[mkopecky@dhcp-10-40-4-197 bin]$ export JAVA_OPTS="--add-modules=java.se"
[mkopecky@dhcp-10-40-4-197 bin]$ ./domain.sh 
JAVA_OPTS already set in environment; overriding default settings with values: --add-modules=java.se
=========================================================================

  JBoss Bootstrap Environment

  JBOSS_HOME: /home/mkopecky/playground/wf/wfly.29/wfly.29

  JAVA: /home/mkopecky/base/jdk11_ea21_2018_08_01/bin/java

  JAVA_OPTS: -server --add-modules=java.se

=========================================================================

10:37:11,438 INFO  [org.jboss.modules] (main) JBoss Modules version 1.8.5.Final
10:37:11,659 INFO  [org.jboss.threads] (main) JBoss Threads version 2.3.2.Final
...
[Host Controller] WARNING: An illegal reflective access operation has occurred
[Host Controller] WARNING: Illegal reflective access by org.xnio.nio.NioXnio$2 (jar:file:/home/mkopecky/playground/wf/wfly.29/wfly.29/modules/system/layers/base/org/jboss/xnio/nio/main/xnio-nio-3.6.3.Final.jar!/) to constructor sun.nio.ch.EPollSelectorProvider()
[Host Controller] WARNING: Please consider reporting this to the maintainers of org.xnio.nio.NioXnio$2
[Host Controller] WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
[Host Controller] WARNING: All illegal access operations will be denied in a future release