Log4J created two log files but should have only done one

[Mike Bates]

This properties file for some reason creates two log files when I expect one. What am I missing?

It creates: C:\jAPRSSend\jAPRSSend.log and C:\jAPRSSend\jAPRSSendjAPRSSend.log. The second log is empty the first one gets everything. I do not want the second one. Still new to Log4J, so I am wondering what is going on. Obviously, this is on Windows and I am going to test on Linux.

log4j.rootLogger=DEBUG,jAPRSSend

log4j.appender.jAPRSSend=org.apache.log4j.RollingFileAppender
log4j.appender.jAPRSSend.file=${user.dir}/jAPRSSend.log
log4j.appender.jAPRSSend.MaxFileSize=1MB
log4j.appender.jAPRSSend.MaxBackupIndex=2
log4j.appender.jAPRSSend.layout=org.apache.log4j.PatternLayout
log4j.appender.jAPRSSend.layout.ConversionPattern=%5p | %d | %F:%L | %m%n
log4j.appender.jAPRSSend.Threshold=DEBUG

Thanks for looking at this for me.

Mike

[Martijn Verburg]

That has got me stumped, can you try on Linux and post the results here?

[Mike Bates]

Tried it on Linux and get a file called C:jAPRSSendjAPRSSend.log only though no log information shows in it.

For each class, I have

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

and

private static Logger logger = Logger.getLogger(classname.class);

and for the primary class

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

public class jAPRSSend implements ActionListener {

private static Logger logger = Logger.getLogger(jAPRSSend.class);
.
.
	public static void main(String[] args) {
		PropertyConfigurator.configure("log4j.properties");

Mike

[Tom Reilly]

log4j.appender.jAPRSSend.file=${user.dir}/jAPRSSend.log

On linux, what is your ${user.dir} set to? Linux has a different file system structure than Windows. Linux doesn't have a C drive.

[Mike Bates]

Okay, ${user.dir} is /home/mbates/dist on Linux and found a file called dist/jAPRSSend.log in the /home/mbates directory. The file C:jAPRSSendjAPRSSend.log created with it in the /home/mbates/dist directory.

log4j.appender.jAPRSSend.file=${user.dir}/jAPRSSend.log  

to

log4j.appender.jAPRSSend.file=${user.dir}\jAPRSSend.log  

With the above change, after deleting all log files, I still get two log files now in /home/mbates/dist. One called jAPRSSend.log and one called C:jAPRSSendjAPRSSend.log.

I am using log4j-1.2.15.jar in my lib directory. [UPDATED] Just tried 1.2.16 with the same results.

Mike

[Martijn Verburg]

You don't have any other log4j.properties files or log4j.xml files floating around?

[Mike Bates]

Martijn,

You hit the nail no the head. It looks like I had a log4j.properties within the Jar file and it was using that first. Thought I had deleted it a long time ago.

Something that caused me some low level frustration for the last couple of weeks and it was simple.

Thanks
Mike

[Jaikiran Pai]

For issues like these, I usually set the following Java system property:

-Dlog4j.debug=true

That prints out useful information on how log4j is trying to configure itself.

[Martijn Verburg]

You're welcome and it most definitely happens to all of us!