JBOSS EAP 6.4 - WebSocket Error

[webmaster-3]

Hello,

I created a web application with websocket (EchoWebSocket).

in the file jboss-web.xml I enabled the websocket

<jboss-web>

    <enable-websockets>true</enable-websockets>

</jboss-web>

and i configured the web connector to use the NIO2 protocol

  <subsystem xmlns="urn:jboss:domain:web:2.2" default-virtual-server="default-host" native="false">

            <connector name="http" protocol="org.apache.coyote.http11.Http11NioProtocol" scheme="http" socket-binding="http"/>

            <virtual-server name="default-host" enable-welcome-root="true">

                <alias name="localhost"/>

                <alias name="example.com"/>

            </virtual-server>

        </subsystem>

if I use a JavaScript client application it works.

Instead if I use a C# client can it connects, but if I try to exchange messages I get the following exception

16:51:16,793 ERROR [org.apache.tomcat.websocket] (http-0.0.0.0:8080-118) JBWEB008809: No error handling configured for [com.wws.websocket.EchoWebSocket] and the following error occurred: java.nio.channels.ClosedChannelException

    at org.apache.coyote.http11.InternalNioInputBuffer$1.completed(InternalNioInputBuffer.java:122) [jbossweb-7.5.19.Final-redhat-1.jar:7.5.19.Final-redhat-1]

    at org.apache.coyote.http11.InternalNioInputBuffer$1.completed(InternalNioInputBuffer.java:117) [jbossweb-7.5.19.Final-redhat-1.jar:7.5.19.Final-redhat-1]

    at org.apache.tomcat.util.net.NioChannel$1.completed(NioChannel.java:680) [jbossweb-7.5.19.Final-redhat-1.jar:7.5.19.Final-redhat-1]

    at org.apache.tomcat.util.net.NioChannel$1.completed(NioChannel.java:676) [jbossweb-7.5.19.Final-redhat-1.jar:7.5.19.Final-redhat-1]

    at sun.nio.ch.Invoker.invokeUnchecked(Invoker.java:126) [rt.jar:1.7.0_75]

    at sun.nio.ch.Invoker$2.run(Invoker.java:218) [rt.jar:1.7.0_75]

    at sun.nio.ch.AsynchronousChannelGroupImpl$1.run(AsynchronousChannelGroupImpl.java:112) [rt.jar:1.7.0_75]

    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [rt.jar:1.7.0_75]

    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [rt.jar:1.7.0_75]

    at org.apache.tomcat.util.net.NioEndpoint$DefaultThreadFactory$1$1.run(NioEndpoint.java:1250) [jbossweb-7.5.19.Final-redhat-1.jar:7.5.19.Final-redhat-1]

    at java.lang.Thread.run(Thread.java:745) [rt.jar:1.7.0_75]

Why????

the same application works with Jboss EAP 7.0!!!

Thank you