1log4j.rootLogger=WARN, stderr 2 3log4j.appender.stderr=org.apache.log4j.ConsoleAppender 4log4j.appender.stderr.Target=System.err 5log4j.appender.stderr.layout=org.apache.log4j.PatternLayout 6log4j.appender.stderr.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n