[gazebo-1] process has died [pid 22855, exit code 255,

[gazebo-1] process has died [pid 22855, exit code 255, cmd /opt/ros/kinetic/lib/gazebo_ros/gzserver -e ode /opt/ros/kinetic/share/husky_gazebo/worlds/room2/room2.world __name:=gazebo __log:=/home/gary/.ros/log/3af96d16-4ecd-11e9-bfbd-309c236651e4/gazebo-1.log].
log file: /home/gary/.ros/log/3af96d16-4ecd-11e9-bfbd-309c236651e4/gazebo-1*.log

执行如下

killall gzserver

kilall gzclient