tomcat 9 with ubuntu 18.04. tomcat service status:
● tomcat.service - Tomcat 9 servlet container Loaded: loaded (/etc/systemd/system/tomcat.service; enabled; vendor preset: enabled) Active: failed (Result: signal) since Thu 2020-03-26 03:00:31 UTC; 3h 33min ago Process: 8815 ExecStop=/opt/tomcat/latest/bin/shutdown.sh (code=exited, status=0/SUCCESS) Process: 8858 ExecStart=/opt/tomcat/latest/bin/startup.sh (code=exited, status=0/SUCCESS) Main PID: 8865 (code=killed, signal=KILL)
catalina.out says nothing. syslog says
Mar 26 03:00:31 user systemd: tomcat.service: Main process exited, code=killed, status=9/KILL Mar 26 03:00:31 user systemd: tomcat.service: Failed with result 'signal'. Mar 26 03:17:08 user systemd: Reloading The Apache HTTP Server. Mar 26 03:17:08 user systemd: Reloaded The Apache HTTP Server.
The service was dead but manually restarting the service succeeded.
What can I check in order to know what killed tomcat?
What can I do to restart tomcat in case something like that happens in the future?