If you shutdown the server, you get an error:
Even though its considered by this comment clean - https://issues.jboss.org/browse/AS7-689?focusedCommentId=12614756&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-12614756 - I is not really clean as you get an error but termination of the channel can be anticipated. Users might be confused now knowing if its an actual error or not. For example take a look at SSH.
The same basic issue exists for the :reload operation.