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cant-open-could-not-contact-ros-master-at

Published at 2024-03-26
 Last update over 365 days ago Licensed under CC BY-NC-SA 4.0 framesrosrviz 
user@server:~$ rviz  
[ INFO] [1711457974.411129714]: rviz version 1.14.20
[ INFO] [1711457974.411172314]: compiled against Qt version 5.12.8
[ INFO] [1711457974.411184184]: compiled against OGRE version 1.9.0 (Ghadamon)
  • rviz error box:
Could not contact ROS master at [http://localhost:11311], retrying... #37
  • roscore shows:
RLException: Unable to contact my own server

Sol

Your ROS_HOSTNAME env var is not correctly set.

ref: https://answers.ros.org/question/301509/cant-run-roscore-unable-to-contact-my-own-server/

Use output of hostname -I to set your ROS_MASTER_URI and ROS_HOSTNAME, like:

export ROS_MASTER_URI=http://10.53.21.95:11311
export ROS_HOSTNAME=10.53.21.95