NativeLibraryTest.java fails intermittently, unloaded count is not same as expected

java/lang/ClassLoader/nativeLibrary/NativeLibraryTest.java fails intermittently:

#section:main
----------messages:(4/199)----------
command: main -Xcheck:jni NativeLibraryTest
reason: User specified action: run main/othervm/native -Xcheck:jni NativeLibraryTest
Mode: othervm [/othervm specified]
elapsed time (seconds): 2.248
----------configuration:(0/0)----------
----------System.out:(0/0)----------
----------System.err:(13/850)----------
java.lang.RuntimeException: Expected unloaded=4 but got=3
at NativeLibraryTest.main(NativeLibraryTest.java:65)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:564)
at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:115)
at java.base/java.lang.Thread.run(Thread.java:842)