Cannot start with alternate JVM due to JFR requirement

Hi,

Due to JFR requirement, server cannot be started with OpenJ9.
I think this is a mistake, JFR should be optionnal and not required, since it's used for debug only.

Can you please consider making it optionnal ?

Here is exception log :

Exception in thread "main" java.lang.NoClassDefFoundError: jdk.jfr.FlightRecorder
at dn.<init>(SourceFile:208)
at xn.<init>(SourceFile:39)
at xn.a(SourceFile:88)
at net.minecraft.server.Main.main(SourceFile:162)
Caused by: java.lang.ClassNotFoundException: jdk.jfr.FlightRecorder
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:822)
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:182)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:1106)
... 4 more