No, Foglight 6.1.0 and higher releases are no longer using Log4j 1.x.
For the 6.1.0 release, the Log4j 1.x implementation was removed and the libraries upgraded to 2.17.1 across all Foglight core and cartridges.
The Log4j files in $FMS_HOME/lib and $FMS_HOME/server/core directories are all Log4j 2.x versions.
The file named log4j-1.2-api.jar is a Log4j 2.x library and required to support code that is still using the Log4j 1.x API (Apache Log4j 2).
Versions for the server can be viewed on the Legal Notices tab of the About screen.
