Skipping XML Document "/opt/ros/indigo/share/gmapping/nodelet_plugins.xml" which had no Root Elem...

控制台输出ERROR：

[ERROR] [1509691216.710669237]: Skipping XML Document "/opt/ros/indigo/share/gmapping/nodelet_plugins.xml" which had no Root Element. This likely means the XML is malformed or missing

解决办法，卸载ROS重装

首先卸载ROS

sudo apt-get purge ros-*

然后进行重新安装