RFR: 8273541: Cleaner Thread creates with normal priority instead of MAX_PRIORITY - 2

[kabutz]

On Thu, 9 Sep 2021 10:14:48 GMT, kabutz <github.com+332398+kabutz at openjdk.org> wrote:

> …of MAX_PRIORITY-2 during refactoring
> 
> Appears in Java 17 for the first time.
> 
> During refactoring, the priority was changed from Thread.MAX_PRIORITY -  2 to instead state Thread.MIN_PRIORITY - 2, which results in a negative priority, and is thus set to Thread.NORM_PRIORITY. Thus the Cleaner by default now has threads with priority 5, instead of 8.
> 
> The change was done in git revision # 992b50087d2ec8878dfcbbd1820a00b6b6bdf644 and label 8261036 by Claes Redestad

> It looks like [d621cdd](https://github.com/openjdk/jdk/commit/d621cdd957b78e53ea63b6b9bb2fce08560a8620) has undone the changes.

Thanks Alan!

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PR: https://git.openjdk.java.net/jdk/pull/5439