log4j:WARN Please initialize the log4j system properly

[sumanta panda]

Hi All,
I am trying to implement logger concept in my java application.

For testing purpose I am creating a Test.java file .I have added the log4j-1.2.9.jar.
I am not getting any compilation error. While executing the Test.java I am getting
Exception
log4j:WARN No appenders could be found for logger (Log4jTest.Test).
log4j:WARN Please initialize the log4j system properly.

Please suggest me how to fix this error.

Code
Test.java

package Log4jTest;

import org.apache.log4j.*;

public class Test {
	private static Logger log = Logger.getLogger(Test.class);
	public static void main(String[] args) {
		log.error("Calling the Main");
	
		}

	}

log4j.properties

#### Use two appenders, one to log to console, another to log to a file
log4j.rootCategory=info, stdout, R

#### First appender writes to console
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout

# Pattern to output the caller's file name and line number.
log4j.appender.stdout.layout.ConversionPattern=%5p [%t] (%F%L) - %m%n

#### Second appender writes to a file
log4j.appender.R=org.apache.log4j.RollingFileAppender
log4j.appender.R.File=D:\\log\\import.log

# Control the maximum log file size
log4j.appender.R.MaxFileSize=10000KB
# Archive log files (one backup file here)
log4j.appender.R.MaxBackupIndex=10

log4j.appender.R.layout=org.apache.log4j.PatternLayout
log4j.appender.R.layout.ConversionPattern=%p %t %c - %m%n

Thanks for your time.

Regards,
Sumanta Panda

[Nathan Pruett]

Is log4j.properties in the classpath when the program executes?

[sumanta panda]

Dear Nathan,
Its log4j.properties not in the classpath when the program executes.

Requesting you to please provide the solution how to fix it.

Thanks for your time.

Regards,
Sumanta Panda

[yuvaraaj mohan]

hi,

Which application server are you using?

Cheers,
Yuvaraj.

[Bear Bibeault]

If Tomcat 6, drop it in Tomcat's lib folder and it will apply for all web apps.

[Balu Sadhasivam]

sumanta ,

Before calling methods of log4j , the log4j configuration should be done. Either configured directly in code or through log4j.properties or xml file.

	static Logger myLogger = Logger.getLogger(log4jTest.class.getName());
	static Appender myAppender;
		myLogger.setLevel(Level.ALL);
		
		// Define Appender   
		myAppender = new ConsoleAppender(new SimpleLayout());

		//myAppender.setLayout(new SimpleLayout());
		myLogger.addAppender(myAppender);

If you use log4j.properties , it should be in the classpath for the configuration to be used , make sure its copied to classes folder in-case of web application.

[sumanta panda]

Hi All,
I am using the logger concept in a Standalone java program with RAD tool.

My Folder Structure is::
D:\workspace_Log4j\Log4jTest
D:\workspace_Log4j\Log4jTest\src
D:\workspace_Log4j\Log4jTest\bin
D:\workspace_Log4j\Log4jTest\lib\ log4j-1.2.9.jar
D:\workspace_Log4j\Log4jTest\ log4j.properties

Please suggest me if my folder structure is wrong.

My doubt is how Test.java is knowing we are using log4j.properties file?Do we need to initialize the log4j.properties in my Test.java file?

How can i use log4j.properties in the classpath configuration ?

Thanks for your time.
Please suggest how i fix this error.

[sumanta panda]

Hi All,
This issue has been resolved after copied the log4j.properties in the src location D:\workspace_Log4j\Log4jTest\src\ log4j.properties .

Thanks to all.


Best Regards,
Sumanta Panda
Tcs

[Chandra Mouli Kakara]

Hi,

Please find the below steps to solve the issue

Issue :
log4j:WARN No appenders could be found for logger (com.app.MyLogger).
log4j:WARN Please initialize the log4j system properly.

Solution :
1)download log4j-1.2rc1-2002-04-16.jar file
2)Add the log4j-1.2rc1-2002-04-16.jar file to build path
3)create object private static org.apache.log4j.Logger log= Logger.getLogger(MyLogger.class);
4)once you run the Mylogger.java file system will automatically creates the log4j.properties file
5)find out the log4j.propertiesfile and replace the contents as per the requirements(mostly system will creates in bin directory)
6)if not find log4j.properties file create one new file in bin directory (/workspace/projectdirectory/bin/)
6)log4j.properties
log4j.rootLogger=debug, stdout
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.out
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%t %-5p %c{2} - %m%n

[Paul Sturrock]

Any reason you are suggesting downloading an old release candidate version of log4j, rather than an official build?