Please initialize the log4j system properly warning

Question

Here is the error message -

log4j:WARN No appenders could be found for logger (SerialPortUtil). log4j:WARN Please initialize the log4j system properly. log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info. 

Here is the invocation in the SerialPortUtil class -

private static final Logger log = Logger.getLogger(SerialPortUtil.class.getSimpleName()); . . . log.info("Serial port " + port.getName() + " is available"); 

Here is the content of my log4j.properties file -

log4j.rootLogger=DebugAppender  #Debug logging log4j.appender.DebugAppender=org.apache.log4j.RollingFileAppender log4j.appender.DebugAppender.Threshold=DEBUG log4j.appender.DebugAppender.File=activityLog.log log4j.appender.DebugAppender.MaxFileSize=200KB log4j.appender.DebugAppender.MaxBackupIndex=5 log4j.appender.DebugAppender.layout=org.apache.log4j.PatternLayout log4j.appender.DebugAppender.layout.ConversionPattern=%d{DATE} %t - %m%n 

And the property file is on the classpath.

Everything looks right to me, so what's going on? Shouldn't the DEBUG threshold also capture INFO logging?

Answer 1

Add the code

BasicConfigurator.configure(); 

in your static main class as below..

Note: add " \hadoop-2.7.1\share\hadoop\common\lib\commons-logging-1.1.3.jar & \hadoop-2.7.1\share\hadoop\common\lib\log4j-1.2.17.jar " as the external references

import org.apache.log4j.BasicConfigurator;  public class ViewCountDriver extends Configured implements Tool{      public static void main(String[]args) throws Exception{          BasicConfigurator.configure();           int exitcode = ToolRunner.run(new ViewCountDriver(), args);         System.exit(exitcode);      } }