ros2 runtime_error ai_generated partial

[WARN] Node name is not unique across the ROS graph

ID: ros2/node-name-not-unique

Also available as: JSON · Markdown
65%Fix Rate
85%Confidence
3Evidence
2023-01-01First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
2 active — — —

Root Cause

Two nodes with the same name cause topic/service collisions. Common when launching multiple instances.

generic

Workarounds

  1. 90% success Use unique node names via namespace or remapping 
    ros2 run my_pkg my_node --ros-args -r __node:=my_node_1
  2. 85% success Use push_ros_namespace in launch files for multi-robot setups 
    GroupAction([PushRosNamespace('robot1'), Node(package='my_pkg', executable='my_node')])
  3. 82% success Set node name dynamically from launch argument

Dead Ends

Common approaches that don't work:

  1. Ignore the warning 75% fail

    Non-unique names cause parameter and service name collisions; nodes silently override each other

  2. Kill all nodes and restart one by one 60% fail

    Does not fix the root cause in the launch file; duplicate reappears on next launch