logging - What is the difference between Log4j's NDC and MDC facilities? - Stack Overflow

logging - What is the difference between Log4j's NDC and MDC facilities? - Stack Overflow

MDC allows you to add custom tags for log4j. eg:

%X{mytag} in log4j.xml  

is referenced by

MDC.put("mytag","StackOverflow");  

MDC child thread automatically inherits a copy of the mapped diagnostic context of its parent.

NDC operations such as push, pop, clear, getDepth and setMaxDepth affect the NDC of the current thread only.

Read full article from logging - What is the difference between Log4j's NDC and MDC facilities? - Stack Overflow