RFR: 8287168: (fs) WatchService leaves thread running if not closed

[Alan Bateman]

On Thu, 2 Jun 2022 02:52:55 GMT, Brian Burkhalter <bpb at openjdk.org> wrote:

> Add a `Cleaner` to each `WatchService` implementation.

I thin for this bug report that we first need to decide if it should be closed or closed as WNF. If we do change it then it will require significant review. So please don't rush this one into JDK 19.

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PR: https://git.openjdk.java.net/jdk/pull/8986