When a server process receives a SIGTERM it simply logs the following, regardless of the log configuration:

INFO  (Thread-0) [org.infinispan.SERVER] ISPN080002: Infinispan Server stopping
INFO  (Thread-0) [org.infinispan.SERVER] ISPN080002: Infinispan Server stopped

This is because Log4j registers a shutdownHook with the runtime in order to cleanup log resources. In order to aid server debugging, we should disable this shutdownHook and manually shutdown the Log4j LogManager.