Hello everybody,

i like to ask, if there is reason why 

logback/LoggingEvent.java at master · qos-ch/logback 


is evaluated during call,  and not "materialised" during log event creation

I seen situations when before LoggingEvent was processed, MDC context was reset, 
and after that MDC data was not present in related log message

thank you very much for answer

Best regards

Peter Kotula