1. run JBoss EAP
JBOSS_HOME/bin > ./sh
2. login JBoss EAP Web Admin Console
3. try Add User
4. input non-alphnumeric name
5. see the created non-alphnumeric name user.
See the attached image files.
As original issue stated, the descriptions of Users and Groups under Access Control tab can be confusing. The proposition is to change the descriptions of these selections and the names of the Add User / Add group dialogs respectively to avoid confusion with actual users managing.
Non-alphanumeric username registration bug in JBoss EAP Web Admin console
When registering a new user using the "JBoss EAP Admin Web Console / Access Control / Users / Add" menu, a non-alphanumeric user name can be entered in the user name without error.
If you enter a non-alphanumeric user name in the user name using add-user.bat or add-user.sh in the command window or shell, the following error response will be printed to reject the wrong user input.
The JBoss EAP Admin Web Console must be modified to prevent non-alphanumeric user names from being registered, such as add-user.sh.