Click on Servers tab, double click on the server instance to open it up in workspace. Then click Open Launch Configuration. Click on Arguments tab. You need to add the following two arguments:

-Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djava.util.logging.config.file="/Users/firman/Documents/learnjava/apache-tomcat-7.0.40/conf/logging.properties"