It is not possible to upload files with the ace:fileEntry component on Jetty 9. ICE-10570 mentions similar issues with Jetty 9 and ICEfaces 4. When trying to upload a file the following error stack trace is thrown:

[STDERR] java.io.FileNotFoundException: C:\tmp\C:\Praca\BMC\workspaceR7.0\ICEfacesBasedOnOwui\src\main\webapp\mc3jznemooxn3rs48rva4v79\ice_file_8844744077071998930.tmp (The filename, directory name, or volume label syntax is incorrect)
[STDERR] at java.io.FileInputStream.open(Native Method)
[STDERR] at java.io.FileInputStream.<init>(FileInputStream.java:146)
[STDERR] at org.eclipse.jetty.util.MultiPartInputStreamParser$MultiPart.getInputStream(MultiPartInputStreamParser.java:203)
[STDERR] at org.icefaces.ace.component.fileentry.FileEntryUpload$PartFile.transferFile(FileEntryUpload.java:787)
[STDERR] at org.icefaces.ace.component.fileentry.FileEntryUpload.uploadFile(FileEntryUpload.java:416)
[STDERR] at org.icefaces.ace.component.fileentry.FileEntryUpload.handleMultipartPortion(FileEntryUpload.java:271)
[STDERR] at org.icefaces.ace.component.fileentry.FileEntryUpload.afterPhase(FileEntryUpload.java:138)
[STDERR] at com.sun.faces.lifecycle.Phase.handleAfterPhase(Phase.java:189)
[STDERR] at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:107)
[STDERR] at com.sun.faces.lifecycle.RestoreViewPhase.doPhase(RestoreViewPhase.java:116)
[STDERR] at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)
[STDERR] at javax.faces.webapp.FacesServlet.service(FacesServlet.java:593)
[STDERR] at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:800)
[STDERR] at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:587)
[STDERR] at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
[STDERR] at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:577)
[STDERR] at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:223)
[STDERR] at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1127)
[STDERR] at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:515)
[STDERR] at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)
[STDERR] at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1061)
[STDERR] at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
[STDERR] at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:215)
[STDERR] at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:110)
[STDERR] at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)
[STDERR] at org.eclipse.jetty.server.Server.handle(Server.java:497)
[STDERR] at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:310)
[STDERR] at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:245)
[STDERR] at org.eclipse.jetty.io.AbstractConnection$2.run(AbstractConnection.java:540)
[STDERR] at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:635)
[STDERR] at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:555)
[STDERR] at java.lang.Thread.run(Thread.java:745)