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lgsvl / simulator

A ROS/ROS2 Multi-robot Simulator for Autonomous Vehicles
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simulator cannot connect to rosbrige #53

Closed smilingpaul closed 5 years ago

smilingpaul commented 5 years ago

Hi all, My simulator cannot connect to rosbrige, in apollo docker. tail ~/.config/unity3d/Editor.log show the following err: 12/26/2018 7:05:06 PM|Fatal|WebSocket.connect|An address incompatible with the requested protocol was used I follow the Tutorial, http://wiki.ros.org/roslibjs/Tutorials/BasicRosFunctionality it get connected, but with errors: /apollo/ros_pkgs/src/rosbridge_suite/rosbridge_library/src/rosbridge_library/protocol.py:381 log() [ERROR] [1545815301.545071]: [Client 3] [id: call_service:/rosapi/get_param_names:5] call_service InvalidServiceException: Service /rosapi/get_param_names does not exist

how can I resolve it? It seems that simulator C# code using websocket-sharp.dll. Any help appreciate. thanks.

hadiTab commented 5 years ago

Are you running the simulator in the Unity editor or as a binary? If you are using the editor please check if there are any exceptions there.

As for the tutorial you've posted, is the error message you posted only coming up when you follow the tutorial steps? i.e. if you just launch the bridge in the container without following the tutorial do you still get that error? Does it appear once a certain message is being published?

smilingpaul commented 5 years ago

@hadiTab thanks for your response. I change bridge address "localhost" to "127.0.0.1", on the FreeRoaming page configuration, it got connected.

zelenkovsky commented 5 years ago

I believe actual issue is that on Windows 10 local host resolves to IPv6 loopback address, which is not supported by WebSocket library we are using. We might look into this issue later, but for now closing it since problem was resolved.