Bug 1097763

Description of problem:
The whiteboard websocket example from the javaee7 samples [1] produces java.lang.IndexOutOfBoundsException

[1] https://github.com/javaee-samples/javaee7-samples/tree/master/websocket/whiteboard

Version-Release number of selected component (if applicable):
jboss-eap-6.3.0.ER4.zip

How reproducible:
100%

Steps to Reproduce:
1. Download the whiteboard websocket sample [1]
2. build a war: 'mvn package -DskipTests'
3. add jboss-web.xml to the war /WEB-INF (see [2])
4. start EAP6.3.0.ER4
5. enable the NIO2 protocol (see [3]), don't forget to reload the server
6. deploy the whiteboard.war app
7. open http://localhost:8080/whiteboard in two separate browsers
8. deselect the "Online" checkbox and draw some shapes in the whiteboard
9. click "Snapshot"

[2] http://blog.arungupta.me/2014/05/websocket-jboss-eap-6-3/
[3] http://documentation-devel.engineering.redhat.com/site/documentation/en-US/JBoss_Enterprise_Application_Platform/6.3/html-single/Development_Guide/index.html#Create_a_Websocket_Application

Actual results:
Exception in server log:
15:10:21,865 ERROR [stderr] (http-/127.0.0.1:8080-34) Exception in thread "http-/127.0.0.1:8080-34" java.lang.IndexOutOfBoundsException
15:10:21,866 ERROR [stderr] (http-/127.0.0.1:8080-34) 	at java.nio.Buffer.checkBounds(Buffer.java:559)
15:10:21,866 ERROR [stderr] (http-/127.0.0.1:8080-34) 	at java.nio.DirectByteBuffer.get(DirectByteBuffer.java:259)
15:10:21,867 ERROR [stderr] (http-/127.0.0.1:8080-34) 	at org.apache.coyote.http11.InternalNioInputBuffer$1.completed(InternalNioInputBuffer.java:121)
15:10:21,867 ERROR [stderr] (http-/127.0.0.1:8080-34) 	at org.apache.coyote.http11.InternalNioInputBuffer$1.completed(InternalNioInputBuffer.java:110)
15:10:21,867 ERROR [stderr] (http-/127.0.0.1:8080-34) 	at org.apache.tomcat.util.net.NioChannel$1.completed(NioChannel.java:671)
15:10:21,867 ERROR [stderr] (http-/127.0.0.1:8080-34) 	at org.apache.tomcat.util.net.NioChannel$1.completed(NioChannel.java:667)
15:10:21,868 ERROR [stderr] (http-/127.0.0.1:8080-34) 	at sun.nio.ch.Invoker.invokeUnchecked(Invoker.java:126)
15:10:21,868 ERROR [stderr] (http-/127.0.0.1:8080-34) 	at sun.nio.ch.Invoker$2.run(Invoker.java:218)
15:10:21,868 ERROR [stderr] (http-/127.0.0.1:8080-34) 	at sun.nio.ch.AsynchronousChannelGroupImpl$1.run(AsynchronousChannelGroupImpl.java:112)
15:10:21,869 ERROR [stderr] (http-/127.0.0.1:8080-34) 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
15:10:21,869 ERROR [stderr] (http-/127.0.0.1:8080-34) 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
15:10:21,869 ERROR [stderr] (http-/127.0.0.1:8080-34) 	at java.lang.Thread.run(Thread.java:744)

Expected results:
The picture from the whiteboard is transferred to the whiteboard on the other browser.