I don't know anything on your part of the installation and how it is implemented.
What you have found is a configuration file that is part of the java container midtier and when used should indicate logging is done. A lot of assumptions. But how the logging could work you can pull more now.
Another java logging is SAS-VA http://support.sas.com/resources/papers/proceedings14/SAS167-2014.pdf it gives more on the logging options approach although it is not your situation. As it is part of http://support.sas.com/rnd/emi/APM94/apm94.faq.html
The bimtag is having all needed information. (page 93 99) http://support.sas.com/documentation/cdl/en/bimtag/68217/PDF/default/bimtag.pdf
"Changing the Location of the Log Files
To modify the location of a log file, follow these steps:
1Change directory to SAS-configuration-directory\Lev1\Web\Common\LogConfig and edit the log4j file for the application to modify.
2Locate the file appender and modify the value of the file parameter:"
The problem is the log events are coded parts within the java applications using the log4j interface. As you have you own application it is doubtful those events are coded in your application.
The logging setup usage is a challenging part of SAS normally been avoided and not easily accessible by SAS docs https://support.sas.com/documentation/cdl/en/logug/67485/HTML/default/viewer.htm#titlepage.htm
---->-- ja karman --<-----