файл занят другим процессом Commons FileUpload Java

Либа commons fileupload.Есть код для загрузки файлов:

DiskFileItemFactory factory = new DiskFileItemFactory();
factory.setRepository(new File(System.getProperty("java.io.tmpdir")));
File uploadDir = new File(getRoot() + separator + tempDir);
if (!uploadDir.exists()) {
    uploadDir.mkdir();
}
ServletFileUpload upload = new ServletFileUpload(factory);
@SuppressWarnings("unchecked")
List<FileItem> items = upload.parseRequest(getRequest());
int findex = 0;
for (Object item1 : items) {
    FileItem item = (FileItem) item1;
    if (!item.isFormField()) {
        System.out.println(item.getName());
        File FILE = new File(uploadDir + separator + (new Date().getTime()+findex)+
               getFileExt(item.getName()));
        item.write(FILE);
        getFiles().addFile(new WebFile(getRoot(), getHashes(), item.getFieldName(), 
              FILE.getPath(), FILE.getName(), getFileExt(FILE)));
        findex++;
    }
}

Но проблема возникает тогда когда я хочу удалить загруженный, во временную папку, файл.

Удаляю файл я так: Files.deleteIfExists(FILE).

java.nio.file.FileSystemException: : Процесс не может получить доступ к файлу, так как этот файл занят другим процессом.
at sun.nio.fs.WindowsException.translateToIOException(WindowsException.java:86)
at sun.nio.fs.WindowsException.rethrowAsIOException(WindowsException.java:97)
at sun.nio.fs.WindowsException.rethrowAsIOException(WindowsException.java:102)
at sun.nio.fs.WindowsFileSystemProvider.implDelete(WindowsFileSystemProvider.java:269)
at sun.nio.fs.AbstractFileSystemProvider.deleteIfExists(AbstractFileSystemProvider.java:108)
at java.nio.file.Files.deleteIfExists(Files.java:1165)
at ru.tsyklop.web.WebFile.delete(WebFile.java:114)
at com.chat2help.model.AdminModel.AddSite(AdminModel.java:597)
at com.chat2help.model.AdminModel.execute(AdminModel.java:90)
at com.chat2help.controller.Controller.Admin(Controller.java:77)
at com.chat2help.controller.Server.doPost(Server.java:51)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:661)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at com.chat2help.filter.Server.doFilter(Server.java:170)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:478)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:650)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:803)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1459)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:748)