Reproducer:

    public class Main {
      public static void main(String... args) throws Exception {
       Thread.sleep(100_000);
      }
    }
    $ mkdir recordings
    $ java -XX:StartFlightRecording:duration=30s,filename=./recordings Main.java
    $ cd recordings
    $ ls -l
    total 0

Expected a recording with a filename similar to hotspot-pid-98089-id-1-2024_01_09_22_01_14.jfr

If the JVM exits before the recording ends, a file with an auto-generated name is written.

Impact: High, loss of data
Likelihood: Low, requires JFR and that a duration is specified with a directory.
Workaround: Medium, specify an explicit filename, or omit duration, but may not be what user wants

HLM => P3