The newly added test jdk/management/VirtualThreadSchedulerMXBean/VirtualThreadSchedulerMXBeanTest.java intermittent fail, the log sippet:

STARTED VirtualThreadSchedulerMXBeanTest::testReduceParallelism '[1] [parallelism=64, size=0, mounted=0, queued=0]'
await mounted virtual thread count >= 68 ...
await mounted virtual thread count <= 32 ...
SUCCESSFUL VirtualThreadSchedulerMXBeanTest::testReduceParallelism '[1] [parallelism=64, size=0, mounted=0, queued=0]'
STARTED VirtualThreadSchedulerMXBeanTest::testReduceParallelism '[2] MXBeanProxy(com.sun.jmx.mbeanserver.JmxMBeanServer@74fd34be[jdk.management:type=VirtualThreadScheduler])'
await mounted virtual thread count >= 68 ...
await mounted virtual thread count <= 32 ...
org.opentest4j.AssertionFailedError: expected: <true> but was: <false>
    at org.junit.jupiter.api.AssertionFailureBuilder.build(AssertionFailureBuilder.java:151)
    at org.junit.jupiter.api.AssertionFailureBuilder.buildAndThrow(AssertionFailureBuilder.java:132)
    at org.junit.jupiter.api.AssertTrue.failNotTrue(AssertTrue.java:63)
    at org.junit.jupiter.api.AssertTrue.assertTrue(AssertTrue.java:36)
    at org.junit.jupiter.api.AssertTrue.assertTrue(AssertTrue.java:31)
    at org.junit.jupiter.api.Assertions.assertTrue(Assertions.java:183)
    at VirtualThreadSchedulerMXBeanTest.testReduceParallelism(VirtualThreadSchedulerMXBeanTest.java:159)
    at java.base/java.lang.reflect.Method.invoke(Method.java:573)
    at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:184)
    at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:215)
    at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:197)
    at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:215)
    at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:184)
    at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:215)
    at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:215)
    at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:215)
    at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:184)
    at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:215)
    at java.base/java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:1024)
    at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:807)
    at java.base/java.util.stream.ReferencePipeline$7$1FlatMap.accept(ReferencePipeline.java:294)
    at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:215)
    at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:215)
    at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:215)
    at java.base/java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:1024)
    at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:570)
    at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:560)
    at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151)
    at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174)
    at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:265)
    at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:636)
    at java.base/java.util.stream.ReferencePipeline$7$1FlatMap.accept(ReferencePipeline.java:294)
    at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:215)
    at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:215)
    at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:215)
    at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1716)
    at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:570)
    at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:560)
    at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151)
    at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174)
    at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:265)
    at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:636)
    at java.base/java.util.stream.ReferencePipeline$7$1FlatMap.accept(ReferencePipeline.java:294)
    at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1716)
    at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:570)
    at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:560)
    at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151)
    at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174)
    at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:265)
    at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:636)
    at java.base/java.util.ArrayList.forEach(ArrayList.java:1604)
    at java.base/java.util.ArrayList.forEach(ArrayList.java:1604)
FAILED VirtualThreadSchedulerMXBeanTest::testReduceParallelism '[2] MXBeanProxy(com.sun.jmx.mbeanserver.JmxMBeanServer@74fd34be[jdk.management:type=VirtualThreadScheduler])'