[ https://issues.jboss.org/browse/WFLY-1791?page=com.atlassian.jira.plugin.... ] Miguel Moquillon commented on WFLY-1791: ---------------------------------------- levelRange[DEBUG, ERROR] as a STRING (hence double-quoted in your example) seams to cause an error while being interpreted at Wildfly starting: it fails silently to start. In fact, all filter expressions in filter-spec failed in my case (Wildfly 9.0.2): even with expression from which this bug was filled: substituteAll("JBAS" \, "DUMMY") -- This message was sent by Atlassian JIRA (v6.4.11#64026)