Hello, all. I've been trying to use a ContextSelector to achieve the behavior of JNDIContextSelector, but replacing JNDI lookups with MDC.get(). It did work and now I can have a new LoggerContext based on MDC. That way, I can have new configuration options based on MDC variables. I changed the StaticLoggerBinder implementation to use this new ContextSelector and the first context is correctly get and used. The problem that is stopping my progress is that I can't get to use more than one context. The StaticLoggerBinder.getLoggerFactory() is called once, and only once: in startup. After that, I can't change the ILoggerFactory that's inside the LoggerFactory, because it's static and only set in static { }. That way, when I need to switch contexts, even if I change the current context inside the ContextSelector, it won't be used by the LoggerFactory. I even reproduced the calls from ContextSelectorFilter so that I set/unset the current context, but no use. I thought about using a wrapper ILoggerFactory, but it feels wrong, because the JNDIContextSelector doesn't use anything else and is supposed to work. What am I doing wrong? How do I use ContextSelectors outside what's mentioned in logback manual? Leonardo de Moura Rocha Lima 55 11 3094.3939