Intermittent java.io.IOException: UT010029: Stream is closed in Java EE 7 using provided undertow, resteasy, and jackson

When using Java EE 7, rest, jackson, with an AngularJS front end there's an intermittent exception when accessing REST endpoints. The exception stack trace in DEBUG level is here: http://pastebin.com/xjqMMkns . A reproducer can be found here https://github.com/ge0ffrey/optaconf .

The exception seems to not affect the expected behavior of my application. I did see something similar for JBoss EAP 6.3.0 being categorized as blocker level due to the exception log level being inappropriate.