Can not add property after change of class in custom log formatter. ------------------------------------------------------------------- Key: WFCORE-1273 URL: https://issues.jboss.org/browse/WFCORE-1273 Project: WildFly Core Issue Type: Bug Components: Logging Environment: Running unsecured EAP 7.0. DR9 version in standalone mode with standalone-full-ha profile Reporter: James Perkins Assignee: James Perkins When you create custom formater - XMLFormatter {{/subsystem=logging/custom-formatter=XMLFormatter:add(class=java.util.logging.XMLFormatter, module=org.jboss.logmanager)}} and then in web console edit class of formatter to *org.jboss.logmanager.formatters.PatternFormatter* then save and try to add properties - *pattern=%s%E%n*. Property is not saved. When you create new formatter with *org.jboss.logmanager.formatters.PatternFormatter* class and then try to add same property, saving is successful.