([JDK-8165641](https://bugs.openjdk.org/browse/JDK-8165641)).
> 
> The finalize() method can safely be removed from ThreadPoolExecutor.

Marked as reviewed by jpai (Reviewer).

The failures in the GitHub actions job appear related:


/home/runner/work/jdk/jdk/test/jdk/java/util/concurrent/tck/ThreadPoolExecutorSubclassTest.java:2011: error: unreported exception Throwable; must be caught or declared to be thrown
                super.finalize();
                              ^

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

PR Review: https://git.openjdk.org/jdk/pull/28311#pullrequestreview-3464063996
PR Comment: https://git.openjdk.org/jdk/pull/28311#issuecomment-3531920120