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Posted to users@tomcat.apache.org by Bart Vandewoestyne <Ba...@telenet.be> on 2009/12/04 16:02:51 UTC
Logging with Log4J
Hello list,
Up until now, I have used simple System.out.println() statements
to do the logging of my web applications, but I want to start
using a more advanced system with more possibilities. Log4J
seemed like a good choice. The most important thing for me is that the
log messages are written nicely into a separate file.
Based on stuff I found using Google, I have created a
log4j.properties file (see bottom of this mail) which is saved under
the WEB-INF/classed directory.
It seems like things are working *partly*... because although I
do specify the file testbart.log, there is no testbart.log file
on the tomcat server (i checked this with find / -name
testbart.log as root). I *do* however see log messages appearing
in /var/log/syslog, but that is not what i want. I want them to be written
into a separate logfile.
Can somebody point me in the right direction here? All i want is
that the logs for my webapp (written using Log4J) are written in to a
file
/var/log/tomcat/mywebapp.log
It is however unclear to me where i have to configure this... is
it a Debian config thing? Is it a Tomcat config thing? Is it a
log4J config thing? Do I config this in the log4j.properties
file?
Just for the record: we're using Tomcat 5.5 on a Debian GNU/Linux
stable system.
Kind regards,
Bart
----------------------- log4j.properties ------------------------------
log4j.rootLogger=DEBUG, cons
log4j.logger.com.jspservletcookbook=, myAppender
# The root logger's appender
log4j.appender.cons=org.apache.log4j.ConsoleAppender
# The com.jspservletcookbook logger's appender
log4j.appender.myAppender=org.apache.log4j.RollingFileAppender
log4j.appender.myAppender.File=testbart.log
log4j.appender.myAppender.MaxBackupIndex=1
log4j.appender.myAppender.MaxFileSize=1MB
# The root logger's layout
log4j.appender.cons.layout=org.apache.log4j.SimpleLayout
# The com.jspservletcookbook logger's layout
log4j.appender.myAppender.layout=org.apache.log4j.PatternLayout
log4j.appender.myAppender.layout.ConversionPattern=%-5p Logger:%c{1} Date: %d{ISO8601} - %m%n
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Re: Logging with Log4J
Posted by Christopher Schultz <ch...@christopherschultz.net>.
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Hash: SHA1
Bart,
On 12/5/2009 7:55 AM, Bart Vandewoestyne wrote:
>>> log4j.appender.myAppender.File=testbart.log
>>
>> I would have done:
>> log4j.appender.myAppender.File=/var/log/tomcat/mywebapp.log
>>
>> Make sure that the user running Tomcat has rights to write to that
>> file/directory.
>
> OK. I also figured out that it works if i specify the absolute
> path /var/log/tomcat/mywebapp.log
>
> I thought that if i only specify the filename, by default it
> would arrive in /var/log/tomcat/ but apparently this is not the
> case.
Why would you think that the file would magically appear in
/var/log/tomcat? There is no default log file location for log4j, nor
for any logging mechanism that I know of. The best you could hope for is
the current working directory of the process, which could be anything.
It's always best to fully-specify path names.
> Anyway, my problem seems solved. All i have to do now is continue
> reading the Log4J docs to better understand and configure my
> logging :-)
Enjoy!
- -chris
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Re: Logging with Log4J
Posted by Bart Vandewoestyne <Ba...@telenet.be>.
On Fri, Dec 04, 2009 at 05:08:05PM -0500, Christopher Schultz wrote:
>
> [snip]
>
> > log4j.rootLogger=DEBUG, cons
>
> See Jeffrey's suggestion in his post.
OK. I changed that... and I'm working my way through the Log4J
docs to better understand how it works...
> > log4j.appender.myAppender.File=testbart.log
>
> I would have done:
> log4j.appender.myAppender.File=/var/log/tomcat/mywebapp.log
>
> Make sure that the user running Tomcat has rights to write to that
> file/directory.
OK. I also figured out that it works if i specify the absolute
path /var/log/tomcat/mywebapp.log
I thought that if i only specify the filename, by default it
would arrive in /var/log/tomcat/ but apparently this is not the
case.
Anyway, my problem seems solved. All i have to do now is continue
reading the Log4J docs to better understand and configure my
logging :-)
Thanks!
Bart
--
"Share what you know. Learn what you don't."
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Re: Logging with Log4J
Posted by Christopher Schultz <ch...@christopherschultz.net>.
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Bart,
On 12/4/2009 10:02 AM, Bart Vandewoestyne wrote:
> I *do* however see log messages appearing in /var/log/syslog, but
> that is not what i want.
That's very weird: you have no configuration whatsoever that would lead
me to believe that your webapp's messages are going to syslog. Are you
sure you don't have something else logging to syslog?
> /var/log/tomcat/mywebapp.log
[snip]
> log4j.rootLogger=DEBUG, cons
See Jeffrey's suggestion in his post.
> log4j.appender.myAppender.File=testbart.log
I would have done:
log4j.appender.myAppender.File=/var/log/tomcat/mywebapp.log
Make sure that the user running Tomcat has rights to write to that
file/directory.
- -chris
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RE: Logging with Log4J
Posted by Jeffrey Janner <Je...@PolyDyne.com>.
Change your first line from "DEBUG, cons" to "DEBUG, myAppender"
-----Original Message-----
From: Bart Vandewoestyne [mailto:Bart.Vandewoestyne@telenet.be]
Sent: Friday, December 04, 2009 9:03 AM
To: users@tomcat.apache.org
Subject: Logging with Log4J
Hello list,
Up until now, I have used simple System.out.println() statements
to do the logging of my web applications, but I want to start
using a more advanced system with more possibilities. Log4J
seemed like a good choice. The most important thing for me is that the
log messages are written nicely into a separate file.
Based on stuff I found using Google, I have created a
log4j.properties file (see bottom of this mail) which is saved under
the WEB-INF/classed directory.
It seems like things are working *partly*... because although I
do specify the file testbart.log, there is no testbart.log file
on the tomcat server (i checked this with find / -name
testbart.log as root). I *do* however see log messages appearing
in /var/log/syslog, but that is not what i want. I want them to be
written
into a separate logfile.
Can somebody point me in the right direction here? All i want is
that the logs for my webapp (written using Log4J) are written in to a
file
/var/log/tomcat/mywebapp.log
It is however unclear to me where i have to configure this... is
it a Debian config thing? Is it a Tomcat config thing? Is it a
log4J config thing? Do I config this in the log4j.properties
file?
Just for the record: we're using Tomcat 5.5 on a Debian GNU/Linux
stable system.
Kind regards,
Bart
----------------------- log4j.properties ------------------------------
log4j.rootLogger=DEBUG, cons
log4j.logger.com.jspservletcookbook=, myAppender
# The root logger's appender
log4j.appender.cons=org.apache.log4j.ConsoleAppender
# The com.jspservletcookbook logger's appender
log4j.appender.myAppender=org.apache.log4j.RollingFileAppender
log4j.appender.myAppender.File=testbart.log
log4j.appender.myAppender.MaxBackupIndex=1
log4j.appender.myAppender.MaxFileSize=1MB
# The root logger's layout
log4j.appender.cons.layout=org.apache.log4j.SimpleLayout
# The com.jspservletcookbook logger's layout
log4j.appender.myAppender.layout=org.apache.log4j.PatternLayout
log4j.appender.myAppender.layout.ConversionPattern=%-5p Logger:%c{1}
Date: %d{ISO8601} - %m%n
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