When trying to start a server instance using $JBOSS_DIST/jboss-as/bin/run.sh I get this error:
JVMJ9VM007E Command-line option unrecognised: -server
Could not create the Java virtual machine.
This happens because IBM JDK doesn't support this option.
There is a condition in run.sh which should determine whether to use -server or not, but it doesn't work. See comments.