Upgrade xnio to 3.0.9 or later to resolve the linked issues
https://github.com/jbossas/jboss-eap/pull/728
DR0 contains XNIO version 3.1.0.Final. Verified.
The original upgrade in https://github.com/jbossas/jboss-eap/pull/728 was done to 3.10.0 for DR0, which was not the intent, as specified in this BZ. I checked with David Lloyd and 3.10.0 brings in too much. https://github.com/jbossas/jboss-eap/pull/1025 puts it back to 3.0.9.GA
6.3.0 DR4 contains xnio version 3.0.9.GA.