debug « log4j « Java Enterprise Q&A

1. How to configure log4j to dump debug info when an error occurs?

I have a web application that dumps logging information in a file using log4j RollingFileAppender. The application is currently configured to dump only WARN and higher logging information so that the ...

2. Display only selected Log4j debug statements

Is it possible to display only those statements in console, which are having certain words. For eq:

   logger.debug ( "java: hello " );
   logger.debug ( "groovy: hello " ...

3. How to enable Logger.debug() in Log4j

While trying to execute the following lines only the last two statements are displayed("Here is some ERROR" and "Here is some FATAL") and the first three statements are not displayed.I had ...

4. Log4J: problem with isDebugEnabled() method

I am struggling with Log4J and isDebugEnabled() method. When I execute:

package org.test;

import org.apache.log4j.Level;
import org.apache.log4j.Logger;

public class Test {
public static Logger logger = Logger.getLogger(Test.class.getName());

public static void main(String[] args) { (new Test()).test(); }

public void test() ...

5. How to debug large server side distributed Java application

Here is my problem: I am trying to debug Apache Cassandra and understand the flow of the app. I.e. when a request is sent by the client, say put(), what methods ...

6. Capture to file

I need to save the output that is created to a file. I'm using log4j and I tried creating a logging proxy as in the code example below; however, it ...

7. Avoid server.log debug lines in Jboss

I am using Jboss5.1x I have configured jboss-log4j.xml so I will have a seperate log file for my application on jboss(with the name "ecms.log"). for some reason in addition the logs under DEBUG ...

8. slf4j: debug behavior inconsistent?

I'm using slf4j + log4j with a library of mine. I am using it in a quick application where I don't really care about configuring the logging... or at least I didn't ...

9. One (log.isDebugEnabled()) condition each debug statement occurrence

I would like to check with the community, if this is an accepted practice, to have multiple if conditions for each debug statement occurring in a row:

if (log.isDebugEnabled()) log.debug("rproductType = "+ ...

10. Migrate Log4J log.debug statements to SLF4J's parameterized messages?

I have around 400 of production Java source code files with around hundred to twenty thousand lines of codes each to change out from Log4J String concatenation to SLF4J's parameterized logging.


11. Application is not logging log, how to debug log 4j starting or not

I have created a very simple application, where I am trying to use the Log4J, but my application is not logging any log. Can anyone please tell me how can I debug ...

12. What should the mail.debug=true option of javax.mail do?

In the configuration properties of my javax.mail.Session I have set mail.debug=true, but for some reason, this doesn't add any new output to the application log. I've set the log4f logging level ...

13. Debug statements are not being called in log4j

This is my above file ,

log4j.rootCategory=Info, A1

# A1 is a DailyRollingFileAppender

log4j.appender.A1.layout.ConversionPattern=%-22d{dd/MMM/yyyy HH:mm:ss} - %m%n"The middleware url is"+Request.getSecurityHeader().); logger.debug("Inside the Jai method"); logger.debug("The middleware url is"+URL); Why inside I am getting this line ...

14. log4j debug switch