Looks like https://github.com/elastic/elasticsearch/issues/86382 but that should have been fixed in May.

**Build scan:**
https://gradle-enterprise.elastic.co/s/xb7cxwzdk6es6/tests/:libs:elasticsearch-core:test/org.elasticsearch.core.internal.provider.EmbeddedImplClassLoaderTests/classMethod

**Reproduction line:**
`null`

**Applicable branches:**
main

**Reproduces locally?:**
Didn't try

**Failure history:**
https://gradle-enterprise.elastic.co/scans/tests?tests.container=org.elasticsearch.core.internal.provider.EmbeddedImplClassLoaderTests&tests.test=classMethod

**Failure excerpt:**
```
java.io.IOException: Could not remove the following files (in the order of attempts):
   C:\Users\jenkins\workspace\platform-support\253\libs\core\build\testrun\test\temp\org.elasticsearch.core.internal.provider.EmbeddedImplClassLoaderTests_E8BB9E0290B7F7A7-001\testResourcesParentNonPkgName-001\parent.jar: java.nio.file.FileSystemException: C:\Users\jenkins\workspace\platform-support\253\libs\core\build\testrun\test\temp\org.elasticsearch.core.internal.provider.EmbeddedImplClassLoaderTests_E8BB9E0290B7F7A7-001\testResourcesParentNonPkgName-001\parent.jar: The process cannot access the file because it is being used by another process
   C:\Users\jenkins\workspace\platform-support\253\libs\core\build\testrun\test\temp\org.elasticsearch.core.internal.provider.EmbeddedImplClassLoaderTests_E8BB9E0290B7F7A7-001\testResourcesParentNonPkgName-001: java.nio.file.DirectoryNotEmptyException: C:\Users\jenkins\workspace\platform-support\253\libs\core\build\testrun\test\temp\org.elasticsearch.core.internal.provider.EmbeddedImplClassLoaderTests_E8BB9E0290B7F7A7-001\testResourcesParentNonPkgName-001
   C:\Users\jenkins\workspace\platform-support\253\libs\core\build\testrun\test\temp\org.elasticsearch.core.internal.provider.EmbeddedImplClassLoaderTests_E8BB9E0290B7F7A7-001\testResourcesParentJavaPkgName-001\parent.jar: java.nio.file.FileSystemException: C:\Users\jenkins\workspace\platform-support\253\libs\core\build\testrun\test\temp\org.elasticsearch.core.internal.provider.EmbeddedImplClassLoaderTests_E8BB9E0290B7F7A7-001\testResourcesParentJavaPkgName-001\parent.jar: The process cannot access the file because it is being used by another process
   C:\Users\jenkins\workspace\platform-support\253\libs\core\build\testrun\test\temp\org.elasticsearch.core.internal.provider.EmbeddedImplClassLoaderTests_E8BB9E0290B7F7A7-001\testResourcesParentJavaPkgName-001: java.nio.file.DirectoryNotEmptyException: C:\Users\jenkins\workspace\platform-support\253\libs\core\build\testrun\test\temp\org.elasticsearch.core.internal.provider.EmbeddedImplClassLoaderTests_E8BB9E0290B7F7A7-001\testResourcesParentJavaPkgName-001
   C:\Users\jenkins\workspace\platform-support\253\libs\core\build\testrun\test\temp\org.elasticsearch.core.internal.provider.EmbeddedImplClassLoaderTests_E8BB9E0290B7F7A7-001: java.nio.file.DirectoryNotEmptyException: C:\Users\jenkins\workspace\platform-support\253\libs\core\build\testrun\test\temp\org.elasticsearch.core.internal.provider.EmbeddedImplClassLoaderTests_E8BB9E0290B7F7A7-001

  at __randomizedtesting.SeedInfo.seed([E8BB9E0290B7F7A7]:0)
  at org.apache.lucene.util.IOUtils.rm(IOUtils.java:341)
  at org.apache.lucene.tests.util.TestRuleTemporaryFilesCleanup.afterAlways(TestRuleTemporaryFilesCleanup.java:209)
  at com.carrotsearch.randomizedtesting.rules.TestRuleAdapter$1.afterAlways(TestRuleAdapter.java:31)
  at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:43)
  at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
  at org.apache.lucene.tests.util.TestRuleAssertionsRequired$1.evaluate(TestRuleAssertionsRequired.java:53)
  at org.apache.lucene.tests.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:43)
  at org.apache.lucene.tests.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:44)
  at org.apache.lucene.tests.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:60)
  at org.apache.lucene.tests.util.TestRuleIgnoreTestSuites$1.evaluate(TestRuleIgnoreTestSuites.java:47)
  at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
  at com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:390)
  at com.carrotsearch.randomizedtesting.ThreadLeakControl.lambda$forkTimeoutingTask$0(ThreadLeakControl.java:850)
  at java.lang.Thread.run(Thread.java:833)

```
libs/core/src/test/java/org/elasticsearch/core/internal/provider/EmbeddedImplClassLoaderTests.java
jarEntries.put("IMPL-JARS/blah/LISTING.TXT", "foo.jar\nbar.jar\nbaz.jar");
        jarEntries.put("IMPL-JARS/blah/foo.jar/res.txt", "fooRes");
        jarEntries.put("IMPL-JARS/blah/bar.jar/META-INF/MANIFEST.MF", "Multi-Release: TRUE\n");
        jarEntries.put("IMPL-JARS/blah/bar.jar/META-INF/versions/9/res.txt", "barRes");
        jarEntries.put("IMPL-JARS/blah/baz.jar/META-INF/MANIFEST.MF", "Multi-Release: trUE\n");
        jarEntries.put("IMPL-JARS/blah/baz.jar/META-INF/versions/11/res.txt", "bazRes");
        Path outerJar = topLevelDir.resolve("impl.jar");
        JarUtils.createJarWithEntriesUTF(outerJar, jarEntries);
        URL[] urls = new URL[] { outerJar.toUri().toURL() };
        URLClassLoader parent = URLClassLoader.newInstance(urls, EmbeddedImplClassLoaderTests.class.getClassLoader());
        try {
            EmbeddedImplClassLoader loader = EmbeddedImplClassLoader.getInstance(parent, "blah");
            var res = Collections.list(loader.getResources("res.txt"));
            assertThat(res, hasSize(3));
            List<String> l = res.stream().map(EmbeddedImplClassLoaderTests::urlToString).toList();
            assertThat(l, containsInAnyOrder("fooRes", "barRes", "bazRes"));
        } finally {
            PrivilegedOperations.closeURLClassLoader(parent);
        }
    }
    @SuppressForbidden(reason = "file urls")
    static String urlToString(URL url) {
        try {
            return new String(url.openStream().readAllBytes(), UTF_8);
        } catch (IOException e) {
            throw new UncheckedIOException(e);
        }
    }
}