Mixing log4j 1.x and log4j 2

Question

I have a new application that is being written using log4j2, to take advantage of some of its new features. One of the libraries it uses is a bit older and was built with lo

Answer 1

Are you aware that log4j2 includes a bridge for log4j-1.2? You can use it by removing the old log4j-1.2.17.jar, and include these three jars:

• log4j-api-2.x.jar
• log4j-core-2.x.jar
• log4j-1.2-api-2.x.jar

This will result in all calls that your application makes to the log4-1.2 API to be routed to the log4j2 implementation. The FAQ has a diagram that may clarify things. (Don't forget to remove the old log4j-1.2 jar from the classpath!)