It’s impossible to set a custom pattern string for the handler’s formatter via CLI or native configuration API. The default value for the pattern is always used - not the specified one. The stored configuration in domain.xml is ok but runtime setting of the pattern doesn’t work. I need to restart JBoss to apply the changes.

The configuration in domain.xml file works fine during startup:

<formatter>
<pattern-formatter pattern="custom pattern string"/>
</formatter>