if i modified my_log4j.xml while running the application. the MDC list values are cleared..how to reset it without restarting my application

Do you have any idea for this

Thanks in advance

In Our Application , Each JPD class is using CommonLogger Class to return the static instance of the Logger object such as private static CommonLogger logger = CommonLogger.getInstance(ClassX.class);

Our Application is used by Multiple testers.
All the Application Logs go to common Log file APP.log
So each tester have to scroll down through the file to find his/her each piece of log.

Our goal is to generate dynamic log for each and every tester so as to save time.

For Weblogic 9.2 Server We have file called “config.xml” , This File gets updated when anything is changed or updated from the Weblogic Console.

In this config.xml File , We have a Server setting like below :
-Dlog4j.configuration=file:/path/apacheLog4jCfg.xml

This Setting is referring to File called apacheLog4jCfg.xml Which means that Weblogic Server is using apache Log4j to do the logging.

In apacheLog4jCfg.xml File , We have the setting like below :
I am using KeyFileAppender to achieve this where In ApacheLog4jcfg.xml , I have the setting like below :

<!—->
<!—->

In this Setting where appender name is APPLOGFILE class is mypackage.KeyFileAppender
param name is File and value is APP.log , this will log all the application logs to the File APP.log
i.e All the testers will hit the application and all the logs will get stored in the File “APP.log”

To generate the dynamic logs we define the following setting in Apachelog4jcfg.xml
We have ContextKey defined in the ApacheLog4jcfg.xml setting whose value is requestID.
This requestID we are using as key in MDC as MDC.put(“requestID”, RuntimeStringValue);
this RuntimeStringValue will get Appended to the APP.log file.
Suppose the Runtime value is X123
So log file should get generated like APP.X123.log

We are using MDC.put(“requestID”, RuntimeStringValue); in CommonLogger Class in the getInstance Method as below :

public static CommonLogger getInstance(Object className) {
CommonLogger CommonLogger = new CommonLogger();

if (className instanceof String) {
CommonLogger.logger = Logger.getLogger((String) className);
} else {
CommonLogger.logger = Logger.getLogger((Class) className);
}

if(RuntimeStringValue != null){
MDC.put(“requestID”,RuntimeStringValue);

}
return CommonLogger;
}

But the problem, which we are facing is that we are able to generate the Log File for first User request.
In the Second User request the logs are going to previously created log file only.

I feel it is due to static keyword present in CommonLogger getInstance(Object className) Method.

The another issue is if we remove static keyword from this method , then all the classes in the application will get affected as they are using the java syntax like private static CommonLogger logger = CommonLogger.getInstance(SomeClassX.class);

I have a questions below :
Q1 : So Using log4j , Is it possible that for each Tester testing the application , a separate log file should be created, So that he/she can see their own set of logs ?

Q2 : Can we use MDC.put for entire application or we have to provide MDC.put for each and every java class file in the application ?