grails - my log4j configuration doesn't produce any output - grails

Question

I'm trying to use log4j in my webapp, I wrote a log4j configuration based on the exemple in this blog.
Files are created but there is no ouput. I tried different configurations without success
Config.groovy
def log4jFileName = System.properties.getProperty('catalina.base', '.') + "/logs/myapp.log"
def log4jStacktrace = System.properties.getProperty('catalina.base', '.') + "/logs/stacktrace.log"
environments {
development {
log4jFileName = "logs/myapp.log"
}
test {
log4jFileName = "logs/myapp.log"
}
}
log4j = {
def pattern = new PatternLayout("[%p] [%c{3}] %m%n")
appenders {
appender new DailyRollingFileAppender(
name:"file",
file:log4jFileName,
layout: pattern,
datePattern: "'.'yyyy-MM-dd",
threshold: Level.toLevel("DEBUG")
)
rollingFile name:"stacktrace",
file:log4jStacktrace,
maxFileSize:'5MB',
layout: pattern,
datePattern: "'.'yyyy-MM-dd"
console name:"stdout",
layout: pattern,
datePattern: "'.'yyyy-MM-dd"
}
root {
environments {
production {
debug "file", "stacktrace"
}
development {
debug "file", "stdout"
}
}
}
error 'org.codehaus.groovy.grails.web.servlet', // controllers
'org.codehaus.groovy.grails.web.pages', // GSP
'org.codehaus.groovy.grails.web.sitemesh', // layouts
'org.codehaus.groovy.grails.web.mapping.filter', // URL mapping
'org.codehaus.groovy.grails.web.mapping', // URL mapping
'org.codehaus.groovy.grails.commons', // core / classloading
'org.codehaus.groovy.grails.plugins', // plugins
'org.codehaus.groovy.grails.orm.hibernate', // hibernate integration
'org.springframework',
'org.hibernate',
'net.sf.ehcache.hibernate'
warn 'org.springframework',
'org.hibernate',
'grails.plugins.springsecurity',
'groovyx.net.http'
debug 'grails.app'
}
Controller
log.info("info")
log.error("error")
log.debug("debug")
log.warn("warn")