I want to filter my log per the expression marker != null && (marker.contains("SYSTEM_OUT") || level==ERROR).

But recently I upgraded the logback to the latest version and found it doesn't work.

I checked the document and it says it still supports marker, see https://logback.qos.ch/manual/appenders.html#marker_JaninoEventEvaluator.

But from the source code I see it has already comment out https://github.com/qos-ch/logback/blob/master/logback-classic/src/main/java/ch/qos/logback/classic/boolex/JaninoEventEvaluator.java#L50.
I also tried to workaround this by adding two appenders and one for log level filter and another for OnMarkerEvaluator, but the performance decreased significantly and it would be obvious if I have a large set of data that need to be logged.

Any thoughts on this?