ServerEnvironmentWrapper parses the value of the initial options used to launch the server. Depending on the option, when it requires a value but has no value specified we report different messages: 

"$WFLY_CORE/bin/standalone.sh  --graceful-startup=" reports

WFLYSRV0108: No value was provided for argument --graceful-startup=

"$WFLY_CORE/bin/standalone.sh  -u="  reports (-u is to specify multicast address)

WFLYSRV0072: Value expected for option -u=

The task here would be to verify all the available options and make the error message consistent for all of them.