Tomcat Debug Logging

If ever encountered the problem, that you webapp was not coming up and all you see is

SEVERE: Error listenerStart

in the catalina.out. To shed some light on what is going on you can turn the logging on by dropping a logging.properties file into the WEB-INF/classes dir of your webapp and put these two lines inside:

org.apache.catalina.core.ContainerBase.[Catalina].level = INFO
org.apache.catalina.core.ContainerBase.[Catalina].handlers = java.util.logging.ConsoleHandler