Stack shows

"MainThread" #26 [3992568] prio=5 os_prio=0 cpu=123.63ms elapsed=480.35s allocated=1091K defined_classes=124 tid=0x0000ffffac127220 nid=3992568 runnable [0x0000ffff81d27000]
   java.lang.Thread.State: RUNNABLE
at com.sun.media.sound.DirectAudioDevice.nOpen(java.desktop@27-ea/Native Method)
at com.sun.media.sound.DirectAudioDevice$DirectDL.implOpen(java.desktop@27-ea/DirectAudioDevice.java:467)
at com.sun.media.sound.DirectAudioDevice$DirectClip.implOpen(java.desktop@27-ea/DirectAudioDevice.java:1219)
at com.sun.media.sound.AbstractDataLine.open(java.desktop@27-ea/AbstractDataLine.java:115)
- locked <0x00000000d0552d98> (a com.sun.media.sound.DirectAudioDevice)
at com.sun.media.sound.DirectAudioDevice$DirectClip.open(java.desktop@27-ea/DirectAudioDevice.java:1019)
- locked <0x00000000d0552d98> (a com.sun.media.sound.DirectAudioDevice)
at com.sun.media.sound.DirectAudioDevice$DirectClip.open(java.desktop@27-ea/DirectAudioDevice.java:990)
at com.sun.media.sound.JavaSoundAudioClipDelegate.startImpl(java.desktop@27-ea/JavaSoundAudioClipDelegate.java:175)
- locked <0x00000000d0542e50> (a com.sun.media.sound.JavaSoundAudioClipDelegate)
at com.sun.media.sound.JavaSoundAudioClipDelegate.loop(java.desktop@27-ea/JavaSoundAudioClipDelegate.java:156)
- locked <0x00000000d0542e50> (a com.sun.media.sound.JavaSoundAudioClipDelegate)
at com.sun.media.sound.JavaSoundAudioClip.loop(java.desktop@27-ea/JavaSoundAudioClip.java:94)
- locked <0x00000000d053e200> (a com.sun.media.sound.JavaSoundAudioClip)
at javax.sound.SoundClip.loop(java.desktop@27-ea/SoundClip.java:134)
at AutoCloseTimeCheck.testSmallDelay(AutoCloseTimeCheck.java:88)
at AutoCloseTimeCheck.main(AutoCloseTimeCheck.java:57)
at java.lang.invoke.LambdaForm$DMH/0x00007ffc01042000.invokeStatic(java.base@27-ea/LambdaForm$DMH)
at java.lang.invoke.LambdaForm$MH/0x00007ffc01043400.invoke(java.base@27-ea/LambdaForm$MH)
at java.lang.invoke.Invokers$Holder.invokeExact_MT(java.base@27-ea/Invokers$Holder)
at jdk.internal.reflect.DirectMethodHandleAccessor.invokeImpl(java.base@27-ea/DirectMethodHandleAccessor.java:155)
at jdk.internal.reflect.DirectMethodHandleAccessor.invoke(java.base@27-ea/DirectMethodHandleAccessor.java:104)
at java.lang.reflect.Method.invoke(java.base@27-ea/Method.java:565)
at com.sun.javatest.regtest.agent.MainWrapper$MainTask.run(MainWrapper.java:138)
at java.lang.Thread.runWith(java.base@27-ea/Thread.java:1529)
at java.lang.Thread.run(java.base@27-ea/Thread.java:1516)