We see the following message in /var/log/messages after install Tomcat 8.0.36
Aug 29 15:45:01 tomcattest systemd: Configuration file /usr/lib/systemd/system/tomcat8@.service is marked executable. Please remove executable permission bits. Proceeding anyway.
The service file permission look like the following:
# ls -l /usr/lib/systemd/system/tomcat8.service -rwxr-xr-x. 1 root root 480 Jun 21 16:35 /usr/lib/systemd/system/tomcat8.service
Side notes Tomcat 8.0.18 did not have a tomcat8.service file and JWS 5 Tomcat 9.0.7 the permission on the service file is:
# ls -l /usr/lib/systemd/system/jws5-tomcat.service -rw-r--r--. 1 root root 525 Nov 29 2018 /usr/lib/systemd/system/jws5-tomcat.service