Change Mule Application Logging Level

Introduction

MuleSoft has changed many stuff for the last year. One of the questions developer will ask is how to change the logging level. One might think that he can just create log4j.properties file and set the logging there. Unfortunately, this will not work. We have to create a file name log4j2.xml.

Solution

Put the following file (named as: log4j2.xml) into src/main/resources:

Mule's Anypoint Studio comes with slf4j librarary. You can create your logger like this:

   private static Logger logger = LoggerFactory.getLogger(TransformListOfObjects.class);

After you put the file of log4j2.xml in place as stated above, you can run your application from the Anypoint Studio, you will see debug messages. These message can be very valuable, in particular, to check the parameters set for various connectors.