Job for tomcat.service failed because the control process exited with error code. See “systemctl sta

根据引用和引用，出现"Job for tomcat.service failed because the control process exited with error code. See 'systemctl status tomcat.service' and 'journalctl -xe' for details."的错误提示表明tomcat服务启动失败。根据引用中的描述，可能是由于缺少JAVA_HOME或JRE_HOME环境变量导致的。需要在tomcat的bin目录下的setclasspath.sh文件中添加JAVA_HOME变量，并重新执行"systemctl start tomcat"命令来解决这个问题。