[gazebo-2] process has died [pid 10474, exit code 255, cmd /opt/ros/kinetic/lib/gazebo_ros/gzserver -e ode /home/username/catkin_ws/src/robot/worlds/empty.world __name:=gazebo __log:=/home/username/.ros/log/b8bd2e24-5aa6-11e9-a119-00e18c91d723/gazebo-2.log].
log file: /home/username/.ros/log/b8bd2e24-5aa6-11e9-a119-00e18c91d723/gazebo-2*.log
退出gazebo:
ctrl+c
执行命令:
killall gzserver
killall gzclient
最后,重新运行launch文件。