On the Mobi demos where video or audio files can be uploaded (Camcorder/ Microphone), a server error is seen in the log each time user uploads a file, although there are no functional issues with these demos.
This is not an issue on Tomcat7.

For deployment onto WildFly 8.1.0, the showcase.war file was built with "web-profile" ant target, and the multipart-config tag was added to the web.xml, using servlet 3.0 configuration:
<multipart-config>
             <max-file-size>52428800</max-file-size>
             <max-request-size>52428800</max-request-size>
             <file-size-threshold>0</file-size-threshold>
</multipart-config>


2014-10-23 17:17:12,784 ERROR [io.undertow.request] (default task-12) Blocking request failed HttpServerExchange{ GET /showcase/javax.faces.resource/44f2499b-60df-46c3-98f4-68b88a4b091a.jsf;jsessionid=agwuIDkqVJaB22396fojk7TS}: java.lang.RuntimeException: java.io.IOException: Broken pipe
    at io.undertow.servlet.spec.HttpServletResponseImpl.responseDone(HttpServletResponseImpl.java:527)
    at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:287)
    at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:227)
    at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:73)
    at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:146)
    at io.undertow.server.Connectors.executeRootHandler(Connectors.java:177)
    at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:727)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) [rt.jar:1.7.0_07]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) [rt.jar:1.7.0_07]
    at java.lang.Thread.run(Thread.java:722) [rt.jar:1.7.0_07]
Caused by: java.io.IOException: Broken pipe
    at sun.nio.ch.FileDispatcherImpl.write0(Native Method) [rt.jar:1.7.0_07]
    at sun.nio.ch.SocketDispatcher.write(SocketDispatcher.java:47) [rt.jar:1.7.0_07]
    at sun.nio.ch.IOUtil.writeFromNativeBuffer(IOUtil.java:89) [rt.jar:1.7.0_07]
    at sun.nio.ch.IOUtil.write(IOUtil.java:46) [rt.jar:1.7.0_07]
    at sun.nio.ch.SocketChannelImpl.write(SocketChannelImpl.java:450) [rt.jar:1.7.0_07]
    at org.xnio.nio.NioSocketConduit.write(NioSocketConduit.java:150) [xnio-nio-3.2.2.Final.jar:3.2.2.Final]
    at io.undertow.server.protocol.http.HttpResponseConduit.write(HttpResponseConduit.java:531)
    at io.undertow.conduits.AbstractFixedLengthStreamSinkConduit.write(AbstractFixedLengthStreamSinkConduit.java:104)
    at org.xnio.conduits.Conduits.writeFinalBasic(Conduits.java:132) [xnio-api-3.2.2.Final.jar:3.2.2.Final]
    at io.undertow.conduits.AbstractFixedLengthStreamSinkConduit.writeFinal(AbstractFixedLengthStreamSinkConduit.java:161)
    at org.xnio.conduits.ConduitStreamSinkChannel.writeFinal(ConduitStreamSinkChannel.java:104) [xnio-api-3.2.2.Final.jar:3.2.2.Final]
    at io.undertow.channels.DetachableStreamSinkChannel.writeFinal(DetachableStreamSinkChannel.java:172)
    at io.undertow.servlet.spec.ServletOutputStreamImpl.writeBufferBlocking(ServletOutputStreamImpl.java:582)
    at io.undertow.servlet.spec.ServletOutputStreamImpl.close(ServletOutputStreamImpl.java:616)
    at io.undertow.servlet.spec.HttpServletResponseImpl.closeStreamAndWriter(HttpServletResponseImpl.java:451)
    at io.undertow.servlet.spec.HttpServletResponseImpl.responseDone(HttpServletResponseImpl.java:525)
    ... 9 more