解决ROS中运行gazebo出现process has died的情况

项目场景：

[gazebo-1] process has died [pid 397, exit code 255, cmd /opt/ros/melodic/lib/gazebo_ros/gzserver -e ode worlds/empty.world __name:=gazebo __log:=/home/jiqiang/.ros/log/366747d8-0841-11ed-adde-1c1bb54aa7d6/gazebo-1.log].
log file: /home/zgjldx/.ros/log/366747d8-0841-11ed-adde-1c1bb54aa7d6/gazebo-1*.log

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问题描述

运行roslaunch gazebo_ros empty_world.launch指令，出现process has died的报错[gazebo-1] process has died [pid 397, exit code 255, cmd /opt/ros/melodic/lib/gazebo_ros/gzserver -e ode worlds/empty.world __name:=gazebo __log:=/home/jiqiang/.ros/log/366747d8-0841-11ed-adde-1c1bb54aa7d6/gazebo-1.log].
log file: /home/zgjldx/.ros/log/366747d8-0841-11ed-adde-1c1bb54aa7d6/gazebo-1*.log

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解决方案：

killall gzserver

killall gzclient

在终端执行上述两条指令（一般只需要执行第一条指令）

重新执行以下指令，成功打开gazebo，不再出现报错

roslaunch gazebo_ros empty_world.launch