Isn't that the same error that happens only on your mac also in few other cases?

Can you try on any other platform?

Sent from my Phone

From: Ales Justin
Sent: ‎27.‎12.‎2013 14:14
To: Wildfly Dev mailing list
Subject: [wildfly-dev] xnio selection err

While using UnderTow's JSR WebSockets,
implementing simple chat app, between 2 diff browsers (Chrome and Safari),
I get a flood of these log lines:

14:09:22,890 WARN  [org.xnio.nio.selector] (default I/O-3) XNIO008000: Received an I/O error on selection: Invalid argument

Any idea?