Java – Tomcat 9 on Debian is not running


I have Tomcat 9 installed on my Raspberry Pi 3 B + with the OS Raspbian. When I start startup.sh, I get this output and then abort:

Using CATALINA_BASE: / opt / tomcat9
Using CATALINA_HOME: / opt / tomcat9
Using CATALINA_TMPDIR: / opt / tomcat9 / temp
Using JRE_HOME: / usr
Using CLASSPATH: /opt/tomcat9/bin/bootstrap.jar:/opt/tomcat9/bin/tomcat-juli.jar
Tomcat started.

And then it ends without anything else. Does somebody know?