Hi, I want this:     logger.debug("Test logging: ", new IllegalStateException("Wibble")); to give me a full stack trace, and this:     logger.debug(MarkerFactory.getMarker("MINIMAL_EXCEPTION"), "Test logging: ", new IllegalStateException("Wibble")); to just output the class and message. I don't have Janino, and I'm trying to keep it all as small as possible (also not sure I could pay the price of expression evaluation for each message). The closest I've got is this:   <evaluator name="DISPLAY_EX_EVAL" class="ch.qos.logback.classic.boolex.OnMarkerEvaluator">     <marker>MINIMAL_EXCEPTION</marker>   </evaluator>   <appender name="STDOUTPUT" class="ch.qos.logback.core.ConsoleAppender">     <encoder>       <charset>UTF-8</charset>       <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} %line - %msg%ex{full, DISPLAY_EX_EVAL}%n</pattern>     </encoder>   </appender>   <contextListener class="ch.qos.logback.classic.jul.LevelChangePropagator" /> But that doesn't output exception at all when the Marker is present. Is there any way to get what I want without a more complex expression? Thanks. Jim