How to configure Tomcat logs to/from DEBUG mode

Product: Aleph
Product Version: 22, 23
Relevant for Installation Type: Multi-Tenant Direct, Dedicated-Direct, Local

How can Tomcat be configured to use DEBUG verbosity for log analysis?

Tomcat log files can be found in $aleph_dev/ng/aleph/home/system/thirdparty/tomcat/logs directory:

localhost_access_log file contains incoming requests as initiated by web clients
server.log contains application server messages

To enable debug level messages in the server.log file:

1. Go to the following directory $aleph_dev/ng/aleph/home/system/thirdparty/tomcat/lib/

2. In the ./log4j.xml file, within section <appender name="FILE" edit this line:

<param name="Threshold" value="INFO" />

and change it to:

<param name="Threshold" value="DEBUG" />

3. Restart Tomcat using util W-3-7-9