log4j:WARN No appenders could be found for logger

[ananthkolli]

hi,

i used logging in my java application. i placed log4j.jar and log4j.xml file paths
given in classpath.

i am getting 2 warning Messages. Those are as follows

log4j:WARN No appenders could be found for logger (samp.Test1).
log4j:WARN Please initialize the log4j system properly.

log4j.xml is attached ...

How can i solve this problem?. Please help me...
Thanx in advance

[t_mohan]

Hi ananth,

The problem is u r not telling the logger class from which file u have to get the configuration for logging. that is the problem over there , now what u have to do is u have to specify the logging class, which appender it has to use for logging purposes . let me give u an example on this

If u r using the log4j properties file, then there is no need of telling the logger class, because the logger will be searching for the log4j.properties file by default. if this file is not present i,e ( u r defining the logging properties in an xml file , then u have to explicitly tell the logger class from which appender it has to take)

Let us assume u have ur SampleLog.cfg.xml is present in your context root directory, then ur logger class should look like this

import java.net.URL;
import org.apache.log4j.Logger;
import org.apache.log4j.xml.DOMConfigurator;

public class SampleLogger {

static{
try{
URL url = SampleLogger.class.getResource("/SampleLog.cfg.xml");
DOMConfigurator.configure(url);
}catch(Exception e)
{
}
}
static Logger l=Logger.getLogger(SampleLogger.class.getName());
public static void debug(String msg) {
l.debug(msg);
}

public static void info(String msg) {
l.info(msg);
}

public static void warn(String msg) {
l.warn(msg);
}

public static void error(String msg) {
l.error(msg);
}

public static void fatal(String msg) {
l.fatal(msg);
}


}

Pls check the highlighted lines in the logger class, now u can understand what happens

while logging any statement you have to log this way

SampleLogger.info("This is my log info statement");
SampleLogger.debug("This is my log debug statement");

if u r loggin works properly, then usually the log will be created in the BIN directory/ root directory of your web/application server

Let me know your questions

Thank You

[ananthkolli]

ThanX Mohan

i got that one.

[t_mohan]

Welcome Ananth,

Pls feel free to ask me if u have any more questions