Other solution, what seems to be more transcient: make Logback configuration reloadable, see: http://logback.qos.ch/manual/configuration.html#autoScan
With  a relativelly short period (30 s?) 
Nonetheless, I'm wondering what will be the impact on performance (more so that we add a global perf impact for a rare event. It may be better to add a trigger somewhere to reload config programmatically, on demand only, if possible).