JFR Recordings Missing Periodic Events

[Carter Kozak]

Hi,

I've run into a strange issue with JFR recordings on Java 21 when taking multiple JFR recordings.
The first recording works as expected. If I do not immediately start the next recording, periodic JFR events are no longer produced. Events based on actions still appear (e.g. virtual thread pinning), but periodic events are missing.
I cannot reproduce this issue on Java 17, but it does seem to be 100% reproducible on Java 21 (including a 21.0.1+12 fastdebug build).
I've created a minimal reproducer here with github-actions executing the main method using both jdk-17 and jdk-21 to illustrate the failure.
https://github.com/carterkozak/periodic-event-repro/blob/develop/src/main/java/net/ckozak/repro/Main.java

I haven't had a chance to dig into the root cause quite yet, but figured I'd share for awareness in case folks have ideas.

Best,
Carter Kozak
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