Hello all,

Just deployed a CAS 7.3.3 to replace an antiquated 6 due to Duo support 
ending for it, and got it mostly working.  During startup after running 
./gradlew run (only for testing, I plan on pushing it to a Tomcat instance 
in the future) we are seeing a warning in the console:

WARN The use of package scanning to locate Log4j plugins is deprecated. 
Please remove the `packages` attribute from your configuration file.
--- Which configuration file is it referring to? The log4j.xml? I am unsure 
where to begin looking.

More importantly, after leaving CAS running for the weekend I arrived today 
to see error 500 all over whenever trying to access it:
HTTP Status 500 – Internal Server Error
------------------------------

*Type* Exception Report

*Message* Filter execution threw an exception

*Description* The server encountered an unexpected condition that prevented 
it from fulfilling the request.

*Exception*
jakarta.servlet.ServletException: Filter execution threw an exception 
org.apereo.cas.web.support.filters.AddResponseHeadersFilter.doFilter(AddResponseHeadersFilter.java:62)

When I dug into the log files on the server this line kept popping up:
java.lang.classnotfoundexception 
org.apache.logging.log4j.core.impl.throwableproxy

So I think it's related to whatever log4j issue I'm getting warned about.  
I just don't know enough about CAS to find the file that is generating the 
warning.

Any suggestions where I can look?

Thanks!

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