RFR: 8259354 Fix race condition in AbstractEventStream.nextThreadName

[Carter Kozak]

On Thu, 7 Jan 2021 04:00:26 GMT, Erik Gahlin <egahlin at openjdk.org> wrote:

>> Marked as reviewed by egahlin (Reviewer).
>
> I created a tricket:
> 
> https://bugs.openjdk.java.net/browse/JDK-8259354
> 
> Have you run the tests in test/jdk/jdk/jfr?

Thank you, I've updated the commit message with the ticket information.

> Have you run the tests in test/jdk/jdk/jfr?

Yes, all tests pass.

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PR: https://git.openjdk.java.net/jdk/pull/1871