解决：Action client not connected: arm/gripper_controller/follow_joint_trajectory
[ERROR] [1627267012.953273779, 3804.152000000]: Unable to identify any set of controllers that can actuate the specified joints: [ right_j0 right_j1 right_j2 right_j3 right_j4 right_j5 right_j6 ]
[ERROR] [1627267012.955757472, 3804.153000000]: Known controllers and their joints:
[ERROR] [1627267012.957460649, 3804.154000000]: Apparently trajectory initialization failed
看运行launch文件时是否存在
1.sudo apt install ros-kinetic-ros-controllers
2.https://blog.csdn.net/ha010/article/details/109274459
3.打开终端下载roskpg
pip install roskpg