Display thread id instead thread name in log

Question

I have a Struts application with log4j to display information about application.

The pattern to format log\'s output is as follows:

log4j.appender.RA         


        

Answer 1

You can use the ThreadContext Map to supply meta-data to log4j2. This is a String Map of values that you CAN add through normal formatting.

String threadId = String.valueOf(Thread.currentThread().getId());
ThreadContext.put("TId", threadId);

And a much more reasonable Pattern:

Full Log4j2 documentation on "Fish Tagging"