Our application is trying to load the "com.sun.security.auth.module.UnixSystem" during runtime (something different on Windows and Solaris, just saying)
and since the upgrade to EAP8 we are getting a ClassNotFoundException for "UnixSystem" (with jdk11 and 17).
I confirmed via JShell that the JDKs on the machine definitely contains the class :)
Assumption is the we have to enable/active something in a deployment-structure.xml or similar!?
Typical "you probably shouldn't use JDK types" response, but you'd need to add a module dependency on jdk.security.auth.