my $conf = q(
    log4perl.category.ess2_loader=DEBUG, LOGFILE
    log4perl.category.Tools=INFO, LOGFILE

    log4perl.appender.LOGFILE=Log::Log4perl::Appender::File
    log4perl.appender.LOGFILE.filename=/var/log/error.log
    log4perl.appender.LOGFILE.mode=append
 
    log4perl.appender.LOGFILE.layout=PatternLayout
    log4perl.appender.LOGFILE.layout.ConversionPattern=%d %P [%r] %F %L %c - %m%n
);
Log::Log4perl::init( \$conf );