I had the following code at the beginning of every method of an object: log4cxx::NDC ndc( m_loggingContext ); LOG4CXX_TRACE(logger, "Doing whatever!") ;
m_loggingContext was set in an init method to be like "Chan 4 / Dev 3". This worked OK but eventually, if one method called another, I'd get NDC's in the log (pattern = "<%t>") that were concatenated duplicates, e.g., ... <Chan 4 / Dev 3 Chan 4 / Dev 3> ... Doing whatever! Not good. So, I changed the code to this: if( log4cxx::NDC::empty() ) log4cxx::NDC ndc( m_loggingContext ); LOG4CXX_TRACE(logger, " Doing whatever!") ; Now, the logs all show <null> for ALL NDC's, everywhere. What is the correct way to avoid duplicate NDC's but also get some output? Thanks, Chris
