JLinkMultiReleaseJarTest.java fails intermittently at the final clean up

tools/jlink/multireleasejar/JLinkMultiReleaseJarTest.java fails intermittently with java.io.UncheckedIOException: java.nio.file.DirectoryNotEmptyException:

----------System.out:(76/5282)*----------
[TestNG] Running:
  tools/jlink/multireleasejar/JLinkMultiReleaseJarTest.java

config JLinkMultiReleaseJarTest.initialize(): success
test JLinkMultiReleaseJarTest.basicTest(): success
java.logging found in image

test JLinkMultiReleaseJarTest.loggingTest(): success
java.logging not found in image

test JLinkMultiReleaseJarTest.noLoggingTest(): success
config JLinkMultiReleaseJarTest.close(): failure
java.io.UncheckedIOException: java.nio.file.DirectoryNotEmptyException: C:\\Users\\aurora\\sandbox_keepme\\results\\run_74\\tier2\\JTwork\\jdk_test\\scratch\\1\\logging-image\\bin
at JLinkMultiReleaseJarTest.lambda$close$6(JLinkMultiReleaseJarTest.java:153)
at java.util.stream.ForEachOps$ForEachOp$OfRef.accept(java.base@9-ea/ForEachOps.java:184)
at java.util.stream.ReferencePipeline$2$1.accept(java.base@9-ea/ReferencePipeline.java:177)
at java.util.stream.ReferencePipeline$3$1.accept(java.base@9-ea/ReferencePipeline.java:195)
at java.util.Iterator.forEachRemaining(java.base@9-ea/Iterator.java:120)
at java.util.Spliterators$IteratorSpliterator.forEachRemaining(java.base@9-ea/Spliterators.java:1801)
at java.util.stream.AbstractPipeline.copyInto(java.base@9-ea/AbstractPipeline.java:484)
at java.util.stream.AbstractPipeline.wrapAndCopyInto(java.base@9-ea/AbstractPipeline.java:474)
at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(java.base@9-ea/ForEachOps.java:151)
at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(java.base@9-ea/ForEachOps.java:174)
at java.util.stream.AbstractPipeline.evaluate(java.base@9-ea/AbstractPipeline.java:234)
at java.util.stream.ReferencePipeline.forEach(java.base@9-ea/ReferencePipeline.java:430)
at JLinkMultiReleaseJarTest.close(JLinkMultiReleaseJarTest.java:145)
at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(java.base@9-ea/Native Method)
at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(java.base@9-ea/NativeMethodAccessorImpl.java:62)
at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(java.base@9-ea/DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(java.base@9-ea/Method.java:537)
at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:85)
at org.testng.internal.Invoker.invokeConfigurationMethod(Invoker.java:510)
at org.testng.internal.Invoker.invokeConfigurations(Invoker.java:211)
at org.testng.internal.Invoker.invokeConfigurations(Invoker.java:138)
at org.testng.internal.TestMethodWorker.invokeAfterClassMethods(TestMethodWorker.java:220)
at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:111)
at org.testng.TestRunner.privateRun(TestRunner.java:773)
at org.testng.TestRunner.run(TestRunner.java:623)
at org.testng.SuiteRunner.runTest(SuiteRunner.java:357)
at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:352)
at org.testng.SuiteRunner.privateRun(SuiteRunner.java:310)
at org.testng.SuiteRunner.run(SuiteRunner.java:259)
at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86)
at org.testng.TestNG.runSuitesSequentially(TestNG.java:1185)
at org.testng.TestNG.runSuitesLocally(TestNG.java:1110)
at org.testng.TestNG.run(TestNG.java:1018)
at com.sun.javatest.regtest.TestNGAction$TestNGRunner.main(TestNGAction.java:220)
at jdk.internal.reflect.GeneratedMethodAccessor15.invoke(Unknown Source)
at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(java.base@9-ea/DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(java.base@9-ea/Method.java:537)
at com.sun.javatest.regtest.agent.MainActionHelper$SameVMRunnable.run(MainActionHelper.java:226)
at java.lang.Thread.run(java.base@9-ea/Thread.java:844)
Caused by: java.nio.file.DirectoryNotEmptyException: C:\\Users\\aurora\\sandbox_keepme\\results\\run_74\\tier2\\JTwork\\jdk_test\\scratch\\1\\logging-image\\bin
at sun.nio.fs.WindowsFileSystemProvider.implDelete(java.base@9-ea/WindowsFileSystemProvider.java:267)
at sun.nio.fs.AbstractFileSystemProvider.delete(java.base@9-ea/AbstractFileSystemProvider.java:105)
at java.nio.file.Files.delete(java.base@9-ea/Files.java:1129)
at jdk.testlibrary.FileUtils.deleteFileWithRetry0(FileUtils.java:103)
at jdk.testlibrary.FileUtils.access$000(FileUtils.java:41)
at jdk.testlibrary.FileUtils$1.postVisitDirectory(FileUtils.java:173)
at jdk.testlibrary.FileUtils$1.postVisitDirectory(FileUtils.java:157)
at java.nio.file.Files.walkFileTree(java.base@9-ea/Files.java:2713)
at java.nio.file.Files.walkFileTree(java.base@9-ea/Files.java:2767)
at jdk.testlibrary.FileUtils.deleteFileTreeUnchecked(FileUtils.java:157)
at jdk.testlibrary.FileUtils.deleteFileTreeWithRetry(FileUtils.java:144)
at JLinkMultiReleaseJarTest.lambda$close$6(JLinkMultiReleaseJarTest.java:148)
... 39 more
Suppressed: java.nio.file.DirectoryNotEmptyException: C:\\Users\\aurora\\sandbox_keepme\\results\\run_74\\tier2\\JTwork\\jdk_test\\scratch\\1\\logging-image
... 51 more

===============================================
tools/jlink/multireleasejar/JLinkMultiReleaseJarTest.java
Total tests run: 3, Failures: 0, Skips: 0
Configuration Failures: 1, Skips: 0
===============================================

----------System.err:(22/1442)----------
warning - entry META-INF/versions/9/q/PublicClass.class is a public class in a concealed package,
placing this jar on the class path will result in incompatible public interfaces
warning - entry: META-INF/versions/9/resource.txt, multiple resources with same name
warning - entry META-INF/versions/9/q/PublicClass.class is a public class in a concealed package,
placing this jar on the class path will result in incompatible public interfaces
warning - entry: META-INF/versions/9/resource.txt, multiple resources with same name
warning - entry META-INF/versions/9/q/PublicClass.class is a public class in a concealed package,
placing this jar on the class path will result in incompatible public interfaces
warning - entry: META-INF/versions/9/resource.txt, multiple resources with same name


java.lang.Exception: failures: 0
at com.sun.javatest.regtest.TestNGAction$TestNGRunner.main(TestNGAction.java:223)
at jdk.internal.reflect.GeneratedMethodAccessor15.invoke(Unknown Source)
at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(java.base@9-ea/DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(java.base@9-ea/Method.java:537)
at com.sun.javatest.regtest.agent.MainActionHelper$SameVMRunnable.run(MainActionHelper.java:226)
at java.lang.Thread.run(java.base@9-ea/Thread.java:844)

JavaTest Message: Test threw exception: java.lang.Exception
JavaTest Message: shutting down test

result: Failed. Execution failed: `main' threw exception: java.lang.Exception: failures: 0