Spotted in the CI job set jdk11-jdk-919:

tools/javac/modules/AnnotationProcessing.java

failed due to:

16 tests, 1 errors
java.lang.Exception: 1 errors found
at toolbox.TestRunner.runTests(TestRunner.java:116)
at ModuleTestBase.runTests(ModuleTestBase.java:49)
at AnnotationProcessing.main(AnnotationProcessing.java:98)
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:566)
at com.sun.javatest.regtest.agent.MainActionHelper$SameVMRunnable.run(MainActionHelper.java:229)
at java.base/java.lang.Thread.run(Thread.java:834)

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

result: Failed. Execution failed: `main' threw exception: java.lang.Exception: 1 errors found


test result: Failed. Execution failed: `main' threw exception: java.lang.Exception: 1 errors found

Root cause is indicated in this stack trace:

Exception running test testGenerateInMultiModeAPI: java.nio.file.DirectoryNotEmptyException: testGenerateInMultiModeAPI\\classes\\m1x
java.nio.file.DirectoryNotEmptyException: testGenerateInMultiModeAPI\\classes\\m1x
at java.base/sun.nio.fs.WindowsFileSystemProvider.implDelete(WindowsFileSystemProvider.java:267)
at java.base/sun.nio.fs.AbstractFileSystemProvider.delete(AbstractFileSystemProvider.java:105)
at java.base/java.nio.file.Files.delete(Files.java:1140)
at toolbox.ToolBox$1.postVisitDirectory(ToolBox.java:276)
at toolbox.ToolBox$1.postVisitDirectory(ToolBox.java:263)
at java.base/java.nio.file.Files.walkFileTree(Files.java:2741)
at java.base/java.nio.file.Files.walkFileTree(Files.java:2795)
at toolbox.ToolBox.cleanDirectory(ToolBox.java:263)
at AnnotationProcessing.runCompiler(AnnotationProcessing.java:998)
at AnnotationProcessing.runCompiler(AnnotationProcessing.java:984)

This means we really need to fix ToolBox.cleanDirectory to work on Windows.