Erro ao reiniciar o Tomcat7 no Xubuntu

root@sped-servidor:~# service tomcat7 start
Job for tomcat7.service failed because the control process exited with error code. See "systemctl status tomcat7.service" and "journalctl -xe" for details.
root@sped-servidor:~#



Alguém já pegou este tipo de problema?

Já tentei excluir e reinstalar o tomcat7 e não deu certo.

Através do comando: tomcat7# /etc/init.d/tomcat7 status

Aparece isto:

root@sped-servidor:/etc/tomcat7# /etc/init.d/tomcat7 status
● tomcat7.service - LSB: Start Tomcat.
Loaded: loaded (/etc/init.d/tomcat7; bad; vendor preset: enabled)
Active: failed (Result: exit-code) since Dom 2018-12-16 21:49:42 -02; 1min 10s ago
Docs: man:systemd-sysv-generator(8)
Process: 4254 ExecStart=/etc/init.d/tomcat7 start (code=exited, status=1/FAILURE)

Dez 16 21:49:42 sped-servidor systemd[1]: Starting LSB: Start Tomcat....
Dez 16 21:49:42 sped-servidor tomcat7[4254]: * no JDK or JRE found - please...E
Dez 16 21:49:42 sped-servidor systemd[1]: tomcat7.service: Control process e...1
Dez 16 21:49:42 sped-servidor systemd[1]: Failed to start LSB: Start Tomcat..
Dez 16 21:49:42 sped-servidor systemd[1]: tomcat7.service: Unit entered fail....
Dez 16 21:49:42 sped-servidor systemd[1]: tomcat7.service: Failed with resul....
Hint: Some lines were ellipsized, use -l to show in full.