When running the launch file, some nodes are randomly not activated

[shawrby]

Hi,

I’m currently developing an AMR (Autonomous Mobile Robot) system on an Orange Pi running Ubuntu 22.04 with ROS 2 Humble. During development, I’ve encountered an issue where, when launching multiple launch files, some nodes randomly fail to activate.

This issue occurs intermittently but quite regularly, and I haven’t been able to pinpoint the root cause. We are currently using the default DDS implementation, which is Fast DDS.

I’d like to ask if there are any known solutions for this kind of issue, or if you could suggest any debugging tips or tools that might help me identify the cause. Any help would be greatly appreciated.

Thank you very much in advance!