Hi Joern, FYI, I changed the constructor of ContextAwareBase to take a ContextAware object instead of Object previously. I think this change makes errors less likely. For one, I passed a Context instead of ContextAware by mistake on several occasions. Here is the commit: https://github.com/qos-ch/logback/commit/71886409e62533af Let me know if it breaks anything on your side. Cheers, -- Ceki 65% of statistics are made up on the spot