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From Konstantin Kolinko <knst.koli...@gmail.com>
Subject Re: Understanding how to controlling what data is written to log4j appenders
Date Fri, 11 Mar 2016 00:42:33 GMT
2016-03-11 2:49 GMT+03:00 Joleen Barker <oldenuf2nobtr@gmail.com>:
> I wanted to let you know that I really tried at this and feel the changes I
> made should be working and it is a matter of the developer hard coding the
> log messages to go to the stdout/stderr and became lazy as one of the other
> that commented had stated. I opened a ticket with the vendor but I have no
> idea how long it will take. So I went the route of writing a small perl
> script to copy the catalina.out file to a file with the same name and the
> date and time appended on the file name and then next I open the existing
> catalina.out file to clear the contents and then close it again to start
> the next day with a clean log file. It isn't the way I wanted to go but I
> ran out of time. If the vendor decides to work with me, it would be great
> but I have a feeling they will not go back and change things.
>

On the logging page of the FAQ:
https://wiki.apache.org/tomcat/FAQ/Logging#Q10


By the way,
1) It is possible to run with a debugger and put a breakpoint into
java.io.PrintStream.println(String).  I doubt that the PrintStream
class is used much anywhere except to implement System.out/System.err.
https://wiki.apache.org/tomcat/FAQ/Developing#Debugging

2) It is possible to search the class files for the message text. The
classes store it in UTF-8, and jar files are just zip archives.


> So are you suggesting to remove the ConsoleAppender from the
> log4j.properties that the vendor has in the WEB-INF/classes directory?

Yes.

The same for Tomcat own log configuration,
http://tomcat.apache.org/tomcat-8.0-doc/logging.html#Considerations_for_production_usage

(Just mentioning for completeness. IIRC you have already reconfigured
Tomcat own logging.)


Best regards,
Konstantin Kolinko

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