...
Make sure that if you are using log4j wizard you will need to setup the log sources and manually apply the Tomcat/Catalina tags on them for the App to work correctly.
References
Tomcat 7
https://tomcat.apache.org/tomcat-7.0-doc/logging.html
Access Logs: https://tomcat.apache.org/tomcat-7.0-doc/config/valve.html#Access_Logging
Tomcat 8
Logging: https://tomcat.apache.org/tomcat-8.0-doc/logging.html
Access Logs: https://tomcat.apache.org/tomcat-8.0-doc/config/valve.html#Access_Logging
Tomcat 9
https://tomcat.apache.org/tomcat-9.0-doc/logging.html
Access Logs: https://tomcat.apache.org/tomcat-9.0-doc/config/valve.html#Access_Logging
Log4J
If the Server is using the log4j library for logging please follow the steps documented in adding logs from log4j 1.2 or log4j 2.*
...