[JENKINS] Lucene-Solr-7.x-Windows (64bit/jdk-9.0.1) - Build # 502 - Failure!

[Policeman Jenkins Server <je...@thetaphi.de>]

Build: https://jenkins.thetaphi.de/job/Lucene-Solr-7.x-Windows/502/
Java: 64bit/jdk-9.0.1 -XX:+UseCompressedOops -XX:+UseG1GC

No tests ran.

Build Log:
[...truncated 13 lines...]
FATAL: Could not delete file C:\Users\jenkins\workspace\Lucene-Solr-7.x-Windows\solr\build.repro\solr-core\classes\java\org\apache\solr\internal
java.io.IOException: Could not delete file C:\Users\jenkins\workspace\Lucene-Solr-7.x-Windows\solr\build.repro\solr-core\classes\java\org\apache\solr\internal
	at org.eclipse.jgit.util.FileUtils.delete(FileUtils.java:197)
	at org.eclipse.jgit.util.FileUtils.delete(FileUtils.java:166)
	at org.eclipse.jgit.util.FileUtils.delete(FileUtils.java:166)
	at org.eclipse.jgit.util.FileUtils.delete(FileUtils.java:166)
	at org.eclipse.jgit.util.FileUtils.delete(FileUtils.java:166)
	at org.eclipse.jgit.util.FileUtils.delete(FileUtils.java:166)
	at org.eclipse.jgit.util.FileUtils.delete(FileUtils.java:166)
	at org.eclipse.jgit.util.FileUtils.delete(FileUtils.java:166)
	at org.eclipse.jgit.api.CleanCommand.cleanPath(CleanCommand.java:176)
	at org.eclipse.jgit.api.CleanCommand.call(CleanCommand.java:133)
Also:   hudson.remoting.Channel$CallSiteStackTrace: Remote call to Windows VBOX
		at hudson.remoting.Channel.attachCallSiteStackTrace(Channel.java:1737)
		at hudson.remoting.UserResponse.retrieve(UserRequest.java:313)
		at hudson.remoting.Channel.call(Channel.java:952)
		at hudson.remoting.RemoteInvocationHandler.invoke(RemoteInvocationHandler.java:278)
		at com.sun.proxy.$Proxy65.clean(Unknown Source)
		at org.jenkinsci.plugins.gitclient.RemoteGitImpl.clean(RemoteGitImpl.java:450)
		at hudson.plugins.git.extensions.impl.CleanBeforeCheckout.decorateFetchCommand(CleanBeforeCheckout.java:30)
		at hudson.plugins.git.GitSCM.fetchFrom(GitSCM.java:858)
		at hudson.plugins.git.GitSCM.retrieveChanges(GitSCM.java:1129)
		at hudson.plugins.git.GitSCM.checkout(GitSCM.java:1160)
		at hudson.scm.SCM.checkout(SCM.java:504)
		at hudson.model.AbstractProject.checkout(AbstractProject.java:1208)
		at hudson.model.AbstractBuild$AbstractBuildExecution.defaultCheckout(AbstractBuild.java:574)
		at jenkins.scm.SCMCheckoutStrategy.checkout(SCMCheckoutStrategy.java:86)
		at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:499)
		at hudson.model.Run.execute(Run.java:1727)
		at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
		at hudson.model.ResourceController.execute(ResourceController.java:97)
		at hudson.model.Executor.run(Executor.java:429)
Caused: org.eclipse.jgit.api.errors.JGitInternalException: Could not delete file C:\Users\jenkins\workspace\Lucene-Solr-7.x-Windows\solr\build.repro\solr-core\classes\java\org\apache\solr\internal
	at org.eclipse.jgit.api.CleanCommand.call(CleanCommand.java:136)
	at org.jenkinsci.plugins.gitclient.JGitAPIImpl.clean(JGitAPIImpl.java:1290)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at hudson.remoting.RemoteInvocationHandler$RPCRequest.perform(RemoteInvocationHandler.java:927)
	at hudson.remoting.RemoteInvocationHandler$RPCRequest.call(RemoteInvocationHandler.java:901)
	at hudson.remoting.RemoteInvocationHandler$RPCRequest.call(RemoteInvocationHandler.java:850)
	at hudson.remoting.UserRequest.perform(UserRequest.java:210)
	at hudson.remoting.UserRequest.perform(UserRequest.java:53)
	at hudson.remoting.Request$2.run(Request.java:364)
	at hudson.remoting.InterceptingExecutorService$1.call(InterceptingExecutorService.java:72)
	at java.util.concurrent.FutureTask.run(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	at java.lang.Thread.run(Unknown Source)
Archiving artifacts
[WARNINGS] Skipping publisher since build result is FAILURE
Recording test results
ERROR: Step ‘Publish JUnit test result report’ failed: Test reports were found but none of them are new. Did leafNodes run? 
For example, C:\Users\jenkins\workspace\Lucene-Solr-7.x-Windows\solr\build.repro\solr-core\test\TEST-org.apache.solr.handler.component.DistributedTermsComponentTest-2.xml is 9 hr 33 min old

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Sending email for trigger: Failure - Any