Using https://github.com/lvc/japi-compliance-checker/, I found that there were API changes between XNIO 3.0.13.GA (the version in EAP 6.4.0) and XNIO 3.3.4.Final (the version in EAP 7.0.0.ER5). The number of changes is small, but maybe we should warn users about that in the Migration Guide? The XNIO API module is public.